植物纤毛虫的潜在特有纤毛虫表现出很高的宏观进化率

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Fabiola da Silva Costa, Roberto Júnio Pedroso Dias, Mariana Fonseca Rossi
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引用次数: 0

摘要

这项工作的目的是推断植物界潜在特有纤毛虫的起源时间和进化模式,并划定它们到达这种环境之前的扩散路线。我们根据 GenBank 中的 18Sr-RNA 序列估算了分子系统发生的年代。我们推断了栖息地的祖先状态以及与评估栖息地相关的多样化率动态。我们的研究结果表明,植物纤毛虫栖息地的出现是最近的事,并且在进化过程中多次独立出现,是凤梨属植物出现后潜在特有纤毛虫的起源。我们的数据还显示,纤毛虫到达植物界有四种不同的途径:(i) 海洋/咸水祖先,(ii) 淡水祖先,(iii) 陆地祖先,或 (iv) 共生祖先。此外,我们还注意到潜在的地方性纤毛虫向凤梨科植物的分化率显著增加。一些生态、形态和进化假说有助于解释这些纤毛虫的成功进化。不过,还需要对该类纤毛虫进行更多的研究,以确定解释这一过程的复杂假说。这强调了对该类纤毛虫进行生态学和分子研究的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Potentially endemic ciliates of phytotelma exhibit high macroevolutionary rates

Potentially endemic ciliates of phytotelma exhibit high macroevolutionary rates

This work aimed to infer the time of origin and the mode of evolution of the potentially endemic ciliates of the phytotelmata, as well as delimit their dispersal routes until reaching this environment. We estimate a dated molecular phylogeny from the 18Sr-RNA sequence available from GenBank. We inferred the habitat ancestral state and the dynamics of the diversification rates related to assessed habitats. Our results showed that the arrival to phytotelmata habitats is recent and occurred numerous times and independently over evolutionary time, being the origin of potentially endemic ciliates after the appearance of bromeliads. Our data also revealed that the arrival of the ciliates to the phytotelma occurred through four distinct routes: (i) from a marine/brackish ancestor, (ii) a freshwater ancestor, (iii) a terrestrial ancestor, or (iv) a symbiotic ancestor. In addition, we noticed a significant increase in the diversification rates of potentially endemic ciliates to bromeliad phytotelma. Several ecological, morphological and evolutionary hypotheses help to explain these ciliates' evolutionary success. However, more studies with this group are needed to define complex hypotheses explaining such a process. It emphasizes the need to dedicate efforts to develop ecological and molecular studies with this group.

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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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