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, Ying Sun State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University , Nanjing 210095, Jiangsu , China Search for other works by this author on: Oxford Academic Na Yang State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University , Nanjing 210095, Jiangsu , China Search for other works by this author on: Oxford Academic Sirui Li State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University , Nanjing 210095, Jiangsu , China Search for other works by this author on: Oxford Academic Fei Chen State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University , Nanjing 210095, Jiangsu , China Search for other works by this author on: Oxford Academic Yijing Xie State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University , Nanjing 210095, Jiangsu , China Search for other works by this author on: Oxford Academic Canming Tang State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University , Nanjing 210095, Jiangsu , China Correspondence: tangcm@njau.edu.cn Search for other works by this author on: Oxford Academic
https://orcid.org/0000-0001-9837-3857 Journal of Experimental Botany, Volume 75, Issue 11, 7 June 2024, Pages 3500–3520, https://doi.org/10.1093/jxb/erae100
Published:
22 March 2024
Article history
Received:
02 June 2023
Editorial decision:
26 February 2024
Accepted:
21 March 2024
Published:
22 March 2024
Corrected and typeset:
05 May 2024
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Ying Sun, Na Yang, Sirui Li, Fei Chen, Yijing Xie, Canming Tang, Mechanism of oxalate decarboxylase Oxd_S12 from Bacillus velezensis BvZ45-1 in defence against cotton verticillium wilt, Journal of Experimental Botany, Volume 75, Issue 11, 7 June 2024, Pages 3500–3520, https://doi.org/10.1093/jxb/erae100
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Abstract
Verticillium wilt, a soilborne vascular disease caused by Verticillium dahliae, strongly affects cotton yield and quality. In this study, an isolated rhizosphere bacterium, designated Bacillus velezensis BvZ45-1, exhibited >46% biocontrol efficacy against cotton verticillium wilt under greenhouse and field conditions. Moreover, through crude protein extraction and mass spectrometry analyses, we found many antifungal compounds present in the crude protein extract of BvZ45-1. The purified oxalate decarboxylase Odx_S12 from BvZ45-1 inhibited the growth of V. dahliae Vd080 by reducing the spore yield, causing mycelia to rupture, spore morphology changes, cell membrane rupture, and cell death. Subsequently, overexpression of Odx_S12 in Arabidopsis significantly improved plant resistance to V. dahliae. Through studies of the resistance mechanism of Odx_S12, V. dahliae was shown to produce oxalic acid (OA), which has a toxic effect on Arabidopsis leaves. Odx_S12 overexpression reduced Arabidopsis OA content, enhanced tolerance to OA, and improved resistance to verticillium wilt. Transcriptomics and quantitative real-time PCR analysis revealed that Odx_S12 promoted a reactive oxygen species burst and a salicylic acid- and abscisic acid-mediated defence response in Arabidopsis. In summary, this study not only identified B. velezensis BvZ45-1 as an efficient biological control agent, but also identified the resistance gene Odx_S12 as a candidate for cotton breeding against verticillium wilt.
Bacillus velezensis, biological control, oxalate decarboxylase, resistance gene, upland cotton, Verticillium dahliae
© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/pages/standard-publication-reuse-rights)
Issue Section:
Research Papers > Plant—Environment Interactions
Editor: Monica Höfte Monica Höfte Editor University of Ghent , Belgium Search for other works by this author on: Oxford Academic
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