Physiological Response to Osmotic Stress at Seedling Stage of Wheat Cultivars from Different Periods in Henan Province

doi:10.7668/hbnxb.2016.06.019

Abstract

Abstract: Eleven representative wheat varieties from 1960s to now were selected to explore the evolution of wheat varieties of Henan Province under drought stress.At two-leaf stage,the drought stress was carried out by 20%-PEG6000(m/V) for 48,120 h,and the physiological drought resistance of different cultivars at seedling stage was analyzed by fuzzy subordinate function of each index.The results indicated that drought stress presented an increasing trend in the nine times of wheat variety upgrading in Henan Province.Under drought stress,relative water content and chlorophyll were reduced,while SOD and POD activity kept rising.Clustering analysis indicated that the 11 cultivars could be classified as four types:highly resistant type (Luohan 2 and Luohan 12);drought resistant type (Zhengmai 9023,Yumai 21,Yumai 49-198 and Zhoumai 18),weakly resistant type (Yumai 18,Zhengmai 366 and Fengchan 3) and highly sensitive type (Bainong 3217 and Zhengyin 1).The performance of drought resistance in 11 wheat varieties was Luohan 2 > Luohan 12 > Zhengmai 9023 > Yumai 21 > Yumai 49-198 > Zhoumai 18 > Yumai 18 > Zhengmai 366 > Fengchan 3 > Bainong 3217 > Zhengyin 1.

Key words: Wheat, Seedling stage, Drought resistance, Physiological response

CLC Number:

S512.01

ZHANG Pengyu, WEI Li, BAI Tiantian, ZHANG Baona, YANG Mingda, HAN Jingli, GUAN Xiaokang, WANG Tongchao. Physiological Response to Osmotic Stress at Seedling Stage of Wheat Cultivars from Different Periods in Henan Province[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(6): 119-124. doi: 10.7668/hbnxb.2016.06.019.

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