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《Chinese Journal of Rice Science》 1999-01
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Change of Oxygen Metabolism in Indica Type Dual-Purpose Genie Male Sterile Rice during Fertility Conversion

LI Meiru; LIU Hongxian; WANG Yirou; Li Ping; ZHANG Xu; LIN Daoxuan; HUANG Nongrong;ONG Qingni; LIU Yanzhuo(1)South China Institute of Botany, Chinese Academy of Sciences, Guangzhou 510650; 2)Rice Research Institute , Guangdong Academy of Agricultural Sciences, Guangzhou 510640)  
The indica type dual--purpose genie male sterile rice GDIS and N19S and the conventional rice cultivar Jingxian89 were used as experimental materials. Both GD1S and N19S sown under longday and high temperature conditions on the 1 -10 March were all sterile. In this time, contents of GSH (glutathione) and AsA (ascorbate) in flag leaves and panicles in various developmental stages or spikelet and anther at pollen ripening stage were all lower than those in Jingxian 89. GDIS andN19S sown under shortday and low temperature conditions on the 11 -- 20 July were fertile. In this time, the contents of GSHand AsA in various developmental stages were all higher than those in Jingxian 89. Activities of GR(glutathione reductase),AsA--POD(peroxidase) and SOD(superoxide dismutase) in the dual--purpose genie male sterile line during fertile stages werealso higher than those in Jingxian 89. POD activity in flag leaves in various developmental stages under two kinds of photoperiod and temperature were all higher than those in Jingxian 89, the POD activity were higher in fertile stage especially. Decreasing in active oxygen scavenging capacity may lead to imbalance of forming and scavenging of active oxygen and dysfunction of active oxygen metabolism. It is suggested that the abortion of the dual--purpose genie male sterile rice is associated withdecreasing in active oxygen scavenging capacity in cell.
【Fund】: 广东省自然科学基金
【CateGory Index】: S511.21
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