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Self-assembled thiophanate-methyl/star polycation complex prevents plant cell-wall penetration and fungal carbon utilization during cotton infection by Verticillium dahliae

文献类型： 外文期刊

作者： Su, Xiaofeng 1 ; Yan, Shuo 3 ; Zhao, Weisong 5 ; Liu, Haiyang 6 ; Jiang, Qinhong 3 ; Wei, Ying 3 ; Guo, Huiming 1 ; Yin, Meizhen 7 ; Shen, Jie 3 ; Cheng, Hongmei 1 ;

作者机构： 1.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Western Agr Res Ctr, Changji 831100, Peoples R China

3.China Agr Univ, Coll Plant Protect, Dept Plant Biosecur, Beijing 100193, Peoples R China

4.China Agr Univ, Coll Plant Protect, MARA Key Lab Surveillance & Management Plant Quara, Beijing 100193, Peoples R China

5.Hebei Acad Agr & Forestry Sci, Inst Plant Protect, Baoding 071000, Peoples R China

6.Xinjiang Acad Agr Sci, Inst Plant Protect, Urumqi 830091, Peoples R China

7.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing Lab Biomed Mat, Beijing 100029, Peoples R China

关键词： Cotton; Drug delivery; Nanopesticide; Thiophanate-methyl; Verticillium wilt

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）

ISSN： 0141-8130

年卷期： 2023 年 239 卷

页码：

收录情况： SCI

摘要： No effective fungicides are available for the management of Verticillium dahliae, which causes vascular wilt disease. In this study, a star polycation (SPc)-based nanodelivery system was used for the first time to develop a thiophanate-methyl (TM) nanoagent for the management of V. dahliae. SPc spontaneously assembled with TM through hydrogen bonding and Van der Waals forces to decrease the particle size of TM from 834 to 86 nm. Compared to TM alone, the SPc-loaded TM further reduced the colony diameter of V. dahliae to 1.12 and 0.64 cm, and the spore number to 1.13 x 108 and 0.72 x 108 cfu/mL at the concentrations of 3.77 and 4.71 mg/L, respectively. The TM nanoagents disturbed the expression of various crucial genes in V. dahliae, and contributed to preventing plant cell-wall degradation and carbon utilization by V. dahliae, which mainly impaired the infective interaction between pathogens and plants. TM nanoagents remarkably decreased the plant disease index and the fungal biomass in the root compared to TM alone, and its control efficacy was the best (61.20 %) among the various formulations tested in the field. Furthermore, SPc showed negligible acute toxicity toward cotton seeds. To the best of our knowledge, this study is the first to design a self-assembled nanofungicide that efficiently inhibits V. dahliae growth and protects cotton from the destructive Verticillium wilt.

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