Brassinosteroid improves resistance to phosphorus deficiency stress through regulating nutrient balance and reactive oxygen species scavenging in potato
文献类型： 外文期刊
第一作者： Guo, Xiaotong
作者： Guo, Xiaotong;Zhang, Shuhao;He, Yuhui;Teng, Yifan;Geng, Wenlong;Wang, Ziming;Chen, Lele;Yu, Chunyan;Zhang, Hongxia;Guo, Xiaotong;Zhang, Shuhao;Geng, Wenlong;Yu, Chunyan;Zhang, Hongxia;Gong, Lei;Guo, Xiaotong;Yu, Chunyan;Zhang, Hongxia;Qu, Ritao;Zhang, Hongxia
作者机构：
关键词： Brassinosteroid; Nutrient; Phosphorus; Potato; Stress; Reactive oxygen species
期刊名称：ENVIRONMENTAL AND EXPERIMENTAL BOTANY （ 影响因子：4.7； 五年影响因子：5.4 ）
ISSN： 0098-8472
年卷期： 2024 年 227 卷
页码：
收录情况： SCI
摘要： Brassinosteroid (BR) plays a crucial role in plant growth, development and response to abiotic stress. However, the mechanism by which BR regulates the response of potato plants to phosphorus deficiency stress is still largely unknown. In this work, the effects of BR on the growth of potato plants under phosphorus deficient condition were investigated. Exogenous BR application mitigated the growth inhibition caused by phosphorus deficiency stress. Transcriptomic analyses revealed that BR application altered the expression of genes involved in mitogenactivated protein kinase (MAPK) signaling pathway, plant hormone signal transduction, and nitrogen and phosphorus metabolisms under phosphorus deficient condition. Further gene ontology (GO) analysis indicated a significant enrichment of genes associated with reactive oxygen species scavenging process. Ectopic expression of potato brassinosteroid synthesis gene StCYP85A1 in Arabidopsis improved the resistance of transgenic plants to phosphorus deficiency stress, as indicated by the increased germination greening ratio and root growth. Quantitative real time PCR and antioxidant enzyme activity analysis revealed that ectopic expression of StCYP85A1 altered the expression of genes related to nitrogen and phosphorus metabolism, and promoted antioxidant enzyme activity in transgenic plants. These findings indicated that BR improved the tolerance of potato plants to phosphorus deficiency stress by regulating nutrient homeostasis and reactive oxygen species scavenging.
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