Geoffroy Alexandre, Sanguin Hervé, Galiana Antoine, Bâ Amadou
Laboratoire de Biologie et Physiologie Végétales, L'Unité de Formation des Sciences Exactes et Naturelles, Unité Mixte de Recherche LSTM, Université des AntillesPointe-à-Pitre, France.
Unité Mixte de Recherche LTSM, Centre de Coopération Internationale en Recherche Agronomique Pour le DéveloppementMontpellier, France.
Front Microbiol. 2017 Jul 28;8:1426. doi: 10.3389/fmicb.2017.01426. eCollection 2017.
(Jacq.) is a leguminous forestry tree species endemic to Caribbean swamp forests. In Guadeloupe, smallholder farmers traditionally cultivate flooded taro () cultures under the canopy of stands. The role of arbuscular mycorrhizal (AM) fungi in the sustainability of this traditional agroforestry system has been suggested but the composition and distribution of AM fungi colonizing the leguminous tree and/or taro are poorly characterized. An in-depth characterization of root-associated AM fungal communities from adult trees and seedlings and taro cultures, sampled in two localities of Guadeloupe, was performed by pyrosequencing (GS FLX+) of partial 18S rRNA gene. The AM fungal community was composed of 215 operational taxonomic units (OTUs), belonging to eight fungal families dominated by Glomeraceae, Acaulosporaceae, and Gigasporaceae. Results revealed a low AM fungal community membership between and . However, certain AM fungal community taxa (10% of total community) overlapped between and , notably predominant OTUs. These findings provide new perspectives in deciphering the significance of in nutrient exchange between and by forming a potential mycorrhizal network.
（雅克）是一种豆科林业树种，原产于加勒比沼泽森林。在瓜德罗普岛，小农户传统上在该树种的林冠下种植淹水芋头（）作物。丛枝菌根（AM）真菌在这种传统农林业系统可持续性中的作用已被提及，但定殖于豆科树木和/或芋头的AM真菌的组成和分布特征尚不明确。通过对部分18S rRNA基因进行焦磷酸测序（GS FLX+），对在瓜德罗普岛两个地点采集的成年树木、幼苗及芋头作物的根际AM真菌群落进行了深入表征。AM真菌群落由215个操作分类单元（OTU）组成，属于八个真菌科，其中以球囊霉科、无梗囊霉科和巨孢囊霉科为主。结果显示，该树种与芋头之间的AM真菌群落成员相似度较低。然而，该树种与芋头之间存在部分重叠的AM真菌群落分类单元（占群落总数的10%），特别是优势OTU。这些发现为解读该树种通过形成潜在菌根网络在与芋头养分交换中的重要性提供了新视角。
