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Application of Endophytic Bacteria from Tomato Stems to Control Bacterial Wilt Disease in Tomato and Enhance Plant Growth


  • Quang Trung Do Falculty of Biotechnology, Dai Nam University, Xom – Phu Lam – Ha Dong- Ha Noi - Vietnam
  • Danh Quang Do Falculty of Biotechnology, Dai Nam University, Xom – Phu Lam – Ha Dong- Ha Noi - Vietnam
  • Van Nha Pham Falculty of Biotechnology, Dai Nam University, Xom – Phu Lam – Ha Dong- Ha Noi - Vietnam
  • Thi Ngan Nguyen Falculty of Biotechnology, Dai Nam University, Xom – Phu Lam – Ha Dong- Ha Noi - Vietnam
  • Thi Thuy Linh Ngo Falculty of Biotechnology, Dai Nam University, Xom – Phu Lam – Ha Dong- Ha Noi - Vietnam
  • Thi Hong Van Pham Falculty of Biotechnology, Dai Nam University, Xom – Phu Lam – Ha Dong- Ha Noi - Vietnam
  • Trong Tri Nguyen Vietnam National University of Forestry, Xuan Mai - Ha Noi - Vietnam
  • Mai Van Dinh Hanoi University of Science, Vietnam National University Hanoi, 334 Nguyen Trai – Thanh Xuan - Ha Noi - Vietnam


Antagonistic ability, Bacterial wilt , Bacillus spp, endophytic bacteria, Ralstonia solanacearum


Bacterial green wilt (BGW) disease, caused by Ralstonia solanacearum bacterium, is a devastating bacterial disease of tomatoes occurring in tropical zones, resulting in substantial yield losses in production fields. Biological control agents (BCAs), particularly plant endophytes such as bacteria, are becoming increasingly popular in microbial technology for cropping systems. In this study, we assessed the potential of endophytic bacteria from tomato plants to suppress the BGW caused by R. solanacearum in tomato plants. The research study revealed that out of the 9 endophytic strains isolated, Bacillus amyloliquefaciens TO3 demonstrated a strong antagonistic ability towards R. solanacearum, with the zone of inhibition approximately 16.58±0.19 mm. This strain also produced cell wall-degrading enzymes (amylase, protease, and cellulase), and indole acetic acid (IAA). In addition, the greenhouse experiments showed that applying TO3 before the infection of R. solanacearum led to a high protective effect against the BGW and a significant increase in plant height compared to the non-inoculated ones. In field conditions, inoculating tomato seedlings with strain TO3 resulted in a disease reduction of over 55% against the BGW compared to the non-treated control. Moreover, treatment with strain TO3 increased the yield of tomato fruits by up to 47.93% compared to non-treated control plants. These findings indicate the potential use of B. amyloliquefaciens TO3 in preventing the BGW disease caused by R. solanacearum on tomato plants.


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