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Significance of brassinosteroids and their derivatives in the development and protection of plants under abiotic stress
Biologia ( IF 1.4 ) Pub Date : 2021-08-10 , DOI: 10.1007/s11756-021-00853-3
Khwaja Salahuddin Siddiqi 1 , Azamal Husen 2
Affiliation  

Brassinosteroids have been identified as polyhydroxylated steroidal plant hormones which are known for their response against stress and development processes like flowering, germination and crop production. Because of their multiple properties, brassinosteroids occupy a significant place among hormones. These naturally occurring plant hormones induce tolerance against abiotic and biotic stresses such as temperature variation (extreme cold/hot), salinity, water scarcity or drought, injury, fungal infection and metal toxicity. As a result of these stresses free radicals, like superoxide ions and peroxide are produced which cause damage to the plant system. Exogenous application of brassinosteroids at appropriate time can save plants from oxidative stresses. Brassinosteroids enhance carbon dioxide assimilation capacity, chlorophyll contents, antioxidants including ascorbate, carotenoids and proline under adverse environmental conditions. Besides inducing resistance against stresses, brassinosteroids also regulate growth, increase seed germination and ripening of fruits. It has been also noticed that the brassinazole-resistant-dependent brassinosteroid signaling up-regulates the expression of autophagy-related genes and autophagosome formation under stress. We have summarized, in this review, the information available until 2021, the impact of BRs application on plant growth and development under abiotic stress.



中文翻译:

油菜素内酯及其衍生物在非生物胁迫下植物发育和保护中的意义

油菜素类固醇已被确定为多羟基化甾体植物激素,因其对压力和发育过程(如开花、发芽和作物生产)的反应而闻名。由于其多种特性,油菜素类固醇在激素中占有重要地位。这些天然存在的植物激素诱导对非生物和生物胁迫的耐受性,例如温度变化(极冷/极热)、盐度、缺水或干旱、损伤、真菌感染和金属毒性。由于这些压力,会产生自由基,如超氧离子和过氧化物,从而对植物系统造成损害。在适当的时候外源施用油菜素类固醇可以使植物免受氧化胁迫。油菜素类固醇可增强二氧化碳同化能力、叶绿素含量、抗坏血酸、类胡萝卜素和脯氨酸等抗氧化剂在不利的环境条件下。除了诱导抗逆性外,油菜素类固醇还能调节生长、促进种子发芽和果实成熟。人们还注意到,油菜素抗性依赖的油菜素类固醇信号在压力下上调了自噬相关基因的表达和自噬体的形成。在这篇综述中,我们总结了到 2021 年可用的信息,BRs 应用对非生物胁迫下植物生长和发育的影响。人们还注意到,油菜素抗性依赖的油菜素类固醇信号在压力下上调了自噬相关基因的表达和自噬体的形成。在这篇综述中,我们总结了到 2021 年可用的信息,BRs 应用对非生物胁迫下植物生长和发育的影响。人们还注意到,油菜素抗性依赖的油菜素类固醇信号在压力下上调了自噬相关基因的表达和自噬体的形成。在这篇综述中,我们总结了到 2021 年可用的信息,BRs 应用对非生物胁迫下植物生长和发育的影响。

更新日期:2021-08-10
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