
Cover image

On the Cover: The cover image shows xylem vessel elements converted from mesophyll cells in cotyledons by the application of cytokinin, auxin, and brassinosteroid (the KDB system), and then stained by safranin-O. The image was captured using a confocal laser scanning microscope system (Zeiss LSM 710) by Tian Tian Tan, followed by image processing with Adobe Photoshop by Misato Ohtani and Taku Demura.
Volume 176, Issue 3, March 2018
ON THE INSIDE
On the Inside
EDITORIALS
Plant Physiology Launches Associate Features Editors
New Faces behind the Scenes
LETTERS TO THE EDITOR
Auxin and Vesicle Traffic
Vesicles Accumulating Auxin in Vitro Are Not “Presynaptic”
COMMENTARIES
Coordinating Cell Walls and Cell Growth: A Role for LRX Extensin Chimeras
A Novel Role of Ring Chromosomes as Evolutionary Drivers of Herbicide Resistance
TOPICAL REVIEW
Plant Lipid Droplets and Their Associated Proteins: Potential for Rapid Advances
Plant lipid droplets and their associated oleosin and other proteins have evolved and diversified in functions and cell species specificities and have been probed for commercial uses.
BREAKTHROUGH TECHNOLOGIES
A New Barley Stripe Mosaic Virus Allows Large Protein Overexpression for Rapid Function Analysis
A new BSMV system with high cargo capacity allows large protein overexpression for rapid functional genomic and proteomic studies in monocot and dicot plant species.
RESEARCH REPORT
Gene Duplication and Aneuploidy Trigger Rapid Evolution of Herbicide Resistance in Common Waterhemp
Aneuploidy primes evolution of herbicide resistance in weeds.
Acclimation to Fluctuating Light Impacts the Rapidity of Response and Diurnal Rhythm of Stomatal Conductance
Fluctuating light influences stomatal responses in Arabidopsis independently of the growth light intensity.
Articles
BIOCHEMISTRY AND METABOLISM
N-Glycoproteomic Characterization of Mannosidase and Xylosyltransferase Mutant Strains of Chlamydomonas reinhardtii
Insertional mutagenesis of mannosidase 1A and xylosyltransferase 1A results in altered N-glycan compositions, indicating diverse roles in the trimming and modification of N-glycans in C. reinhardtii.
A Connection between Lysine and Serotonin Metabolism in Rice Endosperm
Serotonin biosynthesis is dramatically elevated, and closely linked with dark-brown color of the endosperm, in high-lysine rice.
CELL BIOLOGY
LRX Proteins Play a Crucial Role in Pollen Grain and Pollen Tube Cell Wall Development
LRR extensins are extracellular proteins that associate with and influence processes at the plasma membrane that are important for pollen grain germination and pollen tube growth.
Pollen-Expressed Leucine-Rich Repeat Extensins Are Essential for Pollen Germination and Growth
Four Leu-rich repeat extensin chimeras, LRX8–11, are redundantly involved in pollen germination and pollen tube growth in Arabidopsis.
Recovery from N Deprivation Is a Transcriptionally and Functionally Distinct State in Chlamydomonas
Recovery from N deprivation follows a distinct transcriptional program in Chlamydomonas.
The Cytokinin Oxidase/Dehydrogenase CKX1 Is a Membrane-Bound Protein Requiring Homooligomerization in the Endoplasmic Reticulum for Its Cellular Activity
The Arabidopsis cytokinin oxidase/dehydrogenase CKX1 plays a key role in cytokinin degradation in the endoplasmic reticulum.
Exocyst Subunit EXO70H4 Has a Specific Role in Callose Synthase Secretion and Silica Accumulation
Exocyst subunit EXO70H4 localizes to the apical subdomain of the trichome. Here, it is responsible for callose synthase secretion; callose is essential for cell wall silicification.
Potato Mop-Top Virus Co-Opts the Stress Sensor HIPP26 for Long-Distance Movement
After a virus movement protein interacts with the HIPP26 stress sensor, the complex relocalizes to the nucleus, activating the drought stress response and thereby facilitating virus long-distance movement.
