Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (24): 37-41.doi: 10.11924/j.issn.1000-6850.casb15040197

Special Issue: 小麦

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Flag Leaf Senescence Characteristic of Different Wheat Varieties (Lines) Under Salt Stress

XueYuansai, MengXianghao, LiuYiguo, ZhangYumei, Lin Qi   

  1. (College of Agronomy and Plant Protection, Qingdao Agricultural University/Shandong Provincial Key Laboratory of Dry Farming Techniques, Qingdao Shandong 266109)
  • Received:2015-04-27 Revised:2015-05-08 Accepted:2015-05-25 Online:2015-08-26 Published:2015-08-26

Abstract: In order to study the effect of salt stress on the flag leaf senescence characteristic of different wheat varieties (lines), the author selected 7 wheat varieties (lines) and analyzed the flag leaf senescence index in saline-alkali soil. The results showed that SOD, POD, MDA and free PRO content were significantly different in different wheat varieties under salt stress with the growth of wheat, however, the variation degrees were different, MDA and free PRO content increased with different degrees, the increase ranges of MDA in flag leaf of ‘Qingmaiw04’, ‘Qingmai6’ and ‘Dekang961’ were smaller, but the increase range of PRO was bigger. The SOD activity decreased in different ranges, the SOD activity of the flag leaf in ‘Qingmaiw04’, ’Qingmai6’ and ‘Dekang961’ decreased in a small degree after anthesis. The POD activity showed an ‘increase-decline’ trend, the POD activity in flag leaves of ‘Qingmaiw04’, ‘Qingmai6’ and ‘Dekang961’ decreased in a lower speed after 14 days of anthesis. Aging degrees of ‘Qingmaiw04’, ’Qingmai6’ and ‘Dekang961’ were relatively lower while the salt tolerance ability were better under salt stress.