特定胁迫处理导致水稻细胞色素c氧化酶氧化还原状态的改变。
Modification of the redox state of cytochrome c oxidase of rice due to certain stress treatments.
作者信息
Dhage A R, Desai B B, Naik R M, Munjal S V, Naik M S
机构信息
Department of Biochemistry, Mahatma Phule Krishi Vidyapeeth, Rahur, Maharashtra, India.
出版信息
Indian J Biochem Biophys. 1992 Oct;29(5):425-7.
The redox state of cytochrome alpha 3 during in situ respiration of leaves of 20-day-old rice seedlings was assessed by in vivo aerobic assay of nitrate reductase, after 1 min exposure to carbon monoxide. Different stress treatments like water and salt stresses, disintegration of leaf tissues and darkness modified the redox state of cytochrome c oxidase. The dark treatment altered the redox state of cytochrome oxidase from reduced to the oxidized state, as judged by its reaction with CO in CO-sensitive rice cultivar. The water and salt stresses as well as the disintegration of leaf tissue on the contrary altered cytochrome oxidase from the oxidized to its reduced state in CO-insensitive cultivars; probably by changing the cellular integrity, turgidity and structure of mitochondrial membrane, and also due to decreased mitochondrial energization.
在暴露于一氧化碳1分钟后，通过体内硝酸还原酶需氧测定法评估20日龄水稻幼苗叶片原位呼吸过程中细胞色素α3的氧化还原状态。不同的胁迫处理，如水胁迫和盐胁迫、叶片组织解体和黑暗，改变了细胞色素c氧化酶的氧化还原状态。黑暗处理使细胞色素氧化酶的氧化还原状态从还原态变为氧化态，这是通过其在对一氧化碳敏感的水稻品种中与一氧化碳的反应判断的。相反，在对一氧化碳不敏感的品种中，水胁迫和盐胁迫以及叶片组织解体使细胞色素氧化酶从氧化态变为还原态；这可能是通过改变细胞完整性、线粒体膜的膨压和结构，也可能是由于线粒体能量供应减少所致。
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