Spermidine alleviates drought-induced wheat floret degeneration by mitigating oxidative damage and maintaining energy homeostasis
文献类型： 外文期刊
第一作者： Li, Juan
作者： Li, Juan;Li, Gege;Li, Zhiyuan;Li, Jiayu;Xiao, Jianke;Liu, Yang;Li, Juan;Nangia, Vinay
作者机构：
关键词： Drought stress; Polyamines; Grain number; Amino acid; Carbohydrate metabolism
期刊名称：CROP JOURNAL （ 影响因子：5.6； 五年影响因子：6.0 ）
ISSN： 2095-5421
年卷期： 2024 年 12 卷 6 期
页码：
收录情况： SCI
摘要： Drought stress at the booting stage causes severe floret degeneration and a decrease in grain number. Polyamines are involved in wheat floret development under drought stress, but the underlying physiological mechanisms are unclear. This study showed that drought-induced accumulation of reactive oxygen species led to wheat spikelet cell apoptosis and floret degeneration. Drought induced stomatal closure to reduce photosynthesis, then inhibited the activities of sucrose phosphate synthase, sucrose synthetase (cleavage direction) and ADP-glucose pyrophosphorylase in spikes and leaves, and soluble vacuolar invertase and cell wall invertase in spikes, thus providing a poor nutrient base for floret development. Exogenous spermidine application increased antioxidant enzyme activities and polyamine metabolism, promoted starch and sucrose metabolism, amino acid utilization and increased the levels of glycolytic and tricarboxylic acid cycle intermediates to mitigate oxidative damage and maintain energy homeostasis in the spike, thereby reducing floret degeneration and increasing grain number. (c) 2024 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NCND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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