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Posts by Journal of Experimental Botany

Fig. 3.Simplified model for photoperiod sensing in plants. (A) The transcription of a photoperiod sensor is regulated by the circadian clock and light signals (black arrows). The protein stability of the sensor is regulated by light (magenta arrows). The sensor can act negatively (short-day responses) or positively (long-day responses) on the accumulation of a mobile signal, which moves to the meristem to trigger developmental responses. (B) Simplified model of long-day induction of flowering in Arabidopsis. The transcription of CO is controlled by the clock and light signals such that its mRNA peaks at the end of the light period. Light is needed for the stabilization and accumulation of CO protein, so that it only accumulates during long days enabling the production of the mobile signal FT (FLOWERING LOCUS T).

Fig. 3.Simplified model for photoperiod sensing in plants. (A) The transcription of a photoperiod sensor is regulated by the circadian clock and light signals (black arrows). The protein stability of the sensor is regulated by light (magenta arrows). The sensor can act negatively (short-day responses) or positively (long-day responses) on the accumulation of a mobile signal, which moves to the meristem to trigger developmental responses. (B) Simplified model of long-day induction of flowering in Arabidopsis. The transcription of CO is controlled by the clock and light signals such that its mRNA peaks at the end of the light period. Light is needed for the stabilization and accumulation of CO protein, so that it only accumulates during long days enabling the production of the mobile signal FT (FLOWERING LOCUS T).

⏰ DARWIN REVIEW ⏰

Feke & Farré summarize evidence for the circadian clock's adaptive role in wild plants, exploring the hypothesis that variation in clock output pathways drives different phenotypic responses, permitting the use of different life history strategies to optimize growth and survival.

21 hours ago 10 6 1 0
Fig. 2 (shortened, full legend in paper): Mass spectrometry imaging of sucrose and photoassimilate. (A) Three-dimensional Magnetic Resonance Imaging (MRI) model of intact pea seeds at an early developmental stage, with a virtual slice (α), endosperm (en), and seed coat (sc) indicated. (B) Chemical shift imaging (CSI) spectrum of pea seed at virtual slice (α) (normalized to the water signal measured without water suppression) and corresponding metabolite maps generated by integration of the sucrose and alanine peaks. Reproduced from Mayer et al. (2024) (CC BY). (C, D) NanoSIMS images of wheat showing assimilated 13C (from 13CO2) in the stele of a mature fine root with xylem vessel (X) and phloem sieve element (P) (C) and close to the root tip of a developing root with vascular cell (V) (D) at subcellular resolution. Root cell structure is visible in the greyscale 12C14N image (left), with the corresponding 13C:12C image (right) reflecting levels of 13C-enrichment.

Fig. 2 (shortened, full legend in paper): Mass spectrometry imaging of sucrose and photoassimilate. (A) Three-dimensional Magnetic Resonance Imaging (MRI) model of intact pea seeds at an early developmental stage, with a virtual slice (α), endosperm (en), and seed coat (sc) indicated. (B) Chemical shift imaging (CSI) spectrum of pea seed at virtual slice (α) (normalized to the water signal measured without water suppression) and corresponding metabolite maps generated by integration of the sucrose and alanine peaks. Reproduced from Mayer et al. (2024) (CC BY). (C, D) NanoSIMS images of wheat showing assimilated 13C (from 13CO2) in the stele of a mature fine root with xylem vessel (X) and phloem sieve element (P) (C) and close to the root tip of a developing root with vascular cell (V) (D) at subcellular resolution. Root cell structure is visible in the greyscale 12C14N image (left), with the corresponding 13C:12C image (right) reflecting levels of 13C-enrichment.

🍬🔬 REVIEW 🔬🍬

"Resolving subcellular sucrose concentrations in plant tissues" - Zhang et al.

🔗 doi.org/10.1093/jxb/...