Ethylene Signaling Modulates Cortical Microtubule Reassembly in Response to Salt Stress
The plant hormone ethylene and its associated signaling pathway are involved in cortical microtubule reassembly, a process that is critical for the salt stress response in Arabidopsis.
ECOPHYSIOLOGY AND SUSTAINABILITY
Knockdown of Rice MicroRNA166 Confers Drought Resistance by Causing Leaf Rolling and Altering Stem Xylem Development
Knockdown of microRNA166 increases drought resistance in rice via decreased stem water conductivity and reduced leaf transpiration rates.
GENES, DEVELOPMENT AND EVOLUTION
Identification of Transcriptional and Receptor Networks That Control Root Responses to Ethylene
The kinetics of changes in the ethylene transcriptome in light-grown roots combined with mutant analyses reveal a central role of the ETR1 receptor and a limited role of EIN3 in root development.
Characterization of Multiple C2 Domain and Transmembrane Region Proteins in Arabidopsis
MCTPs exhibit diverse and overlapping patterns of gene expression and protein localization, and might be involved in Arabidopsis development with potential functional divergence or redundancy.
The Long Intergenic Noncoding RNA (LincRNA) Landscape of the Soybean Genome
The soybean genome encodes over 6,000 long intergenic noncoding RNAs implicated in many biological processes, including transcription, development, and possibly influencing agronomic traits.
The OsFBK1 E3 Ligase Subunit Affects Anther and Root Secondary Cell Wall Thickenings by Mediating Turnover of a Cinnamoyl-CoA Reductase
OsFBK1 mediates the turnover of OsCCR14 via the 26S proteasome pathway, resulting in changes in secondary cell wall content in anthers and roots, without changes in auxin signaling.
Genome-Wide Analysis of the Arabidopsis Replication Timing Program
The Arabidopsis genome replicates in two noninteracting compartments during early/mid and late S phase.
CELLULASE6 and MANNANASE7 Affect Cell Differentiation and Silique Dehiscence
Arabidopsis CEL6 and MAN7 proteins affect cell morphology and silique dehiscence, which can be manipulated to different degrees by altering their activities.
A Pectin Methylesterase Inhibitor Enhances Resistance to Verticillium Wilt
A cotton pectin methylesterase inhibitor interacts with pectin methylesterases, rendering plants more resistant to fungal infection.
ER-Anchored Transcription Factors bZIP17 and bZIP28 Regulate Root Elongation
The bZIP17 and bZIP28 transcription factors have noncanonical target genes and redundantly contribute to both ER homeostasis and root elongation.
Thioredoxin-Mediated ROS Homeostasis Explains Natural Variation in Plant Regeneration
Thioredoxin-dependent redox modification regulates plant regeneration via modulation of ROS homeostasis.
Plant Temperature Acclimation and Growth Rely on Cytosolic Ribosome Biogenesis Factor Homologs
REI1-LIKE ribosome biogenesis factor homologs guide cold acclimation and 60S subunit accumulation for plant growth at alternating temperatures.
Stable Accumulation of Photosystem II Requires ONE-HELIX PROTEIN1 (OHP1) of the Light Harvesting-Like Family
The OHP1 complex is indispensable for protein synthesis and the assembly machinery during de novo synthesis of PSII in plants.
Natural Variation Underlies Differences in ETHYLENE RESPONSE FACTOR17 Activity in Fruit Peel Degreening
ERF17 transcriptional regulation activity in apple fruit peel degreening increases with serine repeat number.
MEMBRANES, TRANSPORT AND BIOENERGETICS
Mitochondria Affect Photosynthetic Electron Transport and Photosensitivity in a Green Alga
Alteration of photosynthetic electron transport, caused by a mitochondrial mutation, showed experimentally that algae better endure light damage targeting photosystem II instead of photosystem I.
