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Effect of Salt Stress on Growth and Physiological Properties of Asparagus Seedlings

文献类型： 外文期刊

作者： Guo, Xin 1 ; Ahmad, Naveed 1 ; Zhao, Shuzhen 1 ; Zhao, Chuanzhi 1 ; Zhong, Wen 2 ; Wang, Xingjun 1 ; Li, Guanghui 1 ;

作者机构： 1.Shandong Acad Agr Sci, Inst Crop Germplasm Resources, Shandong Prov Key Lab Crop Genet Improvement Ecol, Inst Biotechnol, Jinan 250100, Peoples R China

2.Shandong Seed Adm Stn, Jinan 250100, Peoples R China

关键词： asparagus; salt stress; growth; ion content; osmolyte; antioxidant enzyme activity

期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）

ISSN：

年卷期： 2022 年 11 卷 21 期

页码：

收录情况： SCI

摘要： Salt stress could inhibit the growth and development of crops and negatively affect yield and quality. The objective of this study was to investigate the physiological responses of different asparagus cultivars to salt stress. Twenty days old seedlings ofasalt-tolerant Apollo andasalt-sensitive cultivar JL1 were subjected to 0 (CK) and120 mM NaCl stress for 20 d. Their changes in growth, ion contents, antioxidant enzyme activities and gene expression were analyzed. Salt stress significantly inhibited the growth of both cultivars, and JL1 showed a greater decrease than Apollo. The root development of Apollo was promoted by 120 mM NaCl treatment. The Na+ content in roots, stems, and leaves of both cultivars was increased under salt stress, while K+ content and K+/Na+ decreased. The salt-tolerant cultivar Apollo showed less extent of increase in Na+ and decrease in K+ content and kept a relatively high K+/Na+ ratio to compare with JL1. The contents of proline, soluble sugar and protein increased in Apollo, while thesesubstances changed differently in JL1 under salt stress. Activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were gradually increased under salt stress in Apollo, while the corresponding enzyme activities in JL1 were decreased at the late stage of salt stress. The expression of SOD, POD, and CAT genes of both cultivars changed in a similar way to the enzyme activities. Malondialdehyde (MDA) content was increased slightly in Apollo, while increased significantly in JL1. At the late stage of salt stress, Apollomaintained a relatively high K+/Na+, osmotic adjustment ability and antioxidant defense capability, and therefore exhibited higher tolerance to salt stress than that of JL1.

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