农业系统对刚果民主共和国罗布斯塔咖啡根丛枝菌根真菌群落组成的影响。

IF 3.8 2区 生物学 Q2 MYCOLOGY
Ieben Broeckhoven, Arne Devriese, Olivier Honnay, Roel Merckx, Verbist Bruno
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引用次数: 0

摘要

罗布斯塔咖啡由50多个国家的2500万农民种植,在许多低收入国家的小农生计和经济中发挥着重要作用。咖啡与丛枝菌根真菌(AMF)建立互惠共生关系;然而,农业实践和土壤特征对AMF多样性和群落组成的影响尚不清楚。为了解决这个问题,我们描述了罗布斯塔咖啡在其原产刚果民主共和国部分地区的AMF社区组成。比较了咖啡单一栽培、农林复合系统和野生罗布斯塔在其原生雨林栖息地的AMF多样性和群落组成。利用Illumina测序技术对304根样品进行测序,鉴定出307个AMF操作分类单位(otu),以Glomus和Acaulospora属为主。OTU丰富度在三个研究系统中没有变化,但群落组成存在较大差异。许多独特的otu只在雨林中的咖啡中被观察到。总体而言,较低的土壤有效磷(P)和较低的土壤容重增加了野生森林咖啡AMF多样性,而较高的土壤有效磷和pH增加了野生森林咖啡AMF多样性。不同咖啡系统AMF群落组成的变化受冠层闭合、土壤pH、土壤有效磷和土壤容重的影响。我们的研究首次描述了野生罗布斯塔咖啡原产地的菌根群落特征,并表明,与自然基线相比,即使是低投入的农业实践也会导致AMF群落发生重大变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of agricultural systems on arbuscular mycorrhizal fungi community composition in robusta coffee roots in the Democratic Republic of congo.

Robusta coffee, grown by 25 million farmers across more than 50 countries, plays an important role in smallholder farmers' livelihoods and the economies of many low-income countries. Coffee establishes a mutualistic symbiosis with arbuscular mycorrhizal fungi (AMF); however, the impact of agricultural practices and soil characteristics on AMF diversity and community composition is not well understood. To address this, we characterised the AMF community composition of robusta coffee in part of its region of origin, the Democratic Republic of Congo. AMF diversity and community composition were compared between coffee monoculture, agroforestry systems and wild robusta in its native rainforest habitat. Using Illumina sequencing on 304 root samples, we identified 307 AMF operational taxonomic units (OTUs), dominated by the genera Glomus and Acaulospora. OTU richness did not vary across the three studied systems, yet large differences in community composition were found. Many unique OTUs were only observed in the coffee in the rainforest. In general, lower available soil phosphorus (P) and lower soil bulk density increased AMF diversity, yet higher available soil P and pH increased AMF diversity in the wild forest coffee. Shifts in AMF community composition across coffee systems were driven by canopy closure, soil pH, available soil P and soil bulk density. Our study is the first to characterise mycorrhizal communities in wild robusta coffee in its region of origin and shows that even low-input agricultural practices result in major AMF community shifts as compared to a natural baseline.

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来源期刊
Mycorrhiza
Mycorrhiza 生物-真菌学
CiteScore
8.20
自引率
2.60%
发文量
40
审稿时长
6-12 weeks
期刊介绍: Mycorrhiza is an international journal devoted to research into mycorrhizas - the widest symbioses in nature, involving plants and a range of soil fungi world-wide. The scope of Mycorrhiza covers all aspects of research into mycorrhizas, including molecular biology of the plants and fungi, fungal systematics, development and structure of mycorrhizas, and effects on plant physiology, productivity, reproduction and disease resistance. The scope also includes interactions between mycorrhizal fungi and other soil organisms and effects of mycorrhizas on plant biodiversity and ecosystem structure. Mycorrhiza contains original papers, short notes and review articles, along with commentaries and news items. It forms a platform for new concepts and discussions, and is a basis for a truly international forum of mycorrhizologists from all over the world.
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