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Heat-Stress Responses Differ among Species from Different 'Bangia' Clades of Bangiales (Rhodophyta)

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Title: Heat-Stress Responses Differ among Species from Different 'Bangia' Clades of Bangiales (Rhodophyta)
Authors: Khoa, Ho Viet Browse this author
Kumari, Puja Browse this author
Uchida, Hiroko Browse this author
Murakami, Akio Browse this author
Shimada, Satoshi Browse this author
Mikami, Koji Browse this author
Keywords: Bangia atropurpurea
'Bangia' sp.
heat stress
asexual reproduction
stress memory
Issue Date: Aug-2021
Publisher: MDPI
Journal Title: Plants-basel
Volume: 10
Issue: 8
Start Page: 1733
Publisher DOI: 10.3390/plants10081733
Abstract: The red alga 'Bangia' sp. ESS1, a 'Bangia' 2 clade member, responds to heat stress via accelerated asexual reproduction and acquires thermotolerance based on heat-stress memory. However, whether these strategies are specific to 'Bangia' 2, especially 'Bangia' sp. ESS1, or whether they are employed by all 'Bangia' species is currently unknown. Here, we examined the heat-stress responses of 'Bangia' sp. ESS2, a newly identified 'Bangia' clade 3 member, and Bangia atropurpurea. Intrinsic thermotolerance differed among species: Whereas 'Bangia' sp. ESS1 survived at 30 degrees C for 7 days, 'Bangia' sp. ESS2 and B. atropurpurea did not, with B. atropurpurea showing the highest heat sensitivity. Under sublethal heat stress, the release of asexual spores was highly repressed in 'Bangia' sp. ESS2 and completely repressed in B. atropurpurea, whereas it was enhanced in 'Bangia' sp. ESS1. 'Bangia' sp. ESS2 failed to acquire heat-stress tolerance under sublethal heat-stress conditions, whereas the acquisition of heat tolerance by priming with sublethal high temperatures was observed in both B. atropurpurea and 'Bangia' sp. ESS1. Finally, unlike 'Bangia' sp. ESS1, neither 'Bangia' sp. ESS2 nor B. atropurpurea acquired heat-stress memory. These findings provide insights into the diverse heat-stress response strategies among species from different clades of 'Bangia'.
Type: article
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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