#PlantScience 🧪

5 hours ago 6 5 0 0
Fig. 2 (shortened, full legend in paper): Mass spectrometry imaging of sucrose and photoassimilate. (A) Three-dimensional Magnetic Resonance Imaging (MRI) model of intact pea seeds at an early developmental stage, with a virtual slice (α), endosperm (en), and seed coat (sc) indicated. (B) Chemical shift imaging (CSI) spectrum of pea seed at virtual slice (α) (normalized to the water signal measured without water suppression) and corresponding metabolite maps generated by integration of the sucrose and alanine peaks. Reproduced from Mayer et al. (2024) (CC BY). (C, D) NanoSIMS images of wheat showing assimilated 13C (from 13CO2) in the stele of a mature fine root with xylem vessel (X) and phloem sieve element (P) (C) and close to the root tip of a developing root with vascular cell (V) (D) at subcellular resolution. Root cell structure is visible in the greyscale 12C14N image (left), with the corresponding 13C:12C image (right) reflecting levels of 13C-enrichment.

Fig. 2 (shortened, full legend in paper): Mass spectrometry imaging of sucrose and photoassimilate. (A) Three-dimensional Magnetic Resonance Imaging (MRI) model of intact pea seeds at an early developmental stage, with a virtual slice (α), endosperm (en), and seed coat (sc) indicated. (B) Chemical shift imaging (CSI) spectrum of pea seed at virtual slice (α) (normalized to the water signal measured without water suppression) and corresponding metabolite maps generated by integration of the sucrose and alanine peaks. Reproduced from Mayer et al. (2024) (CC BY). (C, D) NanoSIMS images of wheat showing assimilated 13C (from 13CO2) in the stele of a mature fine root with xylem vessel (X) and phloem sieve element (P) (C) and close to the root tip of a developing root with vascular cell (V) (D) at subcellular resolution. Root cell structure is visible in the greyscale 12C14N image (left), with the corresponding 13C:12C image (right) reflecting levels of 13C-enrichment.

🍬🔬 REVIEW 🔬🍬

"Resolving subcellular sucrose concentrations in plant tissues" - Zhang et al.

🔗 doi.org/10.1093/jxb/...

#PlantScience 🧪

5 hours ago 6 5 0 0

🔗 doi.org/10.1093/jxb/...
#PlantScience 🧪

21 hours ago 0 1 0 0
Fig. 3.Simplified model for photoperiod sensing in plants. (A) The transcription of a photoperiod sensor is regulated by the circadian clock and light signals (black arrows). The protein stability of the sensor is regulated by light (magenta arrows). The sensor can act negatively (short-day responses) or positively (long-day responses) on the accumulation of a mobile signal, which moves to the meristem to trigger developmental responses. (B) Simplified model of long-day induction of flowering in Arabidopsis. The transcription of CO is controlled by the clock and light signals such that its mRNA peaks at the end of the light period. Light is needed for the stabilization and accumulation of CO protein, so that it only accumulates during long days enabling the production of the mobile signal FT (FLOWERING LOCUS T).

Fig. 3.Simplified model for photoperiod sensing in plants. (A) The transcription of a photoperiod sensor is regulated by the circadian clock and light signals (black arrows). The protein stability of the sensor is regulated by light (magenta arrows). The sensor can act negatively (short-day responses) or positively (long-day responses) on the accumulation of a mobile signal, which moves to the meristem to trigger developmental responses. (B) Simplified model of long-day induction of flowering in Arabidopsis. The transcription of CO is controlled by the clock and light signals such that its mRNA peaks at the end of the light period. Light is needed for the stabilization and accumulation of CO protein, so that it only accumulates during long days enabling the production of the mobile signal FT (FLOWERING LOCUS T).

⏰ DARWIN REVIEW ⏰

Feke & Farré summarize evidence for the circadian clock's adaptive role in wild plants, exploring the hypothesis that variation in clock output pathways drives different phenotypic responses, permitting the use of different life history strategies to optimize growth and survival.

21 hours ago 10 6 1 0

#PlantScience 🧪

1 day ago 0 0 0 0
Fig. 1 (shortened, full legend in paper): Intercellular communication systems across organisms. (A) Gap junctions in animal cells allow direct cytoplasmic exchange of small molecules (<1 kDa) through protein channels spanning adjacent plasma membranes. N, nucleus; PM, plasma membrane. (B) Septal junctions in filamentous cyanobacteria are proteinaceous, gap junction-like channels that connect adjacent cells and enable reversible, gated intercellular communication. OM, outer membrane; PG, peptidoglycan layer; CM, cytoplasmic membrane. (C) Tunneling nanotubes in mammalian cells form actin-based cytoplasmic bridges capable of transporting macromolecules, organelles, and pathogens over longer distances.

