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Overexpression of UDP-glycosyltransferase genes enhanced aluminum tolerance through disrupting cell wall polysaccharide components in soybean

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Abstract

Purpose

Plant cell wall polysaccharide composition is closely related to the occurrence of aluminum (Al) toxicity and Al resistance. Glycosyltransferases participate in cell wall polysaccharide biosynthesis. Our previous microarray analysis showed that Al increased the transcriptional abundance of UDP-glycosyltransferase (UGT) in soybean (Glycine max). The present study aimed to clarify if GmUGTs are involved in modifying the composition of cell wall polysaccharides and then alter soybean Al sensitivity.

Methods

Two soybean genes, UGT85A111 and UGT83R1, were identified, and their functions were characterized by analyses of expression pattern and subcellular localization, and evaluations of carbohydrates in the cell wall and Al sensitivity by their overexpression in soybean hairy roots and Arabidopsis.

Results

The transcriptional expression of UGT85A111 and UGT83R1 was increased with different patterns and levels under Al stress. Both GmUGTs localized to the plasma membrane. UGT85A111-OE and UGT83R1-OE soybean hairy roots showed less Al absorption, which was accompanied by alterations in cell wall polysaccharide components, particularly reduced callose and/or hemicellulose contents. Monosaccharide content, including glucose and xylose in the GmUGTs-OE roots, was also affected. Heterologous expression of UGT85A111 and UGT83R1 significantly improved the plant’s Al resistance capacity.

Conclusion

GmUGTs contribute to the disruption of cell wall polysaccharide compositions and Al sensitivity in soybean. The results suggest a particularly protective role of UGTs against Al toxicity and may provide novel clues for plant Al stress adaptation.

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Acknowledgements

Financial support for this research was provided by the National Natural Science Foundation of China (No. 31372124 and No. 31772388) for JF You, University Undergraduates Innovating Experimentation Project (No. 202010183073) for ZP Wei. We thank LetPub (https://www.letpub.com.cn) for its linguistic assistance.

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Authors and Affiliations

Authors

Contributions

JY designed the entire experiment. ZW conducted subcellular localization assays. ZW, HL, ZPW cultured plants and performed hairy root induction assays. JG and HS performed qRT-PCR assays. ZW, HL, ZPW, HS, YH, JG and ZY performed polysaccharides and monosaccharides determination. JY and HL analyzed the data and wrote the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Jiangfeng You.

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Conflict of interest

The authors declare no competing interests.

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Responsible Editor: Jian Feng Ma.

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Wang, Z., Li, H., Wei, Z. et al. Overexpression of UDP-glycosyltransferase genes enhanced aluminum tolerance through disrupting cell wall polysaccharide components in soybean. Plant Soil 469, 135–147 (2021). https://doi.org/10.1007/s11104-021-05157-8

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  • DOI: https://doi.org/10.1007/s11104-021-05157-8

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