文献类型： 外文期刊

作者： Li, Na ¹ ; Shao, Tianyun ¹ ; Jia, Bingzhi ² ; Yan, Xiao ¹ ; Wang, Xinglan ¹ ; Tao, Chenyunzhu ¹ ; Long, Xiaohua ¹ ; Liu, Manqiang ¹ ; Zhou, Zhaosheng ¹ ; Rengel, Zed ⁴ ;

作者机构： 1.Nanjing Agr Univ, Coll Resources & Environm Sci, Jiangsu Prov Key Lab Marine Biol, Nanjing, Peoples R China

2.Jiangsu Fangyang Grp Co Ltd, Lianyungang, Peoples R China

3.Inner Mongolia Acad Agr & Anim Husb Sci, Inst Crop Sci, Hohhot, Inner Mongolia, Peoples R China

4.Univ Western Australia, UWA Sch Agr & Environm, Soil Sci & Plant Nutr, Perth, WA, Australia

5.Inst Adriat Crops & Karst Reclamat, Split, Croatia

6.Nanjing Agr Univ, Coll Resources & Environm Sci, Jiangsu Prov Key Lab Marine Biol, Nanjing 210095, Peoples R China

关键词： adaptation; in situ restoration; Melia azedarach; root metabolome; salt stress; soil salinization

期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.7； 五年影响因子：5.0 ）

ISSN： 1085-3278

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Soil salinization is a serious problem leading to ecological degradation. Melia azedarach is highly salt-tolerant, and its application to saline-alkali land is a promising strategy for restoring degraded lands. However, most studies only focus on the salt-reducing effect of herbs on saline-alkali land, and there are few studies on the metabolic adaptation mechanism of trees in the process of soil restoration in coastal saline-alkali land. In this study, we analyzed the soil properties and metabolome of M. azedarach roots grown in low- (<3 g/kg; L), medium- (5 similar to 8 g/kg; M), and high(>10 g/kg; H) salinity soils to explore the amelioration effect and adaptation mechanism of M. azedarach to soils with differential salinity. Cultivation of M. azedarach was associated with a decrease in the concentration of Na+ and increases in organic matter content and alkaline phosphatase and urease activities in the rhizosphere soil. The metabolome analysis revealed that a total of 382 (ESI+) and 277 (ESI similar to) differential metabolites (DEMs) were detected. The number of DEMs in roots rose with increased soil salinity, such as sugars and flavonoids in H versus L, and amino acids in M versus L. The most up-regulated DEMs were 13-S-hydroxyoctadecadienoic acid, 20-Deoxyuridine, and 20-hydroxyleukotriene B4. Combined analysis of soil properties and M. azedarach DEMs indicated that alkaline phosphatase activity was positively correlated with traumatic acid concentration. Taken together, these results indicate that M. azedarach has the potential to reduce soil salinity and enhance soil enzyme activity, and it can adapt to salt stress by regulating metabolites like sugars, amino acids, and flavonoids. This study provides a basis for understanding the mechanism underlying the adaptation of M. azedarach to saline-alkali soil and its amelioration.