Effect of polyamines on the grain filling of wheat under drought stress

Plant Physiology and Biochemistry : PPB
Yang LiuYuncheng Liao

Abstract

Drought inhibits wheat grain filling. Polyamines (PAs) are closely associated with plant resistance due to drought and grain filling of cereals. However, little is known about the effect of PAs on the grain filling of wheat under drought stress. This study investigated whether and how PAs are involved in regulating wheat grain filling under drought stress. Two wheat genotypes differing in drought resistance were used, and endogenous PA levels were measured during grain filling under different water treatments. Additionally, external PAs were used, and the variation of hormone levels in grains was measured during grain filling under drought stress. The results indicated that spermidine (Spd) and spermine (Spm) relieve the inhibition caused by drought stress, and putrescine (Put) has the opposite effect. The higher activities of S-adenosylmethionine decarboxylase and Spd synthase in grains promotes the synthetic route from Put to Spd and Spm and notably increases the free Spd and Spm concentrations in grains, which promotes grain filling and drought resistance in wheat. The effect of PA on the grain filling of wheat under drought stress was closely related to the endogenous ethylene (ETH), zeatin (Z) + zeatin riboside (ZR) and ab...Continue Reading

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Citations

Mar 12, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Nemat HassanAlshafei Aljaarany
Jul 28, 2020·International Journal of Molecular Sciences·Tao WangRenhai Peng
Sep 27, 2018·Environmental Science and Pollution Research International·Irshad AhmadQingfang Han
Oct 12, 2017·Frontiers in Plant Science·Cui-Cui YinJin-Song Zhang
Sep 5, 2019·Plants·Konstantinos PaschalidisJi-Hong Liu
Aug 18, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Zahra KhazaeiAsghar Estaji
Mar 7, 2021·International Journal of Molecular Sciences·Judit BányaiGyula Vida

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