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（疣衣科）的共同扩散策略塑造了一种不同寻常的地衣种群结构。

The co-dispersal strategy of (Verrucariaceae) shapes an unusual lichen population structure.

作者信息

Yang ChunYan, Zhou QiMing, Shen Yue, Liu LuShan, Cao YunShu, Tian HuiMin, Cao ShuNan, Liu ChuanPeng

机构信息

aSchool of Life Science and Technology, Harbin Institute of Technology.

bChosenMed Technology Company Limited.

出版信息

Mycoscience. 2024 May 2;65(3):138-150. doi: 10.47371/mycosci.2024.02.007. eCollection 2024.

DOI:10.47371/mycosci.2024.02.007
PMID:39233758
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11369309/
Abstract

The reproduction and dispersal strategies of lichens play a major role in shaping their population structure and photobiont diversity. Sexual reproduction, which is common, leads to high lichen genetic diversity and low photobiont selectivity. However, the lichen genus adopts a special co-dispersal model in which algal cells from the photobiont and ascospores from the mycobiont are released together into the environment. To explore the dispersal strategy impact on population structures, a total of 62 individuals and 12 related Verrucariaceae genera individuals, representing co-dispersal strategy and conventional independent dispersal mode were studied. Phylogenetic analysis revealed that , with a large-scale geographical distribution, showed an extremely high specificity of symbiotic associations with their photobiont. Furthermore, three types of group I intron at 1769 site have been found in most mycobionts, which showed a high variety of group I intron in the same insertion site even in the same species collected from one location. This study suggested that the ascospore-alga co-dispersal mode of resulted in this unusual mycobiont-photobiont relationship; also provided an evidence for the horizontal transfer of group I intron that may suggest the origin of the complexity and diversity of lichen symbiotic associations.

摘要

地衣的繁殖和扩散策略在塑造其种群结构和光合生物多样性方面起着重要作用。常见的有性繁殖导致地衣遗传多样性高，而光合生物选择性低。然而，该属地衣采用一种特殊的共同扩散模式，即来自光合生物的藻类细胞和来自真菌共生体的子囊孢子一起释放到环境中。为了探究扩散策略对种群结构的影响，共研究了62个个体以及12个相关的疣衣科属个体，分别代表共同扩散策略和传统的独立扩散模式。系统发育分析表明，该属地衣具有大规模的地理分布，与其光合生物的共生关联具有极高的特异性。此外，在大多数真菌共生体的1769位点发现了三种I类内含子，即使在从同一地点采集的同一物种中，同一插入位点的I类内含子也表现出高度的多样性。这项研究表明，该属地衣的子囊孢子-藻类共同扩散模式导致了这种不同寻常的真菌共生体-光合生物关系；同时也为I类内含子的水平转移提供了证据，这可能暗示着地衣共生关联的复杂性和多样性的起源。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/df41169cece5/MYC-65-138-g05.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/ddcb28795b2f/MYC-65-138-g01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/0af8864179c0/MYC-65-138-g02.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/7b44c3145b5c/MYC-65-138-g03.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/e74c1c35996f/MYC-65-138-g04.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/df41169cece5/MYC-65-138-g05.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/ddcb28795b2f/MYC-65-138-g01.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/0af8864179c0/MYC-65-138-g02.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/7b44c3145b5c/MYC-65-138-g03.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/e74c1c35996f/MYC-65-138-g04.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1f3/11369309/df41169cece5/MYC-65-138-g05.jpg

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本文引用的文献

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How to build a lichen: from metabolite release to symbiotic interplay.如何构建地衣：从代谢物释放到共生相互作用。
New Phytol. 2023 May;238(4):1362-1378. doi: 10.1111/nph.18780. Epub 2023 Mar 4.
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Photobiont Diversity in Lichen Symbioses From Extreme Environments.极端环境中地衣共生体中的光合生物多样性
Front Microbiol. 2022 Mar 29;13:809804. doi: 10.3389/fmicb.2022.809804. eCollection 2022.
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MEGA11: Molecular Evolutionary Genetics Analysis Version 11.MEGA11：分子进化遗传学分析版本 11。
Mol Biol Evol. 2021 Jun 25;38(7):3022-3027. doi: 10.1093/molbev/msab120.
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Lichen fungi have low cyanobiont selectivity in maritime Antarctica.地衣真菌在南极海洋地区对蓝藻共生体的选择性较低。
New Phytol. 2003 Oct;160(1):177-183. doi: 10.1046/j.1469-8137.2003.00859.x.
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Ecophysiological, morphological, and biochemical traits of free-living Diplosphaera chodatii (Trebouxiophyceae) reveal adaptation to harsh environmental conditions.游离双鞭藻（Trebouxiophyceae）的生理生态、形态和生物化学特性揭示了其对恶劣环境条件的适应性。
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