Patterns of fungal–algal symbiont association in Usnea aurantiaco-atra reveal the succession of lichen–moss communities in Fildes Peninsula, Antarctica

Usnea aurantiaco-atra is the most widespread flora in Fildes Peninsula. There are two growth types of U. aurantiaco-atra: the erect form on rocks and the prostrate form associated with mosses. Phylogenetic analysis showed that individuals of the two growth forms share genotypes. Moreover, haploid di...

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Bibliographic Details
Published in:Polar Research
Main Authors: Shunan Cao, Fang Peng, Hongyuan Zheng, Feng Wang, Chuanpeng Liu, Qiming Zhou
Format: Article in Journal/Newspaper
Language:English
Published: Norwegian Polar Institute 2017
Subjects:
Haplotype
ITS rDNA
linkage disequilibrium
mycobiont
populations
reproduction
Environmental sciences
GE1-350
Oceanography
GC1-1581
Fildes
Fildes peninsula
Antarc*
Antarctica
Polar Research
Online Access:https://doi.org/10.1080/17518369.2017.1374123
https://doaj.org/article/71c16cf30f7349658a05ef19aa7993e8
Description
Summary:Usnea aurantiaco-atra is the most widespread flora in Fildes Peninsula. There are two growth types of U. aurantiaco-atra: the erect form on rocks and the prostrate form associated with mosses. Phylogenetic analysis showed that individuals of the two growth forms share genotypes. Moreover, haploid disequilibrium testing indicated no significant genetic difference for the two growth forms when fungal and algal internal transcribed spacer rDNA were treated as two alleles of one lichen individual. The two growth forms of U. aurantiaco-atra appear to reflect different stages of lichen–moss community succession. A mode is proposed for demonstrating the occurrence of this succession.

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