An Iron-Activated Citrate Transporter, MtMATE67, Is Required for Symbiotic Nitrogen Fixation
The nodule-specific transporter MtMATE67 is activated by iron and is required for symbiotic nitrogen fixation in Medicago truncatula
Sugar Transporter STP7 Specificity for l-Arabinose and d-Xylose Contrasts with the Typical Hexose Transporters STP8 and STP12
The hexose transporters STP8 and STP12 may contribute to the nutrition of reproductive tissues, whereas the pentose-specific STP7 might be involved in cell wall sugar recycling in Arabidopsis.
Fine-Tuning of Photosynthesis Requires CURVATURE THYLAKOID1-Mediated Thylakoid Plasticity
The CURT1A component of the CURT1 protein complex mediates thylakoid membrane curvature and modulates photosynthesis to maintain plant fitness during fluctuating environmental conditions.
SIGNALING AND RESPONSE
The B-Box Domain Protein BBX21 Promotes Photomorphogenesis
The second B-box domain in BBX21 is essential for its direct binding of T/G-box cis-element present in the HY5 promoter, regulating HY5 and HY5-controlled gene expression, and promoting photomorphogenesis.
Transcriptomic Insights into Phenological Development and Cold Tolerance of Wheat Grown in the Field
Transcriptome profiling of spring and winter wheat and their near-isogenic lines growing under field conditions reveals the regulatory interactions between vegetative/reproductive transition and cold tolerance.
Sulforaphane Modifies Histone H3, Unpacks Chromatin, and Primes Defense
A plant secondary metabolite modifies chromatin, primes defense, and controls plant disease in Arabidopsis.
The sHSP22 Heat Shock Protein Requires the ABI1 Protein Phosphatase to Modulate Polar Auxin Transport and Downstream Responses
Endoplasmic reticulum-localized small heat shock protein sHSP22 integrates ABA and auxin signaling in Arabidopsis.
The G Protein β-Subunit, AGB1, Interacts with FERONIA in RALF1-Regulated Stomatal Movement
The G protein β-subunit, AGB1, interacts physically with receptor-like kinase FERONIA, and AGB1 plus extra-large Gα proteins and Gγ proteins participate in RALF1-FER regulation of stomatal movement.
The Deubiquitinase OTU5 Regulates Root Responses to Phosphate Starvation
The deubiquitinase OTU5 is required for the interpretation of environmental cues that alter the abundance of root hair- and chromatin-related proteins.
Heat Shock Factor HsfA1a Is Essential for R Gene-Mediated Nematode Resistance and Triggers H2O2 Production
HsfA1a is essential for Mi-1.2-mediated resistance to Meloidogyne incognita and regulates Wfi1 transcription and H2O2 production.
Control of Retrograde Signaling by Rapid Turnover of GENOMES UNCOUPLED1
New insights into the regulation of GUN1 uncover its function in early chloroplast biogenesis and suggest a role in developmental phase transitions.
A Poly(A) Ribonuclease Controls the Cellotriose-Based Interaction between Piriformospora indica and Its Host Arabidopsis
The elicitor-active cell wall moiety of the endophytic fungus Piriformospora indica, cellotriose, modulates the plant-fungus symbiosis by activating a poly(A) ribonuclease in Arabidopsis.
PROHIBITIN3 Forms Complexes with ISOCHORISMATE SYNTHASE1 to Regulate Stress-Induced Salicylic Acid Biosynthesis in Arabidopsis
A PROHIBITIN family protein promotes salicylic acid production via the isochorismate pathway in response to stress.
Hydrogen Sulfide Increases Production of NADPH Oxidase-Dependent Hydrogen Peroxide and Phospholipase D-Derived Phosphatidic Acid in Guard Cell Signaling
Lipopolysaccharides Trigger Two Successive Bursts of Reactive Oxygen Species at Distinct Cellular Locations
Lipopolysaccharides induce a long-lasting burst of reactive oxygen species that is largely associated with chloroplasts.
SYSTEMS AND SYNTHETIC BIOLOGY
Pausing of Chloroplast Ribosomes Is Induced by Multiple Features and Is Linked to the Assembly of Photosynthetic Complexes
Ribosome pausing in chloroplasts is caused by multiple features of mRNA and nascent peptide chain and influences transmembrane protein folding and cofactor integration.