ORIGINAL RESEARCH article
Front. Microbiol.
Sec. Terrestrial Microbiology
Volume 16 - 2025 | doi: 10.3389/fmicb.2025.1625653
This article is part of the Research TopicUnveiling Microbiome Interactions and Functions in Soil HotspotsView all 12 articles
Reusing waste biomass in crop protection: Calcinated oyster shell powder enhances rhizospheric microbial-mediated suppression of root-knot nematodes.
Provisionally accepted
QIpeng Jiang1
Jiamin Yu2Yong Wang3Jinfeng Wang1Lianqiang Jiang3Shiping Guo2Yu Qian2Xiangwen Yu2Dongyang Liu3Daojiang Xi1Quan Deng3
Wei Ding1*Shili Li1*- 1College of plant protection, Southwest University, Chongqing, China
- 2Sichuan Company of China National Tobacco Corporation, Chengdu, China
- 3Liangshan Prefecture Branch of Sichuan Tobacco Corporation, Xichang, China
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Root-knot nematodes (RKNs) Meloidogyne incognita is one of the most destructive plantparasitic nematodes (PPNs) affecting crop production worldwide. Previous earlier study revealed that calcinated oyster shell powder (OSP) possessed excellent suppression of tobacco RKN disease.However, the suppression mechanism of OSP against RKNs still remains unrevealed. Hence, this study aimed to clarify the suppression mechanism of oyster shell powder against RKNs. The results showed that calcinated OSP reduced over 38% of tobacco root-knot index by inhibiting the migration of second-stage juvenile of Meloidogyne incongnita (J2) in soil. Furthermore, calcinated OSP reduced J2 density by 43.69% in tobacco rhizosphere, and significantly increased soil pH by 0.68, moreover, increased the contents of soil exchangeable calcium (ExchCa) and exchangeable magnesium (ExchMg) by over 50%. Meanwhile, soil properties, including ExchMg, ExchCa and pH enhanced microbial-mediated suppression of J2. Specifically, some taxa within Proteobacteria and Gemmatimonadota dominated microbial community and fungal richness may contributed to suppression of RKNs, otherwise, some taxa within Chloroflexi and Acidobacteriota dominated microbial community may be involved in RKNs' prosperity. Our study put forward that reusing wasted oyster shell powder as an innovative antagonist against RKNs presents promising avenues for nature-based PPN management strategies, and would generate significant economic value and social impact in plant protection.
Keywords: Oyster shell powder, Root-knot nematode, Meloidogyne incongnita, microbial community, Soil Amendments
Received: 09 May 2025; Accepted: 31 Jul 2025.
Copyright: © 2025 Jiang, Yu, Wang, Wang, Jiang, Guo, Qian, Yu, Liu, Xi, Deng, Ding and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Wei Ding, College of plant protection, Southwest University, Chongqing, China
Shili Li, College of plant protection, Southwest University, Chongqing, China
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