eXtra Botany
Insight
Sodium fluxes and silicon at the root plasma membrane: a paradigm shift?
This article comments on:
Flam-Shepherd R, Huynh WQ, Coskun D, Hamam AM, Britto DT, Kronzucker HJ. 2018. Membrane fluxes, bypass flows, and sodium stress in rice: the influence of silicon. Journal of Experimental Botany 69, 1679–1692.
DARWIN REVIEW
The evolutionary origins of cell type diversification and the role of intrinsically disordered proteins
We review the evidence that intrinsically disordered proteins played a pivotal role in the evolution of cell type specialization and multicellularity across all major eukaryotic clades.
FLOWERING NEWSLETTER REVIEW
MADS-box genes and crop domestication: the jack of all traits
MADS-box genes are major domestication genes involved in a plethora of developmental processes. They might be ideally suited for future targeted breeding efforts.
RESEARCH PAPERS
Cell Biology
Glucose triggers stomatal closure mediated by basal signaling through HXK1 and PYR/RCAR receptors in Arabidopsis
Glucose-triggered stomatal closure is dependent on basal ABA signaling through PYR/RCAR receptors, CDPK6, and glucose signaling mediated by hexokinase1 (HXK1) in Arabidopsis.
Crop Molecular Genetics
The C–S–A gene system regulates hull pigmentation and reveals evolution of anthocyanin biosynthesis pathway in rice
The C–S–A gene system determines rice hull pigmentation. A conserved color-producing model reveals the independent origin and evolution of the anthocyanin biosynthesis pathway in rice.
Exploring DNA variant segregation types in pooled genome sequencing enables effective mapping of weeping trait in Malus
Identifying and exploiting three informative DNA variant segregation types in pooled genome sequencing analysis of the weeping phenotype in Malus empowers an effective genetic mapping strategy in out-crossing woody species.
Contrasting genetic regulation of plant development in wild barley grown in two European environments revealed by nested association mapping
Plant development in a barley nested association mapping population is controlled by interacting genotypic (wild donor alleles) and environmental (geographical location) effects.
Overexpression of miR164b-resistant OsNAC2 improves plant architecture and grain yield in rice
Plant architecture affects grain yield. Overexpressing a version of OsNAC2 resistant to miRNA-mediated degradation increased panicle number and grain yield under field conditions, identifying a new strategy to improve yield.
Potato late blight field resistance from QTL dPI09c is conferred by the NB-LRR gene R8
Using genetics, genomics, and diagnostic RenSeq, we demonstrate that the major NB-LRR gene R8 explains the field resistance against potato late blight in the QTL dPI09c
Growth and Development
Interference with Clp protease impairs carotenoid accumulation during tomato fruit ripening
The stromal Clp protease complex influences chromoplast differentiation and ensures proper carotenoid metabolism during tomato fruit ripening, probably in co-ordination with plastidial chaperones.
A leu-rich repeat receptor-like protein kinase, FaRIPK1, interacts with the ABA receptor, FaABAR, to regulate fruit ripening in strawberry
A leucine-rich repeat receptor-like kinase in strawberry, FaRIPK1, interacts with a putative ABA receptor, FaABAR, and forms a newly identified ABA signaling pathway involved in the regulation of fruit ripening.
Integrative analysis of the late maturation programme and desiccation tolerance mechanisms in intermediate coffee seeds
Integrative analysis of developing coffee seeds reveals the key cellular, metabolic, and regulatory processes associated with acquisition of desiccation tolerance in intermediate seeds
Delayed pollination and low availability of assimilates are major factors causing maize kernel abortion
Manually delaying pollination in maize restricted kernel growth and induced abortion by suppressing cell wall invertase activity and repartitioning assimilates.
The Arabidopsis COPII components, AtSEC23A and AtSEC23D, are essential for pollen wall development and exine patterning
Two of the Arabidopsis thaliana SEC23 homologs, AtSEC23A and AtSEC23D, are expressed in the tapetum and play essential roles in pollen wall formation, exine patterning, and tapetum development.
Distinct gibberellin functions during and after grapevine bud dormancy release
Gibberellin has an inhibitory effect during initial activation of dormant grapevine buds, and at this stage its level is down-regulated. At a later stage, gibberellin level increases and enhances bud regrowth.
Photosynthesis and Metabolism
Biosynthesis of quebrachitol, a transportable photosynthate, in Litchi chinensis
We report the involvement of quebrachitol in photosynthate transport and stress response, and characterize an inositol methyltransferase gene involved in the biosynthesis of bornesitol, the methylated intermediate of quebrachitol.
SmJAZ8 acts as a core repressor regulating JA-induced biosynthesis of salvianolic acids and tanshinones in Salvia miltiorrhiza hairy roots
SmJAZ8 regulates the biosynthesis of salvianolic acids and tanshinones simultaneously by repressing the transcription factors and biosynthetic pathway genes in Salvia miltiorrhiza hairy roots.
Plant—Environment Interactions
Membrane fluxes, bypass flows, and sodium stress in rice: the influence of silicon
Silicon reduces rice shoot sodium accumulation by blocking transpirational bypass flow or increasing shoot growth, but does not affect transmembrane Na+ fluxes or the rapid Na+ influx–efflux cycle in roots.
Commercial hybrids and mutant genotypes reveal complex protective roles for inducible terpenoid defenses in maize
Targeted metabolomics, analyses of commercial hybrids, and mutant genotypes infected with diverse pathogenic fungi reveal dynamic roles for sesqui- and diterpenoid phytoalexins in maize defense.
Post-silking carbon partitioning under nitrogen deficiency revealed sink limitation of grain yield in maize
Anatomical, physiological, and molecular analysis revealed that yield losses in nitrogen-deficient maize were more closely associated with limited capacity of sugar utilization in developing ears than sucrose export from leaves.
Effect of high night temperature on storage lipids and transcriptome changes in developing seeds of oilseed rape
High night temperature lowers the total fatty acids of seed and increases the proportion of 18-carbon unsaturated fatty acids by enhancing gibberellin signaling and the activity of the genes involved in fatty acid catabolism.
Scopoletin 8-hydroxylase: a novel enzyme involved in coumarin biosynthesis and iron-deficiency responses in Arabidopsis
A strongly iron-responsive gene of previously unknown function, At3g12900, encodes a scopoletin 8-hydroxylase involved in coumarin biosynthesis, and plays an important role in the iron uptake strategy of Arabidopsis.
The GARP/MYB-related grape transcription factor AQUILO improves cold tolerance and promotes the accumulation of raffinose family oligosaccharides
The stress-responsive AQUILO gene regulates the expression of GoLS genes and improves cold tolerance in association with the increase of raffinose family oligosaccharides.
Genome scan identifies flowering-independent effects of barley HsDry2.2 locus on yield traits under water deficit
The wild barley HsDry2.2 allele confers a reproductive advantage that is independent of flowering time under drought conditions and is manifested through modifications in shoot morphology, reduced senescence, and longer grain filling.
Arabidopsis plants exposed to dioxin result in a WRINKLED seed phenotype due to 20S proteasomal degradation of WRI1
Arabidopsis exposed to dioxin pollutants led to wrinkled seeds with reduced oil content, due to increased expression of 20S proteasome components and substantial degradation of the transcription factor WRI1.
Screening Arabidopsis thaliana mutants for low sensitivity to manganese identifies novel alleles of NRAMP1 and PGSIP6
Screening Arabidopsis mutants for sensitivity to low-Mn conditions identifies novel alleles for NRAMP1, a previously known Mn transporter, and PGSIP6, a phosphorylceramide glucuronosyltransferase.
Genome-wide association study uncovers a novel QTL allele of AtS40-3 that affects the sex ratio of cyst nematodes in Arabidopsis
Crop yield losses are influenced by the sex ratio of cyst nematodes. Expression of an Arabidopsis senescence-associated gene (AtS40-3) is positively associated with female-biased cyst nematode sex ratio.
CORRIGENDA
Corrigendum: Map-based cloning and characterization of BPH29, a B3 domain-containing recessive gene conferring brown planthopper resistance in rice
Corrigendum: Disruption of OsSEC3A increases the content of salicylic acid and induces plant defense responses in rice
Corrigendum: Towards recommendations for metadata and data handling in plant phenotyping
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Cover Image
Cover Image
Cover illustration: Tomato (Solanum lycopersicum) fruit halves illuminated with ultraviolet light. Tomato fruits undergo profound metabolic changes during ripening. Green fruits lose their chlorophyll and accumulate large amounts of health-promoting carotenoid pigments such as lycopene and pro-vitamin A beta-carotene, eventually acquiring their characteristic red colour when ripe. Ripening involves the differentiation of chloroplasts into carotenoid-accumulating chromoplasts. In this issue, D’Andrea et al. pp. 1557–1568 report the identification of specific proteases and chaperones that control the differentiation of chromoplasts and the accumulation of active carotenoid biosynthetic enzymes in tomato fruit. Image by Miguel Simon-Moya and Manuel Rodriguez-Concepcion. - Front Matter
- Table of Contents