Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (18): 125-130.doi: 10.11924/j.issn.1000-6850.2013-2940

Special Issue: 农业气象

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Resistance Evaluation and Response of Different Vigna radiata Varieties at Germination Stage to Drought Stress

  

  • Received:2013-11-10 Revised:2013-12-16 Online:2014-06-25 Published:2014-06-25

Abstract: The study analyzed the drought-resistance indexes of Vigna radiata at germination stage to provide theoretical basis for identifying drought resistance and screening V. radiate species. 15% PEG6000 was used to induce drought stress in the experiment.The germinating energy, germination rate, seed germ and root lengths were measured. The results showed that the germination rate, germination energy, germination index and vitality were markedly decreased.The length of embryonic root and embryonic bud also were decreased under drought stress. According to the relative germination rate, relative germination energy, relative embryonic bud length and relative embryonic root length, germination drought-resistance index and relative vitality index, varieties of V. radiata included three types with membership function method. The highdrought resistance was ‘Liangfeng 1’, ‘HX04037’, ‘Yulü 1’; the middle drought resistance were ‘Nenlü 1’, ‘Xinglü 1’, ‘Tianshandaminglü’, ‘Xilü 1’, ‘Lubao’, ‘Chilü 3’, ‘Bailü 1’, ‘Zhonglü 1’, ‘Jinlü 1’, ‘Babao’, ‘Zhonglü 6’, ‘Jibei12-1’, ‘Xinlü 1’, ‘HX04050’; the low drought resistance was ‘Lüzhenzhu 2’, ‘ZKY-2’, ‘Bailü 522’, ‘Hanlü 8’.Therefore, the germinating energy, germination rate, seed germ and root lengths can be used as an effective indicators for drought resistance identification at germination stage of V. radiata.