Fig. 1 (shortened, full legend in paper): Intercellular communication systems across organisms. (A) Gap junctions in animal cells allow direct cytoplasmic exchange of small molecules (<1 kDa) through protein channels spanning adjacent plasma membranes. N, nucleus; PM, plasma membrane. (B) Septal junctions in filamentous cyanobacteria are proteinaceous, gap junction-like channels that connect adjacent cells and enable reversible, gated intercellular communication. OM, outer membrane; PG, peptidoglycan layer; CM, cytoplasmic membrane. (C) Tunneling nanotubes in mammalian cells form actin-based cytoplasmic bridges capable of transporting macromolecules, organelles, and pathogens over longer distances.

🚦🌱 REVIEW 🌱🚦

Worthington & Lee review how cell-to-cell signaling via plasmodesmata emerges from core regulatory machinery and recurring mechanistic themes, enabling context-dependent coordination of development and responses to environmental cues and stresses.

🔗 doi.org/10.1093/jxb/...

1 day ago 7 3 2 0
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Forest interactions Explore plant interactions in forest environments at all levels from micro- to macro-scales and across the whole spectrum of plant biology.Abstract submission now open - deadline 20 May 2026

Join our exciting line-up of speakers – submit your abstract for the 48th New Phytologist Symposium: Forest interactions!

Deadline: 20 May

📅 13–16 October 2026
📍 Leysin, Switzerland

www.newphytologist.org/events/48-nps

#PlantScience

1 day ago 15 9 0 0
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A metabolic complex of acyltransferase enzymes involved in tomato acylsugar biosynthesis Abstract. Specialized metabolites mediate diverse plant-environment interactions. Recent work has begun to enzymatically characterize entire plant speciali

A metabolic complex of acyltransferase enzymes involved in tomato acylsugar biosynthesis academic.oup.com/jxb/article/... @jxbotany.bsky.social

2 days ago 2 3 0 0
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Regulation of Tocopherol (Vitamin E) biosynthesis in Arabidopsis Abstract. Tocochromanols, including tocopherols and tocotrienols, encompass a group of lipid antioxidants that are synthesized in chloroplasts of photosynt

Regulation of Tocopherol (Vitamin E) biosynthesis in Arabidopsis academic.oup.com/jxb/article-... @jxbotany.bsky.social

2 days ago 1 1 0 0
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Fig. 1 (shortened, full legend in paper): Domain architecture and phylogenetic relationships of PHR1 and its homologues across plant species. (A) Schematic representation of AtPHR1 domain structure. The domain organization of Arabidopsis thaliana PHR1 (AtPHR1) is depicted, highlighting the myeloblastosis (MYB) DNA-binding domain and the MYB–coiled-coil (CC) domain. (B) Phylogenetic analysis of PHR1 homologues in diverse plant species. Evolutionary relationships among PHR1-like proteins from Solanum lycopersicum, Oryza sativa, Zea mays, Arabidopsis thaliana, and Chlamydomonas reinhardtii were inferred based on predicted protein sequences. The Arabidopsis PHR1 protein (Gene ID: AT4G28610) was used as a query to identify homologues in the selected species. Sequence alignment was performed using MAFFT v7.475 (https://mafft.cbrc.jp) and the phylogenetic tree was constructed using the Neighbor-joining method with 1000 bootstrap replicates.

Fig. 1 (shortened, full legend in paper): Domain architecture and phylogenetic relationships of PHR1 and its homologues across plant species. (A) Schematic representation of AtPHR1 domain structure. The domain organization of Arabidopsis thaliana PHR1 (AtPHR1) is depicted, highlighting the myeloblastosis (MYB) DNA-binding domain and the MYB–coiled-coil (CC) domain. (B) Phylogenetic analysis of PHR1 homologues in diverse plant species. Evolutionary relationships among PHR1-like proteins from Solanum lycopersicum, Oryza sativa, Zea mays, Arabidopsis thaliana, and Chlamydomonas reinhardtii were inferred based on predicted protein sequences. The Arabidopsis PHR1 protein (Gene ID: AT4G28610) was used as a query to identify homologues in the selected species. Sequence alignment was performed using MAFFT v7.475 (https://mafft.cbrc.jp) and the phylogenetic tree was constructed using the Neighbor-joining method with 1000 bootstrap replicates.

🌱🧬 REVIEW 🧬🌱

PHR proteins, classically characterized for their role in the phosphorus starvation response in plants, have also acquired new roles. The genetic and molecular basis of their functional diversity is discussed here - Mangalakkadan et al.

🔗 doi.org/10.1093/jxb/...

#PlantScience 🧪

4 days ago 7 3 0 0
Fig. 1 (shortened, full legend in paper): Domain architecture and phylogenetic relationships of PHR1 and its homologues across plant species. (A) Schematic representation of AtPHR1 domain structure. The domain organization of Arabidopsis thaliana PHR1 (AtPHR1) is depicted, highlighting the myeloblastosis (MYB) DNA-binding domain and the MYB–coiled-coil (CC) domain. (B) Phylogenetic analysis of PHR1 homologues in diverse plant species. Evolutionary relationships among PHR1-like proteins from Solanum lycopersicum, Oryza sativa, Zea mays, Arabidopsis thaliana, and Chlamydomonas reinhardtii were inferred based on predicted protein sequences. The Arabidopsis PHR1 protein (Gene ID: AT4G28610) was used as a query to identify homologues in the selected species. Sequence alignment was performed using MAFFT v7.475 (https://mafft.cbrc.jp) and the phylogenetic tree was constructed using the Neighbor-joining method with 1000 bootstrap replicates.

Fig. 1 (shortened, full legend in paper): Domain architecture and phylogenetic relationships of PHR1 and its homologues across plant species. (A) Schematic representation of AtPHR1 domain structure. The domain organization of Arabidopsis thaliana PHR1 (AtPHR1) is depicted, highlighting the myeloblastosis (MYB) DNA-binding domain and the MYB–coiled-coil (CC) domain. (B) Phylogenetic analysis of PHR1 homologues in diverse plant species. Evolutionary relationships among PHR1-like proteins from Solanum lycopersicum, Oryza sativa, Zea mays, Arabidopsis thaliana, and Chlamydomonas reinhardtii were inferred based on predicted protein sequences. The Arabidopsis PHR1 protein (Gene ID: AT4G28610) was used as a query to identify homologues in the selected species. Sequence alignment was performed using MAFFT v7.475 (https://mafft.cbrc.jp) and the phylogenetic tree was constructed using the Neighbor-joining method with 1000 bootstrap replicates.

🌱🧬 REVIEW 🧬🌱

PHR proteins, classically characterized for their role in the phosphorus starvation response in plants, have also acquired new roles. The genetic and molecular basis of their functional diversity is discussed here - Mangalakkadan et al.

🔗 doi.org/10.1093/jxb/...

#PlantScience 🧪

4 days ago 7 3 0 0
Fig. 1.Pyramidal workflow to unravel regulatory networks in crops. Séne et al. (2026) delineate an innovative workflow that integrates transcriptomic data with a protoplast-based transient expression system (PTES) to decipher the first regulatory network governing grain development in sorghum. From bottom to top: gathering transcriptomic data of grain quality (trait of interest) across distinct environments and genetic backgrounds; identification of regulatory relationships and functional modules (i.e., protein digestibility loss, protein accumulation, starch accumulation, and starch and protein accumulation); validation of candidate hub genes using PTES, ChIP-Seq, and laser microdissection-based transcriptomics; and construction of a refined regulatory network governing grain quality in sorghum.

Fig. 1.Pyramidal workflow to unravel regulatory networks in crops. Séne et al. (2026) delineate an innovative workflow that integrates transcriptomic data with a protoplast-based transient expression system (PTES) to decipher the first regulatory network governing grain development in sorghum. From bottom to top: gathering transcriptomic data of grain quality (trait of interest) across distinct environments and genetic backgrounds; identification of regulatory relationships and functional modules (i.e., protein digestibility loss, protein accumulation, starch accumulation, and starch and protein accumulation); validation of candidate hub genes using PTES, ChIP-Seq, and laser microdissection-based transcriptomics; and construction of a refined regulatory network governing grain quality in sorghum.

