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

IF 1.5 4区 生物学 Q4 MYCOLOGY
ChunYan Yang, QiMing Zhou, Yue Shen, LuShan Liu, YunShu Cao, HuiMin Tian, ShuNan Cao, ChuanPeng Liu
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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 Endocarpon 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 Endocarpon individuals and 12 related Verrucariaceae genera individuals, representing co-dispersal strategy and conventional independent dispersal mode were studied. Phylogenetic analysis revealed that Endocarpon, 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 Endocarpon 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 Endocarpon 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.

Endocarpon(Verrucariaceae)的共同散布策略形成了不寻常的地衣种群结构
地衣的繁殖和传播策略在形成其种群结构和光生物多样性方面起着重要作用。常见的有性繁殖会导致地衣遗传多样性高而光生物选择性低。然而,Endocarpon地衣属采用了一种特殊的共散播模式,即来自光生菌体的藻细胞和来自霉生菌体的子囊孢子一起被释放到环境中。为了探讨散布策略对种群结构的影响,研究人员对62个Endocarpon个体和12个相关的Verrucariaceae属个体进行了研究,这些个体分别代表了共散布策略和传统的独立散布模式。系统发育分析表明,Endocarpon 的地理分布范围很广,其与光生物体的共生关系具有极高的特异性。此外,在大多数 Endocarpon 真菌的 1769 位点上发现了三种类型的 I 组内含子,即使在同一地点采集到的同一物种中,同一插入位点上的 I 组内含子的种类也很多。这项研究表明,Endocarpon 的 ascospore-alga 共散布模式导致了这种不寻常的分生孢子-光附生体关系;同时也为 I 组内含子的水平转移提供了证据,这可能是地衣共生关系复杂性和多样性的起源。
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来源期刊
Mycoscience
Mycoscience MYCOLOGY-
CiteScore
3.00
自引率
7.10%
发文量
32
审稿时长
3 months
期刊介绍: Mycoscience is the official English-language journal of the Mycological Society of Japan and is issued bimonthly. Mycoscience publishes original research articles and reviews on various topics related to fungi including yeasts and other organisms that have traditionally been studied by mycologists. The research areas covered by Mycoscience extend from such purely scientific fields as systematics, evolution, phylogeny, morphology, ecology, physiology, biochemistry, genetics, and molecular biology, to agricultural, medical, and industrial applications. New and improved applications of well-established mycological techniques and methods are also covered.
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