Table of Contents
IN BRIEF
REVIEW
The Regulation of Cellulose Biosynthesis in PlantsRecent findings reveal how plants regulate cellulose biosynthesis.
BREAKTHROUGH REPORT
Plant Extracellular Vesicles Contain Diverse Small RNA Species and Are Enriched in 10- to 17-Nucleotide “Tiny” RNAsThe extracellular space of Arabidopsis leaves contains diverse small RNAs, both inside and outside of extracellular vesicles, with the former being enriched in 10- to 17-nucleotide–long “tiny” RNAs.
LARGE-SCALE BIOLOGY ARTICLES
Phloem Companion Cell-Specific Transcriptomic and Epigenomic Analyses Identify MRF1, a Regulator of FloweringAnalysis of the responses in the epigenome and transcriptome in the phloem companion cells of Arabidopsis following a change in daylength identifies the flowering-time regulator MRF1.
The Systems Architecture of Molecular Memory in Poplar after Abiotic StressThe transcriptomic memory in poplar trees after recovery from drought-heat stress changes with stress frequency and intensity and involves a complex interplay of common and tissue-specific factors.
RESEARCH ARTICLES
Genome-Scale Sequence Disruption Following Biolistic Transformation in Rice and MaizeBiolistic transformation is a disruptive process that can cause extensive damage and rearrangements, including deletions, duplications, chromosome fusions, and copy number variations.
Chloroplasts Modulate Elongation Responses to Canopy Shade by Retrograde Pathways Involving HY5 and Abscisic AcidLight and retrograde pathways interact to regulate the hypocotyl elongation response to shade.
Interaction and Regulation Between Lipid Mediator Phosphatidic Acid and Circadian Clock RegulatorsThe lipid mediator phosphatidic acid interacts with and modulates the function of the core clock regulators and may act as a cellular conduit to integrate the circadian clock with lipid metabolism.
Oscillating Aquaporin Phosphorylation and 14-3-3 Proteins Mediate the Circadian Regulation of Leaf HydraulicsA mechanism is established that tunes the hydraulics of leaf tissues to synchronize water supply with day and night cycles, thereby optimizing plant growth.
The Histone H3K4 Demethylase JMJ16 Represses Leaf Senescence in ArabidopsisAge-dependent downregulation of JMJ16, a specific H3K4 demethylase, is required for epigenetic reprograming of senescence-associated gene expression during leaf senescence.
Meiocyte-Specific and AtSPO11-1–Dependent Small RNAs and Their Association with Meiotic Gene Expression and RecombinationMeiocyte small RNAs have a distinct distribution, a positive correlation with meiocyte gene expression, and SPO11-1–dependent sRNAs are associated with meiotic crossover motifs.
Maize Dek15 Encodes the Cohesin-Loading Complex Subunit SCC4 and Is Essential for Chromosome Segregation and Kernel DevelopmentThe classic maize mutant dek15 is mutated in a cohesin loader subunit SISTER CHROMATID COHESION PROTEIN 4 that is essential for mitotic chromosome segregation and maize kernel development.
The PROTEIN PHOSPHATASE4 Complex Promotes Transcription and Processing of Primary microRNAs in ArabidopsisThe highly conserved PROTEIN PHOSPHATASE4 complex coordinates the transcription and processing steps of microRNA biogenesis and plays broader roles in nuclear RNA metabolism in Arabidopsis (Arabidopsis thaliana).
Interactions of Tomato and Botrytis cinerea Genetic Diversity: Parsing the Contributions of Host Differentiation, Domestication, and Pathogen VariationThe necrotrophic pathogen Botrytis cinerea has a highly polygenic basis of virulence across genetically variable tomato, which should be considered when breeding for pathogen resistance.
The Cotton Apoplastic Protein CRR1 Stabilizes Chitinase 28 to Facilitate Defense against the Fungal Pathogen Verticillium dahliaeCotton Cys-rich repeat protein 1 participates in defense responses by protecting chitinase 28 from cleavage by a Ser protease of Verticillium dahliae.
Arabidopsis SME1 Regulates Plant Development and Response to Abiotic Stress by Determining Spliceosome Activity SpecificitySME1 has a critical role in plant development and interaction with the environment by ensuring adequate splicing of specific precursor-messenger RNAs.
