Table of Contents
IN BRIEF
REVIEW
Growing Out of Stress: The Role of Cell- and Organ-Scale Growth Control in Plant Water-Stress ResponsesThis review focuses on defining the processes that regulate root system growth and the mechanisms acting during water-deficit stresses that affect growth at the cellular- and organ-wide levels.
BREAKTHROUGH REPORT
In Planta Single-Molecule Pull-Down Reveals Tetrameric Stoichiometry of HD-ZIPIII:LITTLE ZIPPER ComplexesEstablishment of single-molecule pull-down in plants allows rapid, sensitive, and quantitative interrogation of protein interactions and reveals tetrameric HD-ZIPIII:ZPR complexes.
LARGE-SCALE BIOLOGY ARTICLE
Local Auxin Biosynthesis Mediated by a YUCCA Flavin Monooxygenase Regulates Haustorium Development in the Parasitic Plant Phtheirospermum japonicumIn the parasitic plant Phtheirospermum japonicum, the auxin biosynthesis gene YUCCA3 plays a pivotal role in the formation of haustoria, which invade host tissues and facilitate nutrient acquisition.
RESEARCH ARTICLES
Rapid Evolution of Genomic Imprinting in Two Species of the BrassicaceaeGenomic imprinting is a rapidly evolving phenomenon in plants; however, for those genes where imprinting conveys an advantage, imprinted expression is maintained over long evolutionary timescales.
CYTOKININ RESPONSE FACTOR2 (CRF2) and CRF3 Regulate Lateral Root Development in Response to Cold Stress in ArabidopsisCRF2 and CRF3, encoding APETALA2 transcription factors, play an important role in lateral root initiation and root system architecture changes under cold stress.
SHORT-ROOT Deficiency Alleviates the Cell Death Phenotype of the Arabidopsis catalase2 Mutant under Photorespiration-Promoting ConditionsThe photorespiratory phenotype of the CATALASE2-deficient Arabidopsis mutant is alleviated in the absence of the SHORT-ROOT transcription factor.
Regulation of Leaf Starch Degradation by Abscisic Acid Is Important for Osmotic Stress Tolerance in PlantsStarch in the chloroplasts of osmotically stressed leaves is degraded by the synergistic action of abscisic acid-controlled enzymes to sustain both carbon export to the root and osmolyte accumulation.
MEIOTIC F-BOX Is Essential for Male Meiotic DNA Double-Strand Break Repair in RiceThe plant-specific F-box protein MEIOTIC F-BOX plays critical roles in male meiotic DNA double-strand break repair and is required for male meiotic progression in rice.
The PHD Finger Protein MMD1/DUET Ensures the Progression of Male Meiotic Chromosome Condensation and Directly Regulates the Expression of the Condensin Gene CAP-D3MMD1, a reader of histone modifications, is required for progressive compaction of meiotic chromosomes during prophase I in a manner partially dependent on expression of the condensin gene CAP-D3.
The Arabidopsis SR45 Splicing Factor, a Negative Regulator of Sugar Signaling, Modulates SNF1-Related Protein Kinase 1 StabilityRNA-binding protein SR45, a negative regulator of glucose and abscisic acid (ABA) signaling, promotes the proteasomal degradation of SnRK1, an energy sensor that coordinates sugar and ABA responses.
Metabolite Diversity in Alkaloid Biosynthesis: A Multilane (Diastereomer) Highway for Camptothecin Synthesis in Camptotheca acuminataUnlike previously characterized monoterpene indole alkaloid (MIA)-producing plants, Camptotheca acuminata uses an alternative seco-iridoid pathway to form diastereomer intermediates for the biosynthesis of the MIA camptothecin.
Structural Analysis of an Avr4 Effector Ortholog Offers Insight into Chitin Binding and Recognition by the Cf-4 ReceptorStructure-function analysis reveals that chitin binding by Pf-Avr4, a fungal Avr4 effector, is largely separable from recognition by the cognate Cf-4 receptor.
Plasma Membrane Microdomains Are Essential for Rac1-RbohB/H-Mediated Immunity in RiceMicrodomains rich in 2-hydroxy sphingolipid play an essential role in chitin-triggered immunity by stimulating ROS production through the Rac/ROP small GTPase Rac1 and NADPH oxidases RbohB/H in rice.
COMMENTARY
Based on the strengths and weaknesses of different measures to estimate genome assembly and gene space completeness, guidelines for future plant genome projects are provided.