ORIGINAL RESEARCH
Resistance of Rye Seedlings to Drought and Freeze-Thaw Stress
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Yan Qu 1
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1
Key Laboratory of Groundwater Resources and Environment of the Ministry of Education (Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, 130012 China
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Environmental Monitoring Center Station of Jilin Province
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College of Instrumentation & Electrical Engineering, Jilin University, Changchun, China
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The Administration of Jingyu Water Conservation
CORRESPONDING AUTHOR
Guozhang Bao   

Key Laboratory of Groundwater Resources and Environment of the Ministry of Education(Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, 130012 China, China
Submission date: 2021-06-16
Final revision date: 2021-09-11
Acceptance date: 2021-09-27
Online publication date: 2022-01-21
Publication date: 2022-03-22
 
Pol. J. Environ. Stud. 2022;31(2):1559–1568
 
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ABSTRACT
The freeze-thaw (FT) and drought in early spring in Northeast China are two main ecological stresses to forage grasses. In this paper, Secale cereale L. grown under 2 d drought-stress (mild, moderate, and severe treat) with 5, 10 and 15% polyethylene glycol (PEG-6000) concentrations. The temperature gradient was set to 10, 5, 0, -5, 0, 5 and 10ºC after FT treatment. The content of protein, soluble sugar and MDA increased with a trend of combined stress>FT>drought stress, indicating that the damage of rye under single FT stress was higher than that under the single drought stress. Under drought stress, FT could aggravate the damage to rye. At T7 (10ºC) in the thawing stage, compared with the CK, the pattern of the decrease of RWC and chlorophyll and the increase of protein and MDA content was severe combined stress>FT>moderate combined stress>moderate drought stress. The results of this study showed that a proper drought treatment before FT stress could alleviate the physiological damage to the forage leaf.
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