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Transcriptome and Metabolome Analysis Reveals Salt-Tolerance Pathways in the Leaves and Roots of ZM-4 (Malus zumi) in the Early Stages of Salt Stress

文献类型： 外文期刊

作者： Wang, Dajiang 1 ; Wang, Kun 2 ; Sun, Simiao 2 ; Yan, Peng 3 ; Lu, Xiang 1 ; Liu, Zhao 1 ; Li, Qingshan 1 ; Li, Lianwen 2 ; Gao, Yuan 2 ; Liu, Jihong 1 ;

作者机构： 1.Shihezi Univ, Agr Coll, Xinjiang Prod & Construction Corps Key Lab Special, 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, Xingcheng 125100, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Hort Crops, 403 Nanchang Rd, Urumqi 830091, Peoples R China

4.Huazhong Agr Univ, Coll Hort & Forestry Sci, Key Lab Hort Plant Biol MOE, Wuhan 430070, Peoples R China

关键词： integrated analysis; Malus; molecular mechanism; salt tolerance

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN：

年卷期： 2023 年 24 卷 4 期

页码：

收录情况： SCI

摘要： The breeding of salt-tolerant rootstock relies heavily on the availability of salt-tolerant Malus germplasm resources. The first step in developing salt-tolerant resources is to learn their molecular and metabolic underpinnings. Hydroponic seedlings of both ZM-4 (salt-tolerant resource) and M9T337 (salt-sensitive rootstock) were treated with a solution of 75 mM salinity. ZM-4's fresh weight increased, then decreased, and then increased again after being treated with NaCl, whereas M9T337 ' s fresh weight continued to decrease. The results of transcriptome and metabolome after 0 h (CK) and 24 h of NaCl treatment showed that the leaves of ZM-4 had a higher content of flavonoids (phloretinm, naringenin-7-O-glucoside, kaempferol-3-O-galactoside, epiafzelechin, etc.) and the genes (CHI, CYP, FLS, LAR, and ANR) related to the flavonoid synthesis pathway showed up-regulation, suggesting a high antioxidant capacity. In addition to the high polyphenol content (L-phenylalanine, 5-O-p-coumaroyl quinic acid) and the high related gene expression (4CLL9 and SAT), the roots of ZM-4 exhibited a high osmotic adjustment ability. Under normal growing conditions, the roots of ZM-4 contained a higher content of some amino acids (L-proline, tran-4-hydroxy-L-prolin, L-glutamine, etc.) and sugars (D-fructose 6-phosphate, D-glucose 6-phosphate, etc.), and the genes (GLT1, BAM7, INV1, etc.) related to these two pathways were highly expressed. Furthermore, some amino acids (S-(methyl) glutathione, N-methyl-trans-4-hydroxy-L-proline, etc.) and sugars (D-sucrose, maltotriose, etc.) increased and genes (ALD1, BCAT1, AMY1.1, etc.) related to the pathways showed up-regulation under salt stress. This research provided theoretical support for the application of breeding salt-tolerant rootstocks by elucidating the molecular and metabolic mechanisms of salt tolerance during the early stages of salt treatment for ZM-4.

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