活性氧
镉
化学
细胞生物学
氧化应激
战斗或逃跑反应
脂质积聚
氧气
生物物理学
生物化学
生物
基因
有机化学
作者
Wenzhen Chen,Peixian Zhang,Di Liu,Xiaozhuo Wang,Sen Lu,Zhixuan Liu,Mingkang Yang,Tenghaobo Deng,Liang Chen,Hua Qi,Shi Xiao,Qinfang Chen,Rongliang Qiu,Lijuan Xie
标识
DOI:10.1016/j.jhazmat.2024.135702
摘要
Lipid remodeling is crucial for various cellular activities and the stress tolerance of plants; however, little is known about the lipid dynamics induced by the heavy metal cadmium (Cd). In this study, we investigated the phospholipid profiles in rice (Oryza sativa) under Cd exposure. We observed a significant decline in the total amounts of phosphatidylcholine and phosphatidylserine, contrasted with an elevation in phosphatidic acid (PA) due to Cd stress. Additionally, Cd stress prompted the activation of phospholipase D (PLD) and induced the expression of PLDα1. OsPLDα1 knockout mutants (Ospldα1) showed increased sensitivity to Cd, characterized by a heightened accumulation of hydrogen peroxide in roots and diminished PA production following Cd treatment. Conversely, PLDα1-overexpressing (OsPLDα1-OE) lines demonstrated enhanced tolerance to Cd, with suppressed transcription of the respiratory burst oxidase homolog (Rboh) genes. The transcription levels of genes associated with Cd uptake and transport were accordingly modulated in Ospldα1 and OsPLDα1-OE plants relative to the wild-type. Taken together, our findings underscore the pivotal role of OsPLDα1 in conferring tolerance to Cd by modulating reactive oxygen species homeostasis and lipid remodeling in rice.
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