Wind Direction and Strength Determine the Genetic Structure of an Insect-Pollinated Plant Across Heterogeneous Landscape

IF 3.4 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography Pub Date : 2025-03-07 DOI:10.1111/jbi.15119

Jun-Yin Deng, Rong-Hua Fu, Stephen G. Compton, Chuan Yuan, Matthew M. Kling, Xiao-Yong Chen, Yao-Bin Song, Kai Jiang, Mei Liu, Jaco M. Greeff, Yan Chen

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引用次数: 0

Abstract

Aim

Dispersal of plant propagules and their genes is crucial for plant responses to landscape heterogeneities, yet the mechanisms behind this dispersal remain unclear. Ficus species depend on wind-borne fig wasps for pollination, but research on airflow effects on Ficus genetic structure has produced conflicting results. Our study aims to clarify the role of wind in shaping the genetic structure of such plants with wind-borne insect pollinators by examining how geomorphological complexity interacts with air movements to influence genetic structures.

Location

Southwest China: Sichuan, Yunnan, Guangxi and Guizhou provinces.

Taxon

Ficus tikoua Bur., Ficus, Moraceae.

Methods

We sampled 56 F. tikoua sites across southwest China, characterised by high geomorphologic complexity. River basins and predominant winds were visualised across the sampled regions. Wind connectivity between sampled sites during the main pollination season was modelled based on hourly daily wind data. The maternal and biparental genetic structure of sites were reconstructed using chloroplast DNA (cpDNA) and nuclear SSR (nuSSR) markers. Links between genetic structure, location, and wind parameters were estimated by Mantel or partial Mantel tests.

Results

The plant's maternal genetic structure was defined by river systems, with two distinct cpDNA groups located in the Yangtze and Pearl River basins, respectively. The boundaries for nuclear variation were less clearly delimited geographically. Sites with mixtures of nuSSR groups were concentrated where prevailing winds arrived from several directions. Stronger between-site air flows increased nuSSR geneflow and genetic similarities, while populations receiving more wind flow were also more genetically variable.

Main Conclusions

Our study reveals how plant gene dispersal reflects air and water movements that in turn respond to geomorphologic complexity, thereby directly demonstrating the effects of wind on gene flow of plants with wind-borne insect pollinators. Wind data matching pollinator flight times and large sample sizes are crucial for testing wind effects.

查看原文本刊更多论文

风向和风力决定异质景观中昆虫传粉植物的遗传结构

目的植物繁殖体及其基因的传播对植物对景观异质性的响应至关重要，但其传播机制尚不清楚。榕属植物依靠风传榕蜂传粉，但气流对榕属植物遗传结构的影响研究却产生了相互矛盾的结果。我们的研究旨在通过研究地形复杂性如何与空气运动相互作用来影响遗传结构，从而阐明风在塑造风媒昆虫传粉植物遗传结构中的作用。中国西南部：四川、云南、广西、贵州。分类群榕。榕科、桑科。方法对中国西南地区地貌复杂性较高的56个tikoua遗址进行采样。整个采样地区的河流流域和主要风被可视化。在主要授粉季节，采样点之间的风连通性基于每小时的每日风数据进行建模。利用叶绿体DNA （cpDNA）和核SSR （nuSSR）标记重建了母本和双亲本位点的遗传结构。遗传结构、位置和风参数之间的联系通过Mantel或部分Mantel试验估计。结果该植物的母系遗传结构由河流系统定义，分别在长江流域和珠江流域具有两个不同的cpDNA群。核变异的地理界限不太明确。nuSSR混合组的地点集中在来自几个方向的盛行风到达的地方。更强的站点间气流增加了nuSSR基因流和遗传相似性，而接受更多风流量的种群也更具遗传变异。我们的研究揭示了植物基因传播如何反映空气和水的运动，而空气和水的运动反过来又响应地形的复杂性，从而直接证明了风对风媒昆虫传粉植物基因流动的影响。与传粉者飞行时间和大样本匹配的风数据对于测试风的影响至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Biogeography 环境科学-生态学

CiteScore

7.70

自引率

5.10%

发文量

203

审稿时长

2.2 months

期刊介绍： Papers dealing with all aspects of spatial, ecological and historical biogeography are considered for publication in Journal of Biogeography. The mission of the journal is to contribute to the growth and societal relevance of the discipline of biogeography through its role in the dissemination of biogeographical research.