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Effects of Artificial Aging on Physiological Characteristics of Rice Seeds with Different Dormancy Characteristics

查看全文 作　　者：Dongdong [1,2]CAO;Shanyu [1]CHEN;Yutao [1]HUANG;Yebo [3]QIN;Guanhai [1]RUAN 高影响力作者 机构地区：[1]Institute of Crop and Nuclear Technology Utilization,Zhejiang Academy of Agricultural Science;[2]Huzhou Keao Seed Company Co.Ltd;[3]Zhejiang Planting Administration Bureau高影响力机构 出　　处：《Agricultural Biotechnology》索引2019年第8卷第1期,共5页高影响力期刊 基　　金：Supported by National Key Research and Development Project(2018YFD0101000) 摘　　要：In this study,two indica varieties with different dormancy characteristics [4 K58( II-32 B dormant),4 K59( II-32 B) ] and their F2 seeds( C178,C179) obtained through hybridization with sterile line( II-32 A) were used as materials. Different aged seeds( 0,3,6 and 9 d) of these four varieties were acquired by artificial accelerated aging method. Effects of artificial aging on malondialdehyde( MDA) content and catalase( CAT),ascorbate peroxidase( APX),peroxidase( POD) and superoxide dismutase( SOD) activity were investigated. The results showed that with the prolongation of aging time,MDA contents of these four rice varieties increased significantly,while the activity of antioxidant enzymes decreased dramatically. Besides,MDA contents and SOD,CAT and APX activity of the two inbred lines were significantly lower than those of the hybrid varieties. In addition,the activity of antioxidant enzymes in 4 K58 and C178 was significantly lower than that in 4 K59 and C179,respectively. This study indicated that artificial aging treatment significantly inhibited the activity of antioxidant system in seeds,improved membrane lipid peroxidation degree,and thus aggravated the deterioration of seeds. In addition,it also suggested that rice seeds with dormant property were more intolerant to storage. 关 键 词：Artificial ACCELERATED AGING Rice SEED PHYSIOLOGICAL characteristics DORMANCY
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