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Research paper | Open Access

A glutathione S-transferase IbGSTL2 interacts with IbcPGM to increase starch content and improve starch quality in sweetpotato

Yue Fan, Tianyu Chen, Luyao Xue, Huan Zhang, Shaopei Gao, Ning Zhao, Shaozhen He, Hong Zhai, Qingchang Liu( )
Key Laboratory of Sweetpotato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing 100193, China
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Abstract

A glutathione S-transferase (GST) gene IbGSTL2 was cloned and characterized from sweetpotato. It harbored a variation associated with starch content in storage roots. Overexpression of IbGSTL2 increased starch content and amylopectin proportion, decreased gelatinization temperature, and improved degree of crystallinity in sweetpotato storage roots, while its RNA interference resulted in the opposite trends. IbGSTL2 physically interacted with IbcPGM, an enzyme of sucrose metabolism, and improve starch content and quality by regulating genes involved in starch biosynthesis.

Keywords

IbcPGMIbGSTL2Starch contentStarch qualitySweetpotato

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The Crop Journal
Volume 12 Issue 6,
December 2024
Pages 1666-1676
DOI: 10.1016/j.cj.2024.08.007

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Fan Y, Chen T, Xue L, et al. A glutathione S-transferase IbGSTL2 interacts with IbcPGM to increase starch content and improve starch quality in sweetpotato. The Crop Journal, 2024, 12(6): 1666-1676. https://doi.org/10.1016/j.cj.2024.08.007

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Received: 04 July 2024
Revised: 08 August 2024
Accepted: 17 September 2024
Published: 21 September 2024
© 2024 Crop Science Society of China and Institute of Crop Science, CAAS.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).