🌾🧬 INSIGHT 🧬🌾

"Working with the grain: uncovering sorghum quality regulatory networks".
López-Gómez et al. comment on recent research by Séne et al.

📝 Insight: doi.org/10.1093/jxb/...
🔬 Research: doi.org/10.1093/jxb/...

#PlantScience 🧪

4 days ago 3 0 0 0
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Welcome to our new editorial intern @lealorrainsoligon.bsky.social !

Léa’s work focuses on how environmental stressors affect organismal physiology and biodiversity. Her current research investigates the effects of salinity and temperature on amphibians.

5 days ago 7 3 0 0
The cover of Vol 77 | Issue 8 | 2026 of the Journal of Experimental Botany. Pink coloured banners border the top and bottom of the page and in the centre is a panoramic X-ray fluorescence imaging of Mn (green), Fe (red), and Zn (blue) distribution in a small region (∼ 500 mm by 400 mm; 500 nm resolution) within the rice radicle and part of the plumule of rice embryo. Credits: measurements performed by João Paulo R. Marques at the CARNAÚBA X-ray nanoprobe beamline of Brazilian Synchrotron Light Source (LNLS/Sirius). See Benato et al., pp. 2264–2281.

The cover of Vol 77 | Issue 8 | 2026 of the Journal of Experimental Botany. Pink coloured banners border the top and bottom of the page and in the centre is a panoramic X-ray fluorescence imaging of Mn (green), Fe (red), and Zn (blue) distribution in a small region (∼ 500 mm by 400 mm; 500 nm resolution) within the rice radicle and part of the plumule of rice embryo. Credits: measurements performed by João Paulo R. Marques at the CARNAÚBA X-ray nanoprobe beamline of Brazilian Synchrotron Light Source (LNLS/Sirius). See Benato et al., pp. 2264–2281.

📢 🔬 Issue 8 of JXB is out now 🔬 📢

📔 On the cover: A panoramic X-ray fluorescence imaging of Mn (green), Fe (red), and Zn (blue) distribution within the rice radicle and part of the plumule of rice embryo (image credit: João Paulo R. Marques).

🔗 academic.oup.com/jxb...

#PlantScience 🧪

6 days ago 9 4 1 0
Fig. 1 (shortened, full legend in paper): Schematic representation of resin biosynthesis of resistant and susceptible Pinus seedlings in response to Fusarium circinatum. Resistant (Pinus pinaster) and susceptible (Pinus radiata) hosts differ in defense timing, terpene composition, and resin duct responses. P. pinaster has a higher constitutive resin content enriched in STs and a smaller resin duct system. In contrast, P. radiata is enriched in MTs and has larger resin ducts. Upon infection with F. circinatum, resistant seedlings show early induced accumulation of STs and DTs, with limited induction of TRDs, whereas susceptible seedlings show delayed defense responses, increased MTs and DRAs, and increased TRD formation in both xylem and cortex (Fariña-Flores et al., 2026). Constitutive resin profiles represent baseline differences between species, whereas changes in terpene composition and TRD formation occur only following pathogen infection.

Fig. 1 (shortened, full legend in paper): Schematic representation of resin biosynthesis of resistant and susceptible Pinus seedlings in response to Fusarium circinatum. Resistant (Pinus pinaster) and susceptible (Pinus radiata) hosts differ in defense timing, terpene composition, and resin duct responses. P. pinaster has a higher constitutive resin content enriched in STs and a smaller resin duct system. In contrast, P. radiata is enriched in MTs and has larger resin ducts. Upon infection with F. circinatum, resistant seedlings show early induced accumulation of STs and DTs, with limited induction of TRDs, whereas susceptible seedlings show delayed defense responses, increased MTs and DRAs, and increased TRD formation in both xylem and cortex (Fariña-Flores et al., 2026). Constitutive resin profiles represent baseline differences between species, whereas changes in terpene composition and TRD formation occur only following pathogen infection.

