植物成長と微生物リスク制御の横断的循環系メカニズムを解明(Scientists Reveal Mechanisms of Cross-domain Circular System in Plant Growth and Microbiological Risk Regulation)

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2025-04-22 中国科学院(CAS)

中国科学院昆明植物研究所の研究チームは、農業廃棄物(ワラ、牛ふん、キノコ廃培地)を循環的に利用する「家畜-作物-キノコ(LCM)クロスドメイン循環システム」を開発し、持続可能な農業と微生物リスクの低減に貢献する仕組みを解明した。特に、食用キノコ「Stropharia rugosoannulata」を介して微生物群集の構造を再構築し、有害病原体や抗生物質耐性遺伝子(ARGs)を効果的に抑制しつつ、作物の成長や根の発達を促進することが確認された。研究は『Environmental Science & Technology』に掲載された。

<関連情報>

家畜-作物-キノコ(LCM)循環システム: 植物のパフォーマンス向上と微生物学的リスク軽減のための環境に優しいアプローチ Livestock–Crop–Mushroom (LCM) Circular System: An Eco-Friendly Approach for Enhancing Plant Performance and Mitigating Microbiological Risks

Dong Liu,Yousif Abdelrahman Yousif Abdellah,Tingting Dou,Katharina Maria Keiblinger,Ziyan Zhou,Parag Bhople,Jishao Jiang,Xiaofei Shi,Fengming Zhang,Fuqiang Yu,and Baoshan Xing
Environmental Science & technology  Published: April 16, 2025
DOI:https://doi.org/10.1021/acs.est.4c12517

Abstract

植物成長と微生物リスク制御の横断的循環系メカニズムを解明(Scientists Reveal Mechanisms of Cross-domain Circular System in Plant Growth and Microbiological Risk Regulation)

Mushroom production using agroforestry biowaste is a great green cycling agriculture alternative. Therefore, the current study explored the Livestock–Crop–Mushroom (LCM) circular production model, starting with co-composting of straw and cow manure as a’St’ biofertilizer further used for mushroom cultivation that ultimately produced a’StM’ biofertilizer. The two biofertilizers were tested for their impacts on plant growth and potential microbial risks. The results show significant growth of oats stimulated by biofertiliser use. Both’St’ and’StM’ increased plant biomass, while with the latter, the crude protein content (+5.1%) and root biomass were also higher. Reduced abundances of resistome genes (30%) and pathogens (25%) were observed during the oat growth. Further, metagenomics analysis also indicated a reduction in antibiotic-resistance genes by −20% in soils with oats treated by’St’ and −46% in’StM’ biofertilizer treatment. The’StM’ had a three-fold stronger inhibitory effect on oat rhizosphere soil pathogens than’St’. Moreover, compared to’St’,’StM’ suppressed pathogens in seeds and stems, with specific beneficial biomarker microbes in different plant parts. Overall, the antibiotic resistance gene related to oxytetracycline decreased more than three-fold in the LCM system. This study demonstrates the substantial potential and scalability of the LCM circular system within the agricultural domain.

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