WEI Yan-xia
Guangdong Key Laboratory of Biotechnology for Plant Development, School of Life Science, South China Normal University, Guangzhou 510631, ChinaLU Li-na
Guangdong Key Laboratory of Biotechnology for Plant Development, School of Life Science, South China Normal University, Guangzhou 510631, ChinaPENG Chang-lian
Guangdong Key Laboratory of Biotechnology for Plant Development, School of Life Science, South China Normal University, Guangzhou 510631, ChinaSchool of Life Science,South China Normal University,School of Life Science,South China Normal University,Guangdong Key Laboratory of Biotechnology for Plant Development,School of Life Science,South China Normal University;China
The effects of exogenous ascorbic acid (AsA) and methy jasmonate (MeJA) on rice (Oryza sativa) leaf senescence induced by ethephon was investigated using wild type of cultivar line Zhonghua 11(ZH-11) and the mutant line GI-2 with down-regulated GLDH gene,which GLDH was a key enzyme in AsA biosynthesis path.The results showed that exogenous AsA increased ascorbic acid content in GI-2.Likewise,the contents of Rubisco protein and chlorophyll contents increased significantly after treated by AsA,and the descending rate of photosynthetic parameters decreased,while AsA treatment had no significant effects on ZH-11.In both cultivars,MeJA significantly decreased the contents of ascorbic acid,Rubisco protein and chlorophyll after treatment,while increased the descending rate of photosynthetic parameters,and had a stronger effect on ZH-11 than GI-2.Therefore,it was demonstrated that exogenous AsA plays an effective role in alleviating the early-senescence of rice leaf induced by ethephon,while MeJA has the opposite effects.
魏燕霞,陆俐娜,彭长连.外源施加AsA和MeJA对乙烯利诱导水稻叶片衰老的影响[J].热带亚热带植物学报,2017,25(4):348~356
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