🍄🌲 INSIGHT 🍄🌲

"Resin defense in Pinus–Fusarium circinatum interactions: an evolutionary paradox". Mmushi et al. comment on recent research by Fariña-Flores et al.

📝 Insight: doi.org/10.1093/jxb/...
🔬 Research: doi.org/10.1093/jxb/...

#PlantScience 🧪

6 days ago 2 3 0 0

SEBiology

6 days ago 0 0 0 0
The cover of Vol 77 | Issue 8 | 2026 of the Journal of Experimental Botany. Pink coloured banners border the top and bottom of the page and in the centre is a panoramic X-ray fluorescence imaging of Mn (green), Fe (red), and Zn (blue) distribution in a small region (∼ 500 mm by 400 mm; 500 nm resolution) within the rice radicle and part of the plumule of rice embryo. Credits: measurements performed by João Paulo R. Marques at the CARNAÚBA X-ray nanoprobe beamline of Brazilian Synchrotron Light Source (LNLS/Sirius). See Benato et al., pp. 2264–2281.

The cover of Vol 77 | Issue 8 | 2026 of the Journal of Experimental Botany. Pink coloured banners border the top and bottom of the page and in the centre is a panoramic X-ray fluorescence imaging of Mn (green), Fe (red), and Zn (blue) distribution in a small region (∼ 500 mm by 400 mm; 500 nm resolution) within the rice radicle and part of the plumule of rice embryo. Credits: measurements performed by João Paulo R. Marques at the CARNAÚBA X-ray nanoprobe beamline of Brazilian Synchrotron Light Source (LNLS/Sirius). See Benato et al., pp. 2264–2281.

📢 🔬 Issue 8 of JXB is out now 🔬 📢

📔 On the cover: A panoramic X-ray fluorescence imaging of Mn (green), Fe (red), and Zn (blue) distribution within the rice radicle and part of the plumule of rice embryo (image credit: João Paulo R. Marques).

🔗 academic.oup.com/jxb...

#PlantScience 🧪

6 days ago 9 4 1 0
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6 days ago 2 1 0 0
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The RIPE team laser-focused on improving photosynthetic efficiency and new research sheds light on the complex regulation of Rubisco activity. In many plant species, Rubisco activity is inhibited… |... The RIPE team laser-focused on improving photosynthetic efficiency and new research sheds light on the complex regulation of Rubisco activity. In many plant species, Rubisco activity is inhibited by...

Well done to PhD student Connor Nehls, @ecarmosilva.bsky.social and @doug-orr.bsky.social on new work out in @jxbotany.bsky.social on Rubisco dark inhibition. See the release here by @ripeproject.bsky.social www.linkedin.com/posts/ripepr...

6 days ago 11 7 1 0

🚨 SPECIAL ISSUE - FINAL CALL 🚨

📅 🌱 The Plant Growth Substances special issue closes on 30 April 🌱 📅

✍️ Guest edited by Brad Binder, Jennifer Nemhauser, Mark Estelle & Junko Kyozuka

📇 Got a manuscript? Contact us: bit.ly/JXBissues

#PlantScience 🧪 #JXBspecialissues

1 week ago 3 3 0 0
A postcard advertising the Plant Growth Substances special issue displaying an image of actin filaments (green) in a living epidermal cell of Nicotiana benthamiana. Also visible are peroxisomes (blue) and Golgi stacks (faint red spots) and chloroplasts (chlorophyll autofluorescence, large red structures). The ring of bright red chloroplasts on the left marks a pair of guard cells that define a stoma for gas exchange. The image is a maximal intensity projection of a confocal stack captured on the Leica SP8 laser scanning confocal microscope at the University of Tennessee-Knoxville Advanced Microscopy and Imaging Center by Kylie Smith.

A postcard advertising the Plant Growth Substances special issue displaying an image of actin filaments (green) in a living epidermal cell of Nicotiana benthamiana. Also visible are peroxisomes (blue) and Golgi stacks (faint red spots) and chloroplasts (chlorophyll autofluorescence, large red structures). The ring of bright red chloroplasts on the left marks a pair of guard cells that define a stoma for gas exchange. The image is a maximal intensity projection of a confocal stack captured on the Leica SP8 laser scanning confocal microscope at the University of Tennessee-Knoxville Advanced Microscopy and Imaging Center by Kylie Smith.

