Complex photobiont diversity in the marine lichen Lichina pygmaea
Complex photobiont diversity in the marine lichen Lichina pygmaea
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DOI：
10.1017/s002531542100062x
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发表时间：
2021-06-01
影响因子：
1.2
通讯作者：
Cunliffe, Michael
中科院分区：
文献类型：
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作者：
Chrismas, Nathan A. M.;Allen, Ro;Cunliffe, Michael
地衣是寄主真菌和真核藻类或蓝藻光生生物伙伴之间众所周知的共生关系(S)。最近的研究表明，陆地地衣还可以包含其他神秘的光生物，这些光生物可以增加地衣的生态适宜性，以响应不同的环境条件。与陆地地衣相比，海洋地衣生活在不同的生态系统中，因为它们经常淹没在海水中，因此对海洋地衣的研究要少得多。我们进行了细菌16S和真核生物18S rRNA基因的代谢编码调查，以评估海洋地衣Lichina pygmaea(Lightf.)C.Agardh，它广泛分布于大西洋海岸线的潮间带。我们发现，除了已建立的蓝藻光生生物Riugaria外，L.pygmaea显然还寄生了一系列其他海洋和淡水蓝藻，以及石藻科(绿藻)中的海洋真核藻类。我们认为，与多种淡水和海洋蓝藻以及真核生物的共生可能有助于该藻在潮间带恶劣波动的环境条件下生存。
Lichens are a well-known symbiosis between a host mycobiont and eukaryote algal or cyanobacterial photobiont partner(s). Recent studies have indicated that terrestrial lichens can also contain other cryptic photobionts that increase the lichens' ecological fitness in response to varying environmental conditions. Marine lichens live in distinct ecosystems compared with their terrestrial counterparts because of regular submersion in seawater and are much less studied. We performed bacteria 16S and eukaryote 18S rRNA gene metabarcoding surveys to assess total photobiont diversity within the marine lichen Lichina pygmaea (Lightf.) C. Agardh, which is widespread throughout the intertidal zone of Atlantic coastlines. We found that in addition to the established cyanobacterial photobiont Rivularia, L. pygmaea is also apparently host to a range of other marine and freshwater cyanobacteria, as well as marine eukaryote algae in the family Ulvophyceae (Chlorophyta). We propose that symbiosis with multiple freshwater and marine cyanobacteria and eukaryote photobionts may contribute to the ability of L. pygmaea to survive the harsh fluctuating environmental conditions of the intertidal zone.