Effects of Salt Stress on the Antioxidant Activity and Malondialdehyde, Solution Protein, Proline, and Chlorophyll Contents of Three Malus Species

被引:53
作者
Wang, Dajiang [1 ,2 ]
Gao, Yuan [2 ]
Sun, Simiao [2 ]
Lu, Xiang [1 ,2 ]
Li, Qingshan [1 ,2 ]
Li, Lianwen [2 ]
Wang, Kun [2 ]
Liu, Jihong [1 ,3 ]
机构
[1] Shihezi Univ, Agr Coll, Xinjiang Prod & Construct Corps Key Lab Special Fr, Shihezi 832003, Peoples R China
[2] Chinese Acad Agr Sci CAAS, Res Inst Pomol, Key Lab Hort Crops Germplasm Resources Utilizat, Natl Repository Apple Germplasm Resources,Minist A, Xingcheng 125100, Peoples R China
[3] Huazhong Agr Univ, Coll Hort & Forestry Sci, Key Lab Hort Plant Biol MOE, Wuhan 430070, Peoples R China
来源
LIFE-BASEL | 2022年 / 12卷 / 11期
关键词
Malus seedlings; NaCl treatments; enzyme activity; membrane damage; osmotic regulation; GLYCINE BETAINE; ABIOTIC STRESS; SALICYLIC-ACID; GROWTH; LEAVES; PLANTS; ROLES; NACL; L; ACCUMULATION;
D O I
10.3390/life12111929
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Understanding the different physiological responses of Malus species under salt stress in the seedling stages will be useful in breeding salt-tolerant dwarfing apple rootstocks. Seedlings of Malus Zumi (Mats.) Rehd. (M. zumi), Malus sieversii (Led.) Roem. (M. sieversii), and Malus baccata (L.) Borkh. (M. baccata) were treated with solution of 0, 0.20%, 0.40%, and 0.60% salinity. Physiological parameters of their leaves and roots were measured at 0 d, 4 d, 8 d and 12 d after salinity treatments. Superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), malondialdehyde (MDA), solution protein (SP), and proline (PRO) initially increased and then decreased. The activities and contents of these parameters were higher in the 0.40% and 0.60% NaCl treatments than in the 0.20% treatment and in the 0% control. M. zumi was the most resistant to salt stress, showing the lowest content of MDA in the leaves and roots, which increased slightly under salt stress. M. baccata had the highest increase in both the content and proportion of MDA. High enzyme activity was shown to play an important role in the salt resistance of M. zumi. Moreover, it can be speculated that there are other substances that also play a major role. We found that osmotic regulation played a key role in response to salt stress for M. baccata even though it was sensitive to salt stress. For M. sieversii, both the osmotic regulation and enzymatic antioxidants were observed to play a major role in mitigating salt stress.
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页数:18
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