Polyethyleneimine-coated MXene quantum dots improve cotton tolerance to Verticillium dahliae by maintaining ROS homeostasis

Ping Qiu, Jiayue Li, Lin Zhang, Kun Chen, Jianmin Shao, Baoxin Zheng, Hang Yuan, Jie Qi, Lin Yue, Qin Hu, Yuqing Ming, Shiming Liu, Lu Long, Jiangjiang Gu, Xianlong Zhang, Keith Lindsey, Wei Gao (), Honghong Wu () and Longfu Zhu ()
Additional contact information
Ping Qiu: Huazhong Agricultural University
Jiayue Li: Huazhong Agricultural University
Lin Zhang: Huazhong Agricultural University
Kun Chen: Huazhong Agricultural University
Jianmin Shao: Huazhong Agricultural University
Baoxin Zheng: Huazhong Agricultural University
Hang Yuan: Huazhong Agricultural University
Jie Qi: Huazhong Agricultural University
Lin Yue: Huazhong Agricultural University
Qin Hu: Huazhong Agricultural University
Yuqing Ming: Huazhong Agricultural University
Shiming Liu: Huazhong Agricultural University
Lu Long: Henan University
Jiangjiang Gu: Huazhong Agricultural University
Xianlong Zhang: Huazhong Agricultural University
Keith Lindsey: Durham University
Wei Gao: Henan University
Honghong Wu: Huazhong Agricultural University
Longfu Zhu: Huazhong Agricultural University

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Verticillium dahliae is a soil-borne hemibiotrophic fungal pathogen that threatens cotton production worldwide. In this study, we assemble the genomes of two V. dahliae isolates: the more virulence and defoliating isolate V991 and nondefoliating isolate 1cd3-2. Transcriptome and comparative genomics analyses show that genes associated with pathogen virulence are mostly induced at the late stage of infection (Stage II), accompanied by a burst of reactive oxygen species (ROS), with upregulation of more genes involved in defense response in cotton. We identify the V991-specific virulence gene SP3 that is highly expressed during the infection Stage II. V. dahliae SP3 knock-out strain shows attenuated virulence and triggers less ROS production in cotton plants. To control the disease, we employ polyethyleneimine-coated MXene quantum dots (PEI-MQDs) that possess the ability to remove ROS. Cotton seedlings treated with PEI-MQDs are capable of maintaining ROS homeostasis with enhanced peroxidase, catalase, and glutathione peroxidase activities and exhibit improved tolerance to V. dahliae. These results suggest that V. dahliae trigger ROS production to promote infection and scavenging ROS is an effective way to manage this disease. This study reveals a virulence mechanism of V. dahliae and provides a means for V. dahliae resistance that benefits cotton production.

Date: 2023
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DOI: 10.1038/s41467-023-43192-4

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