Physiological effects of cutting on Secale cereale L. seedlings under freeze–thaw and alkaline salt stress

Secale cereale L. (rye) as an overwinter forage usually harvested in the autumn, widely grows in the northeastern China, where the temperature varies widely from day to night. In this area, the crop is confronted with not only freeze–thaw stress, but also the soil salinization. In this study, the ry...

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Bibliographic Details
Published in:Grassland science 2021-10, Vol.67 (4), p.299-305
Main Authors: Zhang, Mengyu, Bao, Guozhang, Yan, Bairu, Chang, Yixin, Tang, Wenyi, Qu, Yan, Guo, Jiancai
Format: Article
Language:English
Subjects:
alkaline salt
antioxidant enzyme
Antioxidants
Catalase
cold
Combined stress
Cutting
Cuttings
Enzymatic activity
Enzyme activity
Enzymes
freeze
Freeze-thawing
Malondialdehyde
Moisture content
osmotic stress
Peroxidation
Physiological effects
Physiology
Proteins
Regrowth
Rye
Salinization
Secale cereale
Seedlings
Soil salinity
Soil stresses
Superoxide dismutase
thaw
Water content
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Summary:Secale cereale L. (rye) as an overwinter forage usually harvested in the autumn, widely grows in the northeastern China, where the temperature varies widely from day to night. In this area, the crop is confronted with not only freeze–thaw stress, but also the soil salinization. In this study, the rye seedlings under alkaline salt (AS) stress were subjected to both cutting treatment (CT) after growing for 7 days and freeze–thaw (FT) stress（10/−5°C) after 6 days regrowth. The changes of soluble protein (SP), malondialdehyde (MDA), relative water content (RWC), catalase (CAT) and superoxide dismutase (SOD) activities in seedlings were studied to analyze the physiological effects of FT and AS stress with CT. The results indicated, under the combined stress, the enzyme activity and RWC decreased and the soluble protein and MDA content increased. Cutting treatment led to the accumulated of MDA, increase of enzyme activity and decrease of RWC in seedlings. The finding from the study indicates that the CT could aggravate the membrane peroxidation under the combined stress of FT and AS and enhance the osmotic adjustment ability of rye and activated the antioxidant enzyme system. The rye having been cut is more sensitive to the compound stress.
ISSN:1744-6961
1744-697X
DOI:10.1111/grs.12316