Abstract

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Title:: Effect of Simulated Preharvest Deterioration Stress on Plant Growth and Seed Vigor of Spring Soybean at Physiological Maturity Stage

Author(s):: ?SHU Ying-jie¹; 2; ZHOU Yu-li¹; TAO Yuan²; WANG Shuang²; YANG Yan²; ZHANG Guo-min²; MA Hao²; ?1.Anhui Science and Technology University,Fengyang 233100,China; 2.State key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University,Nanjing 210095,China

Keywords:: Spring soybean; High temperature and high humidity; Preharvest seed deterioration; Seed vigor index

Abstract:: ?Pre-harvest seed deterioration resistant soybean cv. Xiangdou 3 and preharvest seed deteriorationsensitive soybean cv. Ningzhen 1 were used to study the effect of high temperature and high humidity stress(40℃/30℃,100%/70% humidity(RH),and 10 h/14 h cycle(light/dark)for 5,10,16,24,48,96 and 168 h,respectively)on plant growth and seed vigor indexes of spring soybean at physiological maturity stage.The results showed that pod and stem leaf mass growth of Xiangdou 3 and Ningzhen 1 had no significant difference at the short time(<24 h)stress,while,when the stress time exceeded 48 h,the growth of pod and stem leaf of Ningzhen 1 were restrained more serious than Xiangdou 3.The germination energy,germination percentage,simple vigor index,dehydrogenase activity and acid phosphatase activity of Xiangdou 3 and Ningzhen 1,compared with control,were reduced with high temperature and high humidity stress,and the reduce extent increased with the strees time elongation,on the whole,the tested indexes of preharvest seed deteriorationsensitive soybean cv. Ningzhen 1 were reduced more seriously than those of preharvest seed deteriorationresistant soybean cv. Xiangdou 3.