Culturable bacteria are more common than fungi in floral nectar and are more easily dispersed by thrips, a ubiquitous flower visitor
Culturable bacteria are more common than fungi in floral nectar and are more easily dispersed by thrips, a ubiquitous flower visitor
复制标题
花蜜中可培养的细菌比真菌更常见，并且更容易被蓟马（一种无处不在的花卉访客）传播
DOI：
10.1093/femsec/fiab150
复制
发表时间：
2021
影响因子：
4.2
通讯作者：
Perry, Douglas
中科院分区：
文献类型：
--
作者：
Vannette, Rachel L.;McMunn, Marshall S.;Hall, Griffin W.;Mueller, Tobias G.;Munkres, Ivan;Perry, Douglas
类群之间分散能力的变化影响群落内的群落组装和生物多样性维护。尽管真菌和细菌经常共存，但人们对它们的相对扩散能力知之甚少。花蜜栖息的微生物群落影响植物繁殖和传粉者行为，并且是研究元群落框架中细菌和真菌传播的优秀模型。在这里，我们在基于昆虫的传播实验中测定了常见花蜜细菌和真菌的传播能力。然后，我们将这些结果与加利福尼亚州两个共花群落两个花季中自然存在的花朵中可培养的花栖细菌和真菌的发生率和丰度进行比较。我们的微生物传播实验表明，细菌比真菌更容易通过蓟马在人工栖息地斑块中传播。在野外，可培养细菌和真菌的发生率和丰度呈正相关，但细菌分布广泛。这些模式表明可培养细菌和真菌之间具有共同的传播途径或栖息地要求，但蓟马（常见的访花植物）的传播或定殖频率存在差异。研究发现，可培养细菌在这里采集的花蜜中更为常见，部分原因是蓟马介导的传播能力更强，这可能与微生物生活史、微生物群落组装以及植物与传粉媒介的相互作用有关。
Variation in dispersal ability among taxa affects community assembly and biodiversity maintenance within metacommunities. Although fungi and bacteria frequently coexist, their relative dispersal abilities are poorly understood. Nectar-inhabiting microbial communities affect plant reproduction and pollinator behavior, and are excellent models for studying dispersal of bacteria and fungi in a metacommunity framework. Here, we assay dispersal ability of common nectar bacteria and fungi in an insect-based dispersal experiment. We then compare these results with the incidence and abundance of culturable flower-inhabiting bacteria and fungi within naturally occurring flowers across two coflowering communities in California across two flowering seasons. Our microbial dispersal experiment demonstrates that bacteria disperse via thrips among artificial habitat patches more readily than fungi. In the field, incidence and abundance of culturable bacteria and fungi were positively correlated, but bacteria were much more widespread. These patterns suggest shared dispersal routes or habitat requirements among culturable bacteria and fungi, but differences in dispersal or colonization frequency by thrips, common flower visitors. The finding that culturable bacteria are more common among nectar sampled here, in part due to superior thrips-mediated dispersal, may have relevance for microbial life history, community assembly of microbes, and plant–pollinator interactions.