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Xie S, Si H, Xue Y, Zhou R, Wang S, Duan Y, Niu J, Wang Z. Efficacy of rhizobacteria Paenibacillus polymyxa SY42 for the biological control of Atractylodes chinensis root rot. Microb Pathog 2024; 187:106517. [PMID: 38159617 DOI: 10.1016/j.micpath.2023.106517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/11/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024]
Abstract
Atractylodes chinensis is one of the most commonly used bulk herbs in East Asia; however, root rot can seriously affect its quality and yields. In contrast to chemical pesticides, biological control strategies are environmentally compatible and safe. For this study, 68 antagonistic bacterial strains were isolated from the rhizospheres of healthy Atractylodes chinensis. Strain SY42 exhibited the most potent fungicidal activities, with inhibition rates against F. oxysporum, F. solani, and F. redolens of 67.07 %, 63.40 % and 68.45 %, respectively. Through morphological observation and molecular characterization, strain SY42 was identified as Paenibacillus polymyxa. The volatile organic components (VOCs) produced by SY42 effectively inhibited the mycelial growth of pathogenic fungi through diffusion. SY42 significantly inhibited the germination of pathogenic fungal spores. Following co-culturing with SY42, the mycelium of the pathogenic fungus was deformed, folded, and even ruptured. SY42 could produce cellulases and proteases to degrade fungal cell walls. Pot experiments demonstrated the excellent biocontrol efficacy of SY42. This study revealed that P. polymyxa SY42 inhibited pathogenic fungi through multiple mechanisms, which verified its utility as a biocontrol agent for the control of A. chinensis root rot.
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Affiliation(s)
- Siyuan Xie
- National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest of China, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), The Ministry of Education, Xi'an, 710119, China; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.
| | - He Si
- National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest of China, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), The Ministry of Education, Xi'an, 710119, China; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.
| | - Yuyan Xue
- National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest of China, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), The Ministry of Education, Xi'an, 710119, China; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.
| | - Ru Zhou
- National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest of China, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), The Ministry of Education, Xi'an, 710119, China; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.
| | - Shiqiang Wang
- National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest of China, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), The Ministry of Education, Xi'an, 710119, China; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.
| | - Yizhong Duan
- College of Life Sciences, Yulin University, Yulin, Shaanxi, 718000, China.
| | - Junfeng Niu
- National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest of China, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), The Ministry of Education, Xi'an, 710119, China; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.
| | - Zhezhi Wang
- National Engineering Laboratory for Resource Development of Endangered Chinese Crude Drugs in Northwest of China, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), The Ministry of Education, Xi'an, 710119, China; College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, 710119, China.
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