🔬 UPCOMING SPECIAL ISSUE 🔬

🌱 Plant Growth Substances 🌱

✍️ Guest edited by Brad Binder, Jennifer Nemhauser, Mark Estelle & Junko Kyozuka

📅 Deadline 30 April 2026

📄 We welcome contributions! Got a manuscript? Contact JXB office 👉 bit.ly/JXBissues

#JXBspecialissues #PlantScience 🧪

3 months ago 11 3 1 1
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Remembering Professor Philippa Borrill: A leading voice in plant science The SEB mourns the loss of Professor Philippa Borrill, an outstanding plant scientist, inspiring leader, and 2022 SEB Plant President Medallist.

We are deeply saddened by the passing of Professor Philippa Borrill, SEB Plant President Medallist (2022).

Her work and mentorship had a lasting impact on the plant science community.

Read our tribute: www.sebiology.org/resource/rem...

⬇️ Her Scientists with Impact interview is in this thread

1 week ago 8 5 1 0

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1 week ago 3 0 0 0
Fig. 1.Diagrams depict the anatomy of Spring32 wild-type pennycress seeds, emphasizing seed coat structure at 7 and 27 DAP. (A) A diagram shows the anatomy of the cross-section of a 7 DAP pennycress seed. (B) A diagram shows the seed coat cell layers and endosperm at 27 DAP. Note that the ii1 layer adjacent to the endosperm accumulates PAs and PA monomers. (C) A diagram shows the seed coat, endosperm, and embryo at 27 DAP. Note the cuticle layer between the endosperm and the PA-accumulating ii1 layer, and the thickened oi1 cell wall containing PAs and PA monomers adjacent to ii cell layers. In (B) and (C), the ii and oi layers are numbered 1, 2, and 3 from the embryo side to the seed surface.

Fig. 1.Diagrams depict the anatomy of Spring32 wild-type pennycress seeds, emphasizing seed coat structure at 7 and 27 DAP. (A) A diagram shows the anatomy of the cross-section of a 7 DAP pennycress seed. (B) A diagram shows the seed coat cell layers and endosperm at 27 DAP. Note that the ii1 layer adjacent to the endosperm accumulates PAs and PA monomers. (C) A diagram shows the seed coat, endosperm, and embryo at 27 DAP. Note the cuticle layer between the endosperm and the PA-accumulating ii1 layer, and the thickened oi1 cell wall containing PAs and PA monomers adjacent to ii cell layers. In (B) and (C), the ii and oi layers are numbered 1, 2, and 3 from the embryo side to the seed surface.

🌰🧪 RESEARCH 🧪🌰

Histochemical analyses of pennycress seeds revealed proanthocyanidin deficiency in tt8-2bp seed coats accompanied by increased seed coat permeability, increased imbibition rates, and altered seed aging compared with wild-type seeds - Ding et al.

🔗 doi.org/10.1093/jxb/...

1 week ago 11 4 1 0
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Open questions on facultative C4-CAM photosynthesis in Portulaca Abstract. Plants have evolved carbon concentrating mechanisms (CCMs) to optimize carbon fixation under environmental conditions that increase photorespirat

Open questions on facultative C4-CAM photosynthesis in Portulaca academic.oup.com/jxb/article/... @jxbotany.bsky.social

1 week ago 3 2 0 0
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Fig. 1.Germination dynamics of freshly harvested Arabidopsis Col-0, the tcp8.1 mutant, and 35S:TCP8-overexpression (OE) seeds. Seeds were imbibed at 20 °C in darkness. (A) Percentage germination with time and (B) final germination after 7 d. Data are means (±SE), n=12–24. Significant differences were determined using one-way ANOVA followed by Tukey’s HSD tests: ***P<0.001; ****P<0.0001.

