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

作     者：Dongdong CAO Shanyu CHEN Yutao HUANG Yebo QIN Guanhai RUAN 

作者机构：Institute of Crop and Nuclear Technology UtilizationZhejiang Academy of Agricultural Science Huzhou Keao Seed Company Co.Ltd Zhejiang Planting Administration Bureau 

出 版 物：《Agricultural Biotechnology》 (农业生物技术（英文版）)

年 卷 期：2019年第8卷第1期

页      面：52-56页

学科分类：09[农学] 

基　　金：Supported by National Key Research and Development Project(2018YFD0101000) 

主　　题：Artificial accelerated aging Rice Seed Physiological characteristics Dormancy 

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.