Physiological and biochemical characteristic of a stripe mutant with abnormal flower organs in rice | 水稻条斑和颖花异常双突变体的生理生化特性监测
2009
Chen Dexi, Sichuan Agricultural University, Chengdu (China), Rice Research Institute | Ma Bingtian, Sichuan Agricultural University, Chengdu (China), Rice Research Institute | Wang Yuping, Sichuan Agricultural University, Chengdu (China), Rice Research Institute
[Objective] The experiment aimed to explore physiological and biochemical changes of leaves after plants were mutated. [Method] A rice double mutant with stripes on stems, leaves and spikelets were taken as experimental materials to study the enzyme activity changes in different growth stages and amino acid variation in rice. [Result] The SOD activity in mutant was higher than that in wild plant at tillering metaphase, but lower than that in wild type before heading stage and late flowering; the POD activity in three stages increased firstly then declined and the activity showed highest maximal activity at before heading stage. However,the POD activity in wild type showed the opposite change trend; the CAT activity presented degression at three stages, especially high at tillering metaphase, but reverse changes in wild type; the MDA activity decreased at three stages, but it was still higher than that in wild type, besides, the soluble sugar content of mutant was lower, but total amino acid content was increased.[Conclusion] The expression of mutant characteristics was correlated with SOD, POD, CAT and MDA activity changes and these changes made the mutant survive and rice quality change at last.
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