Fig. 1.Germination dynamics of freshly harvested Arabidopsis Col-0, the tcp8.1 mutant, and 35S:TCP8-overexpression (OE) seeds. Seeds were imbibed at 20 °C in darkness. (A) Percentage germination with time and (B) final germination after 7 d. Data are means (±SE), n=12–24. Significant differences were determined using one-way ANOVA followed by Tukey’s HSD tests: ***P<0.001; ****P<0.0001.

🧬🌱 RESEARCH 🌱🧬

The Class-I TCP transcription factor TCP8 is a negative regulator of seed germination in Arabidopsis that counteracts the function of its close homologue TCP14 - Tian et al.

🔗 doi.org/10.1093/jxb/...
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1 week ago 7 2 0 0

🔗 doi.org/10.1093/jxb/...
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1 week ago 1 0 0 0
Fig. 1 (shortened, full legend in paper): The effect of different temperatures and light/darkness on celery embryo growth and germination. (A) Microscopic images of Apium graveolens cultivar Victoria mericarps (hereafter termed fruits) showing that the morphological dormancy (MD) requires that the small embryo grows within the fruit. This occurs from the start of imbibition at 20 °C in continuous white light onwards to its critical size required for the completion of germination by radicle emergence; modified from Walker et al. (2021). (B) The effect of pre-chilling on the germination of the celery cultivars Victoria, Monterey, and Loretta. (C) The effect of light, darkness, and gibberellin (GA, 100 µM GA4+7) on germination and embryo growth of the three celery cultivars.

Fig. 1 (shortened, full legend in paper): The effect of different temperatures and light/darkness on celery embryo growth and germination. (A) Microscopic images of Apium graveolens cultivar Victoria mericarps (hereafter termed fruits) showing that the morphological dormancy (MD) requires that the small embryo grows within the fruit. This occurs from the start of imbibition at 20 °C in continuous white light onwards to its critical size required for the completion of germination by radicle emergence; modified from Walker et al. (2021). (B) The effect of pre-chilling on the germination of the celery cultivars Victoria, Monterey, and Loretta. (C) The effect of light, darkness, and gibberellin (GA, 100 µM GA4+7) on germination and embryo growth of the three celery cultivars.

🌡️ RESEARCH 🌡️

Non-optimal cold/warm temperatures inhibit germination of morphologically dormant seeds by distinct mechanisms; heat blocks within-seed growth of the underdeveloped embryo, while chilling slows down embryo growth to reach the critical size required for germination - Walker et al.

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Fig. 1.Characterization of mature Cakile maritima seeds collected in Sicily. (A) Dry siliques observed under a binocular microscope. (B) Dissected siliques observed under a binocular microscope. (C) Dry seeds observed by scanning electron microscopy. (D) Dissected embryos observed under a binocular microscope. (E) Whole mounts of cross-sections of endosperm and seed coat observed with Nomarski optics. e, endosperm; sc, seed coat. (F) Total fatty acid content of seeds collected over three consecutive years. Values are mean and SE of four replicates performed on different batches of seeds. Dimensions with a shared letter do not differ significantly as determined by a Kruskal–Wallis test completed by post-hoc Dunn’s test (P<0.05). (G) Fatty acid distribution between zygotic tissues of seeds collected over three consecutive years.

Fig. 1.Characterization of mature Cakile maritima seeds collected in Sicily. (A) Dry siliques observed under a binocular microscope. (B) Dissected siliques observed under a binocular microscope. (C) Dry seeds observed by scanning electron microscopy. (D) Dissected embryos observed under a binocular microscope. (E) Whole mounts of cross-sections of endosperm and seed coat observed with Nomarski optics. e, endosperm; sc, seed coat. (F) Total fatty acid content of seeds collected over three consecutive years. Values are mean and SE of four replicates performed on different batches of seeds. Dimensions with a shared letter do not differ significantly as determined by a Kruskal–Wallis test completed by post-hoc Dunn’s test (P<0.05). (G) Fatty acid distribution between zygotic tissues of seeds collected over three consecutive years.

🌊🌱 RESEARCH 🌱🌊

In Cakile maritima seeds, the storage compounds are unevenly distributed between the embryo and the endosperm, with differing compositions that can be influenced by environmental conditions such as temperature - Miray et al.

🔗 doi.org/10.1093/jxb/...
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