Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (19): 13-22.doi: 10.11924/j.issn.1000-6850.casb2020-0504

Special Issue: 生物技术 玉米 农业气象 烟草种植与生产

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SA Priming of Maize Seeds at Different Temperature Under Drought Stress: Effects on Seed Germination and Seedling Physiological Characteristics

Hou Linxin(), Lv Qiang, Huang Ming, Jiao Nianyuan, Yin Fei, Liu Ling, Lv Meng, Fu Guozhan()   

  1. College of Agriculture, Henan University of Science and Technology/Henan Dryland Agricultural Engineering Technology Research Center, Luoyang Henan 471023
  • Received:2020-09-27 Revised:2020-12-16 Online:2021-07-05 Published:2021-07-29
  • Contact: Fu Guozhan E-mail:1119315230@qq.com;gafu@haust.edu.cn

Abstract:

The aim is to investigate the effect of SA priming at different temperature on maize seed germination, growth and physiological characteristics of maize seedling under drought stress. The maize varieties ‘Zhengdan 958’, ‘Jingtian 808’ and ‘Jingkenuo 2000’ were used as materials, and five treatments including CK, 5, 10, 15 and 20℃ were designed to study the seedling growth performance under drought stress. The results showed that SA priming significantly enhanced the antioxidant enzyme activities, increased the content of osmotic regulatory substances, and decreased the content of MDA in maize seedling, alleviated the effects of drought stress on the growth of maize. Among them, the maize germination parameters (germination rate, germination potential, germination index and vigor index) of ‘Zhengdan 958’ and ‘Jingtian 808’ were the highest at 15℃ priming treatment, increased by 16.67%, 21.26%, 17.69%, 25.39% and 10.88%, 8.76%, 10.02%, 26.83%, respectively, compared with those of the control; while for ‘Jingkenuo 2000’, the priming temperature of 10℃, could achieve an increase of 16.48%, 10.73%, 14.27% and 32.00% compared with those of the control. In conclusion, seed priming can enhance the germination ability of maize seeds under drought stress, and the study could provide a theoretical basis for the application of seed priming to maize production in dryland.

Key words: maize, seed priming, salicylic acid, temperature, dehydration stress, drought stress

CLC Number: