The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability

Photo-induced behavioral responses (photobehaviors) are crucial to the survival of motile phototrophic organisms in changing light conditions. Volvocine green algae are excellent model organisms for studying the regulatory mechanisms of photobehavior. We recently reported that unicellular Chlamydomo...

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Autores principales:	Asuka Tanno, Ryutaro Tokutsu, Yoko Arakaki, Noriko Ueki, Jun Minagawa, Kenjiro Yoshimura, Toru Hisabori, Hisayoshi Nozaki, Ken-ichi Wakabayashi
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6e9c09a598994d7da45381bdff718f98
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spelling	oai:doaj.org-article:6e9c09a598994d7da45381bdff718f982021-11-04T06:19:41ZThe four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability1932-6203https://doaj.org/article/6e9c09a598994d7da45381bdff718f982021-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8547699/?tool=EBIhttps://doaj.org/toc/1932-6203Photo-induced behavioral responses (photobehaviors) are crucial to the survival of motile phototrophic organisms in changing light conditions. Volvocine green algae are excellent model organisms for studying the regulatory mechanisms of photobehavior. We recently reported that unicellular Chlamydomonas reinhardtii and multicellular Volvox rousseletii exhibit similar photobehaviors, such as phototactic and photoshock responses, via different ciliary regulations. To clarify how the regulatory systems have changed during the evolution of multicellularity, we investigated the photobehaviors of four-celled Tetrabaena socialis. Surprisingly, unlike C. reinhardtii and V. rousseletii, T. socialis did not exhibit immediate photobehaviors after light illumination. Electrophysiological analysis revealed that the T. socialis eyespot does not function as a photoreceptor. Instead, T. socialis exhibited slow accumulation toward the light source in a photosynthesis-dependent manner. Our assessment of photosynthetic activities showed that T. socialis chloroplasts possess higher photoprotection abilities against strong light than C. reinhardtii. These data suggest that C. reinhardtii and T. socialis employ different strategies to avoid high-light stress (moving away rapidly and gaining photoprotection, respectively) despite their close phylogenetic relationship.Asuka TannoRyutaro TokutsuYoko ArakakiNoriko UekiJun MinagawaKenjiro YoshimuraToru HisaboriHisayoshi NozakiKen-ichi WakabayashiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Asuka Tanno Ryutaro Tokutsu Yoko Arakaki Noriko Ueki Jun Minagawa Kenjiro Yoshimura Toru Hisabori Hisayoshi Nozaki Ken-ichi Wakabayashi The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability
description	Photo-induced behavioral responses (photobehaviors) are crucial to the survival of motile phototrophic organisms in changing light conditions. Volvocine green algae are excellent model organisms for studying the regulatory mechanisms of photobehavior. We recently reported that unicellular Chlamydomonas reinhardtii and multicellular Volvox rousseletii exhibit similar photobehaviors, such as phototactic and photoshock responses, via different ciliary regulations. To clarify how the regulatory systems have changed during the evolution of multicellularity, we investigated the photobehaviors of four-celled Tetrabaena socialis. Surprisingly, unlike C. reinhardtii and V. rousseletii, T. socialis did not exhibit immediate photobehaviors after light illumination. Electrophysiological analysis revealed that the T. socialis eyespot does not function as a photoreceptor. Instead, T. socialis exhibited slow accumulation toward the light source in a photosynthesis-dependent manner. Our assessment of photosynthetic activities showed that T. socialis chloroplasts possess higher photoprotection abilities against strong light than C. reinhardtii. These data suggest that C. reinhardtii and T. socialis employ different strategies to avoid high-light stress (moving away rapidly and gaining photoprotection, respectively) despite their close phylogenetic relationship.
format	article
author	Asuka Tanno Ryutaro Tokutsu Yoko Arakaki Noriko Ueki Jun Minagawa Kenjiro Yoshimura Toru Hisabori Hisayoshi Nozaki Ken-ichi Wakabayashi
author_facet	Asuka Tanno Ryutaro Tokutsu Yoko Arakaki Noriko Ueki Jun Minagawa Kenjiro Yoshimura Toru Hisabori Hisayoshi Nozaki Ken-ichi Wakabayashi
author_sort	Asuka Tanno
title	The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability
title_short	The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability
title_full	The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability
title_fullStr	The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability
title_full_unstemmed	The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability
title_sort	four-celled volvocales green alga tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/6e9c09a598994d7da45381bdff718f98
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The four-celled Volvocales green alga Tetrabaena socialis exhibits weak photobehavior and high-photoprotection ability

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