Pre-drought priming sustains grain development under post-anthesis drought stress by regulating the growth hormones in winter wheat (Triticum aestivum L.)

Planta
Muhammad AbidTing-Bo Dai

Abstract

Drought stress during grain filling is the most yield-damaging to wheat. Pre-drought priming facilitated the wheat plants to sustain grain development against the post-anthesis drought stress by modulating the levels of growth hormones. Post-anthesis drought stress substantially reduces grain yield in wheat (Triticum aestivum L.) due to impaired grain development associated with imbalanced levels of growth hormones. To investigate whether pre-drought priming could sustain grain development in wheat by regulating favorable levels of growth hormones under post-anthesis drought conditions, the plants of a drought-sensitive (Yangmai-16) and drought-tolerant (Luhan-7) wheat cultivar were exposed to a moderate drought stress during tillering (Feekes 2 stage) for priming, and then, a subsequent severe drought stress was applied from 7 to 14 days after anthesis. The results showed that drought-stressed plants of both cultivars showed a decline in flag leaf water potential, chlorophyll contents, photosynthetic rate, grain size initiation, and grain filling as compared to well-watered plants; however, decline in these traits was less in pre-drought primed (PD) plants than in nonprimed (ND) plants. Under drought stress, the PD plants regu...Continue Reading

References

Dec 1, 1990·Plant Physiology·P W MorganM P De Proft
Mar 23, 2011·Plant Science : an International Journal of Experimental Plant Biology·Chengyong LiWeixing Cao
Apr 14, 2011·Plant, Cell & Environment·Nobuhiro SuzukiGad Miller
May 30, 2013·Proceedings of the National Academy of Sciences of the United States of America·Annelein MeisnerWim H van der Putten

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Citations

Jul 6, 2018·Plant, Cell & Environment·Margarete BaierJörn van Buer
Jul 11, 2020·International Journal of Molecular Sciences·Bartosz JabłońskiAnna Nadolska-Orczyk

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Methods Mentioned

BETA
dissection

Software Mentioned

Analyst and Multi Quant
SPSS
Sigma Plot
Smart Grain

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