Bittleston Leonora S, Benson Elizabeth L, Bernardin Jessica R, Pierce Naomi E
Department of Biological Sciences, Boise State University, Boise, ID, United States.
Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, United States.
Front Plant Sci. 2022 Jun 6;13:887635. doi: 10.3389/fpls.2022.887635. eCollection 2022.
The Albany pitcher plant, , has evolved cup-shaped leaves and a carnivorous habit completely independently from other lineages of pitcher plants. It is the only species in the family Cephalotaceae and is restricted to a small region of Western Australia. Here, we used metabarcoding to characterize the bacterial and eukaryotic communities living in pitchers at two different sites. Bacterial and eukaryotic communities were correlated in both richness and composition; however, the factors associated with richness were not the same across bacteria and eukaryotes, with bacterial richness differing with fluid color, and eukaryotic richness differing with the concentration of DNA extracted from the fluid, a measure roughly related to biomass. For turnover in composition, the variation in both bacterial and eukaryotic communities primarily differed with fluid acidity, fluid color, and sampling site. We compared -associated community diversity with that of Australian , as well as a global comparison of Southeast Asian and North American . Our results showed similarity in richness with communities from other pitcher plants, and specific bacterial taxa shared among all three independent lineages of pitcher plants. Overall, we saw convergence in richness and particular clades colonizing pitcher plants around the world, suggesting that these highly specialized habitats select for certain numbers and types of inhabitants.
阿尔巴尼猪笼草（Cephalotus follicularis）已经进化出杯状叶子和食肉习性，这与其他猪笼草谱系完全独立。它是 Cephalotaceae 科中的唯一物种，仅分布于西澳大利亚的一个小区域。在这里，我们使用元条形码技术来表征生活在两个不同地点的猪笼草捕虫笼中的细菌和真核生物群落。细菌和真核生物群落在丰富度和组成上都存在相关性；然而，与丰富度相关的因素在细菌和真核生物中并不相同，细菌丰富度随液体颜色而变化，真核生物丰富度随从液体中提取的 DNA 浓度而变化，DNA 浓度大致与生物量相关。对于组成的周转率，细菌和真核生物群落的变化主要随液体酸度、液体颜色和采样地点而不同。我们将捕虫笼相关的群落多样性与澳大利亚风铃猪笼草（Darlingtonia californica）的进行了比较，还与东南亚猪笼草和北美猪笼草进行了全球比较。我们的结果表明，其丰富度与其他猪笼草的群落相似，并且在猪笼草的所有三个独立谱系中都共享特定的细菌分类群。总体而言,我们发现全球猪笼草在丰富度和特定进化枝定殖方面存在趋同现象，这表明这些高度专业化的栖息地会选择特定数量和类型的栖息生物。
