| Title: | The inhibitory effects of different types of Brassica seed meals on the virulence of Ralstonia solanacearum |
| Author(s): | Peng J; Liu H; Shen M; Chen R; Li J; Dong Y; |
| Address: | "CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China. University of Chinese Academy of Sciences, Beijing, China. College of Life and Environmental Science, Wenzhou University, Wenzhou, China" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "BACKGROUND: Understanding the specific inhibitory effects of different Brassica seed meals (BSMs) on soilborne pathogens is important for their application as biocontrol agents for controlling plant disease. In this study, the seed meals of Brassica napus L. (BnSM), Brassica campestris L. (BcSM), and Brassica juncea L. (BjSM), and the combined seed meal of BcSM and BjSM (CSM, 1:1), were selected for investigation. The inhibitory effects of these seed meals on the plant pathogen Ralstonia solanacearum (Smith) and tomato bacterial wilt, were assessed and compared. RESULTS: All the BSMs significantly inhibited the growth of R. solanacearum in vitro. Furthermore, the BSMs could effectively suppress R. solanacearum virulence traits, including motility, exopolysaccharide production, dehydrogenase activity, virulence-related gene expression, and colonization in the soil. Among them, BjSM showed the best inhibiting effects, and CSM displayed synergic toxicity against R. solanacearum. In addition, the predominant antibacterial compounds in BcSM and BjSM were identified as the volatile compounds, 3-butenyl isothiocyanate and allyl isothiocyanate, respectively. Finally, pot experiment verified that the control effects of BjSM and CSM on tomato wilt reached more than 90%. CONCLUSION: This is the first study to report on the ability of different kinds of BSMs to suppress the virulence of R. solanacearum and biocontrol efficiencies against bacterial wilt in tomato plants. Furtherly, the main antibacterial compounds in the BSMs were identified. The results demonstrated that CSM may possess potential for controlling bacterial wilt caused by R. solanacearum. The results provide a fresh perspective for comprehending the mechanism underlying BSM suppression of pathogens and plant disease" |
| Keywords: | *Brassica Meals *Ralstonia solanacearum Seeds Virulence Brassica seed meals Ralstonia solanacearum soil fumigation volatile organic compound; |
| Notes: | "MedlinePeng, Junwei Liu, Hong Shen, Minchong Chen, Ruihuan Li, Jiangang Dong, Yuanhua eng National Key Research and Development Program of China (NO. 2017YFD0200604 and NO. 2016YFD0200305)/ National Natural Science Foundation of China (No. 41977055)/ England 2021/07/13 Pest Manag Sci. 2021 Nov; 77(11):5129-5138. doi: 10.1002/ps.6552. Epub 2021 Jul 27" |
