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Plant sigma factors are nuclear-encoded regulators of plastid transcription. A nuclear-encoded sigma factor integrates low-temperature and circadian signals, contributing to photosynthetic resilience to long-term cold.
Auxin is a key regulator in vascular cambium development. This study shows that gibberellins promote polar auxin transport along the root, which leads to broadening of high auxin signalling domain in cambium, and thus, to increased xylem formation.
The sugarcane relative, Erianthus rufipilus, is one of the rare diploid species within the Saccharum complex. Its gap-free genome reveals centromere diversification, epigenetics of a palaeo-duplicated chromosome and evolution of Saccharum.
The study describes the development and validation of Multi-Knock, a genome-scale clustered regularly interspaced short palindromic repeat toolbox that overcomes functional redundancy in plants by simultaneously targeting multiple gene-family members, thus identifying genetically hidden components.
Dawe et al. report a protein tethering method for recruiting Centromeric Histone H3 to synthetic repeat arrays. Newly recruited Centromeric Histone H3 organized functional centromeres that supported independent chromosome segregation for several generations.
This study identified two dirigent proteins responsible for the biosynthesis of the two enantiomers of gossypol in cotton. Editing one of the dirigent proteins selectively removed the toxic (−)-gossypol in cotton seeds without affecting pest resistance.
A recent study using genomic modelling has uncovered the complex population history of wheat in the Holocene, identified convergent adaptation during bread wheat’s spread across Eurasia and predicted future population decline of its key relatives.
TurboID-based proteomic profiling of meiotic chromosome axes in Arabidopsis enables identification of proximate proteins in rare cell types such as meiotic cells. Among 39 ASY1 and/or ASY3 proximate proteins known and new meiotic proteins were found.
The global distribution of tree species shows obvious edges corresponding to the boundaries of biomes due to high spatial climate heterogeneity. The poleward migration of tree species as a result of climate change will be hindered by steep climatic gradients.
Using a gain-of-function method, this work identified 14 plant proteins that can repress gene expression via diverse epigenetic pathways, including DNA methylation, histone modifications and interference of RNA polymerase II transcription.
A plant-specific GCN5-containing histone acetyltransferase complex, which was termed PAGA, cooperates with the conserved GCN5-containing SAGA complex to regulate histone acetylation, transcription and development.
The authors present a multidisciplinary approach investigating the mechanistic underpinnings of galactan synthase 1 and use their data to propose a new model for complex pectin biosynthesis.
A chitinase gene is responsible for the hybrid necrosis between two young Petunia species. This gene is tightly linked with genes in pollinator-mediated reproductive isolation, suggesting cooperation of pre- and post-zygotic barriers.
Multiple omics approaches suggest that FUL binding complexes are tissue specific, and the difference in composition of the binding complexes leads to different DNA binding specificity, thus contributing to the dual biological functions.
By improving ribosome footprinting, Zhou et al. show that HEM1 utilizes a plant-specific condensation domain to control immune gene translation, which is essential in preventing immunopathology-associated tissue damage.
This description of the Sphagnum (peat moss) genome includes a newly discovered sex chromosome. Interactions among sex, autosomes and environment show direct effects on Sphagnum growth which influences global carbon sequestration.
The authors show that photoperiod controls seed size in multiple plant species. CONSTANS, the central regulator of photoperiod, directly represses the transcription of AP2, thereby controlling seed size in both Arabidopsis and soybean.
LEAFY is a master transcription factor that regulates flower development through interaction with other proteins such as the F-box UFO. This study shows that UFO unexpectedly acts as a transcriptional cofactor that drives LEAFY to new genomic locations.
In land plants, the Ia and IIIb basic helix–loop–helix (Ia-IIIb bHLH) module regulates stomatal development. This study shows that a Ia-IIIb bHLH heterodimer, MpSETA-MpICE2, regulates seta formation in Marchantia and suggests a common mechanism underlying stomata and setae formation.