What question did this study set out to answer?

To determine how pre-reproductive drought stress affects nitrogen availability, polyamine metabolism, and grain formation in winter wheat.

October 5, 2023Journal of Experimental BotanyOpen Access

Polyamines mediate the inhibitory effect of drought stress on nitrogen reallocation and utilization to regulate grain number in wheat

View Full Paper

Ask AI

Bookmark

Authors

JLJuan LiKunming University of Science and Technology QLQi LiHuazhong Agricultural University GNGuo NianHainan University

Discussion

Member takes

Implication

Experimental study reveals that polyamine regulation of nitrogen allocation maintains grain number in drought-stressed wheat, suggesting spermidine can mitigate climate-induced yield loss.

Key Points

To determine how pre-reproductive drought stress affects nitrogen availability, polyamine metabolism, and grain formation in winter wheat.
Exposed winter wheat plants to pre-reproductive and continuous drought stress conditions.
Performed transcriptome profiling alongside biochemical analyses of nitrogen accumulation, amino acid enzyme activity, and endogenous polyamine levels.
Evaluated the restorative effect of exogenous spermidine application on nitrogen distribution and spike grain count.
Drought stress down-regulated polyamine synthase genes and up-regulated catabolic genes, lowering endogenous spermidine and putrescine while decreasing fertile florets and grain numbers.
Inhibition of amino acid biosynthesis and catabolism enzymes under drought led to abnormal accumulation of free amino acids in young spikes despite preferential nitrogen allocation to spike development.
Exogenous spermidine optimized nitrogen partitioning between leaves and young spikes, markedly alleviating drought-induced reductions in grain count per spike.

Cite This Study

Li et al. (2023) studied this question.

synapsesocial.com/papers/6a95a7c9845504197e1d20ef https://doi.org/10.1093/jxb/erad393

View Full Paper

Ask AI

Bookmark

Implication

Experimental study reveals that polyamine regulation of nitrogen allocation maintains grain number in drought-stressed wheat, suggesting spermidine can mitigate climate-induced yield loss.

Polyamines mediate the inhibitory effect of drought stress on nitrogen reallocation and utilization to regulate grain number in wheat

Discussion

Member takes

Implication

Key Points

Cite This Study

Polyamines mediate the inhibitory effect of drought stress on nitrogen reallocation and utilization to regulate grain number in wheat

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider