Composition, richness and nonrandom assembly of culturable bacterialmicrofungal communities in floral nectar of Mediterranean plants

被引:89
作者
Alvarez-Perez, Sergio [1 ]
Herrera, Carlos M. [1 ]
机构
[1] CSIC, Estn Biol Donana, E-41092 Seville, Spain
关键词
bacteria; community structure; nectar microbiology; Mediterranean plants; pollination; yeasts; SPECIES COOCCURRENCE; INTRAPLANT VARIATION; BACTERIAL; YEASTS; DIVERSITY; MICROORGANISMS; IDENTIFICATION; BIOGEOGRAPHY; POLYTOMIES; GENERATION;
D O I
10.1111/1574-6941.12027
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The recent upsurge of interest in the role of floral nectar as a habitat for microorganisms has led to some detailed analyses of nectarivorous yeasts. In contrast, very little is known on the occurrence and diversity of nectar-dwelling bacteria, and bacterialfungal interactions within nectar remain unexplored. In this work, we studied both the culturable bacteria and microfungi found in the floral nectar of wild Mediterranean plants. In general, bacteria and yeasts were found coexisting in nectar more often than would be expected by chance, and such positive association persisted after accounting for phylogenetic nonindependence of the plant species surveyed. Metschnikowia species were confirmed as the main fungal components of nectar communities, and Acinetobacter was identified as the main bacterial taxa. Finally, individual Operational Taxonomic Units (OTUs) were found to co-occur less frequently than predicted by random expectations. There existed, however, some pairwise associations between OTUs that seemed to account for the general pattern of positive bacteriayeasts coexistence. We conclude that the culturable communities of nectar microorganisms associated with wild Mediterranean plants are nonrandom assemblages of bacterial and yeast species.
引用
收藏
页码:685 / 699
页数:15
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