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Amelioration of saline-alkali land by cultivating Melia azedarach and characterization of underlying mechanisms via metabolome analysis
  • +7
  • Xiaohua Long,
  • Na Li,
  • Tianyun Shao,
  • Tianyun Shao,
  • Bin Li,
  • Xinglan Wang,
  • Chenyunzhu Tao,
  • Tianyun Shao,
  • Xiumei Gao,
  • Zed Rengel
Xiaohua Long
Nanjing Agricultural University College of Resources and Environmental Sciences

Corresponding Author:[email protected]

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Na Li
Nanjing Agricultural University College of Resources and Environmental Sciences
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Tianyun Shao
Nanjing Agricultural University College of Resources and Environmental Sciences
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Tianyun Shao
Jiangsu Fangyang Group co ltd
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Bin Li
Nanjing Agricultural University College of Resources and Environmental Sciences
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Xinglan Wang
Nanjing Agricultural University College of Resources and Environmental Sciences
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Chenyunzhu Tao
Nanjing Agricultural University College of Resources and Environmental Sciences
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Tianyun Shao
Nanjing Agricultural University College of Resources and Environmental Sciences
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Xiumei Gao
Nanjing Agricultural University College of Resources and Environmental Sciences
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Zed Rengel
UWA School of Agriculture and Environment
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Abstract

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. In this study, we analyzed the soil properties and metabolome of M. azedarach roots grown in low- (< 3 g/kg; L), medium- (5~8 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-) differential metabolites (DEMs) were detected. The number of DEMs in roots rose with increased soil salinity, such as sugars and flavonoids in H vs. L, and amino acids in M vs. L. The most up-regulated DEMs were 13-S-hydroxyoctadecadienoic acid, 2’-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 provided a basis for understanding the mechanism underlying the adaptation of M. azedarach to saline-alkali soil and its amelioration.
17 Mar 2023Submitted to Land Degradation & Development
17 Mar 2023Submission Checks Completed
17 Mar 2023Assigned to Editor
18 Mar 2023Review(s) Completed, Editorial Evaluation Pending
18 Mar 2023Reviewer(s) Assigned
15 Apr 2023Editorial Decision: Revise Major
07 May 20231st Revision Received
10 May 2023Review(s) Completed, Editorial Evaluation Pending
10 May 2023Submission Checks Completed
10 May 2023Assigned to Editor
13 May 2023Reviewer(s) Assigned
11 Jun 2023Editorial Decision: Revise Minor
13 Jun 20232nd Revision Received
08 Jul 2023Review(s) Completed, Editorial Evaluation Pending
08 Jul 2023Submission Checks Completed
08 Jul 2023Assigned to Editor
08 Jul 2023Editorial Decision: Revise Minor
19 Jul 20233rd Revision Received
19 Jul 2023Review(s) Completed, Editorial Evaluation Pending
19 Jul 2023Submission Checks Completed
19 Jul 2023Assigned to Editor
23 Jul 2023Editorial Decision: Revise Minor
25 Jul 20234th Revision Received
25 Jul 2023Review(s) Completed, Editorial Evaluation Pending
25 Jul 2023Submission Checks Completed
25 Jul 2023Assigned to Editor
30 Jul 2023Editorial Decision: Accept