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Changes in the Metabolome of Two Soybean Genotypes under Drought Stress

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Abstract

Soybean is the world’s leading economic oilseed crop. Drought stress is a major constraint on the growth and yield stability of soybean. Here, wild soybean (Glycine soja Siebold & Zucc.) was found to be more drought tolerant than cultivated soybean (Glycine max (L.) Merr.) owing to morphological changes at the whole-plant level when subjected to 5% PEG-6000 treatment. Additionally, differential metabolites between two soybean genotypes seedlings leaves were analyzed at the cellular level using a gas chromatography-mass spectrometry-based metabolomics method. The root lengths of wild soybean increased and a high root/shoot ratio was maintained under drought stress conditions. In addition, the drought tolerance of wild soybean resulted from significantly greater levels of favorable metabolites, such as aromatic and serine family amino acids, as well as sugar and polylols involved in mannose and galactose metabolism, favorable secondary metabolites, and organic and fatty acids compared with cultivated soybean. At the same time, wild soybeans could maintain a stable TCA cycle and significantly enhance glycolysis to produce more energy and enhance the phosphate pentose pathway to create more reducing power. Our experimental results provide an important reference for the breeding of wild soybeans in arid environments, as well as methodological for utilizing wild soybeans and improving cultivated soybeans.

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ACKNOWLEDGMENTS

We thank Jilin Academy of Agriculture Science for kindly helping to provide soybean seeds.

Funding

This work was supported by the National Natural Science Foundation of China (project no. 31870278) and Collaborative Innovation of Scientific and Technological of Chinese Academy of Agricultural Sciences.

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Authors and Affiliations

Authors

Contributions

H. Fu, R. Guo and L.X. Shi designed the research; H. Fu, R. Guo, M.X. Li and Y. Liu performed the research; M.L. Zhao and X.X. Wang provided experimental assistance to H. Fu; M.L. Zhao, X.X. Wang, S.Y. Wang and X.Y. Liu analyzed the data; H. Fu, R. Guo, M.X. Li, W.Y. Shen and L.X. Shi wrote the article. All authors reviewed the manuscript.

Corresponding authors

Correspondence to R. Guo or L. X. Shi.

Ethics declarations

The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants as objects of research.

Additional information

Abbreviations: CK—control treatment; DS—drought stress; M—cultivated soybean; PC1—the first principal component; PC2— the second principal component; PPP—pentose phosphate pathway; W—wild soybean.

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Fu, H., Guo, R., Shen, W.Y. et al. Changes in the Metabolome of Two Soybean Genotypes under Drought Stress. Russ J Plant Physiol 67, 472–481 (2020). https://doi.org/10.1134/S1021443720030085

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  • DOI: https://doi.org/10.1134/S1021443720030085

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