| Effects of high temperature and drought intergenerational effects on drought and salt tolerance of wheat at germination stage |
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| DOI：10.7606/j.issn.1000-7601.2024.02.19 |
| Key Words: wheat stress training trans\|generational effect drought tolerance salt tolerance |
| Author Name | Affiliation | | LI Gang | College of Agriculture, Shihezi University, The Key Laboratory of Oasis Eco\|agriculture, Xinjiang Production and Construction Groups, Shihezi, Xinjiang 832003, China | | WANG Bohan | College of Agriculture, Shihezi University, The Key Laboratory of Oasis Eco\|agriculture, Xinjiang Production and Construction Groups, Shihezi, Xinjiang 832003, China | | ZHANG Xuezhi | College of Agriculture, Shihezi University, The Key Laboratory of Oasis Eco\|agriculture, Xinjiang Production and Construction Groups, Shihezi, Xinjiang 832003, China | | LI Cheng | College of Agriculture, Shihezi University, The Key Laboratory of Oasis Eco\|agriculture, Xinjiang Production and Construction Groups, Shihezi, Xinjiang 832003, China | | LI Chunyan | College of Agriculture, Shihezi University, The Key Laboratory of Oasis Eco\|agriculture, Xinjiang Production and Construction Groups, Shihezi, Xinjiang 832003, China |
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| Abstract: |
| Wheat seeds ‘SDWW-7’, ‘Jinnong 6’ and ‘Jinshinong 1’ were harvested under high temperature stress (HT), post\|anthesis drought stress (DT) and normal irrigation (NW) in Turpan, Xinjiang, and the drought and salt tolerance of seeds harvested from three different environments were studied by simulating drought stress and salt stress with PEG-6000 and NaCl solution of different concentrations. The results were as follows: (1) The 1000-grain weight of male wheat decreased by 23.55%~46.15% under high temperature and drought stress，and the effects of high temperature and drought stress on starch content of ‘SDWW-7’ and ‘Jinshinong 1’ were different（P＜0.05）. (2) Under drought stress, ‘SDWW-7’, ‘Jinnong 6’ and ‘Jinshinong 1’ after heat acclimation grew better with average relative salt damage rate between 1.24% and 2.72%. (3) Under salt stress, the results showed that ‘SDWW-7’, ‘Jinnong 6’ and ‘Jinshinong 1’ had the best performance after high temperature training, ‘SDWW-7’>‘Jinnong 6’>‘Jinshinong 1’ showed the effect of two kinds of exercises on salt tolerance of offspring wheat. (4) The comprehensive evaluation of drought resistance of wheat progenies showed that under 15% PEG-6000(D1) and 20% PEG-6000(D2) drought stress, the progenies of ‘Jinnong 6’ and ‘Jinshinong 1’ harvested under DT environment had the best drought resistance and ranked 1st and 7th respectively. (5) The comprehensive evaluation of salt resistance of wheat progenies showed that under 50 mmol·L-1(S1) , 100 mmol·L-1(S2) , 200 mmol·L-1 (S3) salt stress, the salt resistance of wheat progenies was higher than that of wheat progenies, ‘SDWW-7’, ‘Jinnong 6’ and ‘SDWW-7’, which were harvested in HT environment, had the best salt tolerance, ranking 1,5 and 11, respectively. In conclusion, after high temperature and drought stress training, the progeny of wheat had a greater germination advantage when subjected to adversity stress, indicating the drought stress training of the paternal generation enhanced the drought resistance of the progeny, and the high temperature stress enhanced salt tolerance of progeny, which suggested that this effect could be passed on to the next generation and improve the resistance of progeny to stress. |
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