ArticleJournal of experimental botany2020
Suppressed ABA signal transduction in the spike promotes sucrose use in the stem and reduces grain number in wheat under water stress.
Article in Journal of experimental botany, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed, 43 citations in OpenAlex.
- Cultivar- and phase-specific effects of light on kernel number and compensation via kernel weight in wheat.Plant physiology · 2026Article
- High night temperature during the effective grain-filling stage affects maize yield and quality.Frontiers in plant science · 2026Article
- Genome-wide identification and characterization analysis ofFrontiers in plant science · 2025Article
- The Class III Peroxidase geneFrontiers in plant science · 2024Article
- Combined linkage analysis and association mapping identifies genomic regions associated with yield-related and drought-tolerance traits in wheat (Triticum aestivum L.).TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2023Article
- Coordination of carbon assimilation, allocation, and utilization for systemic improvement of cereal yield.Frontiers in plant science · 2023Review
- Genome-wide profiling of long noncoding RNAs involved in wheat spike development.BMC genomics · 2021Article
- Genome-Wide Association Study of Grain Number in Common Wheat From Shanxi Under Different Water Regimes.Frontiers in plant science · 2021Article
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Authors and funding
10 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Water stress is a primary trigger for reducing grain number per spike in wheat during the reproductive period. However, under stress conditions, the responses of plant organs and the interactions between them at the molecular and physiological levels remain unclear. In this study, when water stress occurred at the young microspore stage, RNA-seq data indicated that the spike had 970 differentially expressed genes, while the stem, comprising the two internodes below the spike (TIS), had 382. Abscisic acid (ABA) signal transduction genes were down-regulated by water stress in both these tissues, although to a greater extent in the TIS than in the spike. A reduction in sucrose was observed, and was accompanied by increases in cell wall invertase (CWIN) and sucrose:sucrose 1-fructosyl-transferase (1-SST) activities. Hexose and fructan were increased in the TIS but decreased in the spike. ABA was increased in the spike and TIS, and showed significant positive correlation with CWIN and 1-SST activities in the TIS. Overall, our results suggest that water stress induces the conversion of sucrose to hexose by CWIN, and to fructan by 1-SST, due to increased down-regulation of ABA signal transduction related-genes in the TIS; this leads to deficient sucrose supply to the spike and a decrease in grain number.
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