Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4

Harmful algal blooms caused by Karenia mikimotoi frequently occur worldwide and severely threaten the marine environment. In this study, the biochemical and physiological responses of K. mikimotoi to the algicidal bacterium Paracoccus homiensis O-4 were investigated, and the effects on the levels of...

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Autores principales:	Ning Ding, Yanbing Wang, Junfeng Chen, Siyu Man, Feng Lan, Chao Wang, Lijun Hu, Peike Gao, Renjun Wang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Karenia mikimotoi Paracoccus homiensis algicidal activity ROS photosynthesis Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/8cb308edc58d4bddbb04c3dfe7cccb08
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spelling	oai:doaj.org-article:8cb308edc58d4bddbb04c3dfe7cccb082021-12-01T17:04:50ZBiochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-41664-302X10.3389/fmicb.2021.771381https://doaj.org/article/8cb308edc58d4bddbb04c3dfe7cccb082021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmicb.2021.771381/fullhttps://doaj.org/toc/1664-302XHarmful algal blooms caused by Karenia mikimotoi frequently occur worldwide and severely threaten the marine environment. In this study, the biochemical and physiological responses of K. mikimotoi to the algicidal bacterium Paracoccus homiensis O-4 were investigated, and the effects on the levels of reactive oxygen species (ROS), malondialdehyde content, multiple antioxidant systems and metabolites, photosynthetic pigments, and photosynthetic index were examined. The cell-free supernatant in strain O-4 significantly inhibited K. mikimotoi cell growth. The bacterium caused the K. mikimotoi cells to activate their antioxidant defenses to mitigate ROS, and this effect was accompanied by the upregulation of intracellular antioxidant enzymes and non-enzyme systems. However, the overproduction of ROS induced lipid peroxidation and oxidative damage within K. mikimotoi cells, ultimately leading to algal death. In addition, the photosynthetic efficiency of the algal cells was significantly inhibited by O-4 and was accompanied by a reduction in photosynthetic pigments. This study indicates that O-4 inhibits K. mikimotoi through excessive oxidative stress and impaired photosynthesis. This research into the biochemical and physiological responses of K. mikimotoi to algicidal bacteria provides insights into the prophylaxis and control of harmful algal blooms via interactions between harmful algae and algicidal bacteria.Ning DingYanbing WangJunfeng ChenSiyu ManFeng LanChao WangLijun HuPeike GaoRenjun WangFrontiers Media S.A.articleKarenia mikimotoiParacoccus homiensisalgicidal activityROSphotosynthesisMicrobiologyQR1-502ENFrontiers in Microbiology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Karenia mikimotoi Paracoccus homiensis algicidal activity ROS photosynthesis Microbiology QR1-502
spellingShingle	Karenia mikimotoi Paracoccus homiensis algicidal activity ROS photosynthesis Microbiology QR1-502 Ning Ding Yanbing Wang Junfeng Chen Siyu Man Feng Lan Chao Wang Lijun Hu Peike Gao Renjun Wang Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4
description	Harmful algal blooms caused by Karenia mikimotoi frequently occur worldwide and severely threaten the marine environment. In this study, the biochemical and physiological responses of K. mikimotoi to the algicidal bacterium Paracoccus homiensis O-4 were investigated, and the effects on the levels of reactive oxygen species (ROS), malondialdehyde content, multiple antioxidant systems and metabolites, photosynthetic pigments, and photosynthetic index were examined. The cell-free supernatant in strain O-4 significantly inhibited K. mikimotoi cell growth. The bacterium caused the K. mikimotoi cells to activate their antioxidant defenses to mitigate ROS, and this effect was accompanied by the upregulation of intracellular antioxidant enzymes and non-enzyme systems. However, the overproduction of ROS induced lipid peroxidation and oxidative damage within K. mikimotoi cells, ultimately leading to algal death. In addition, the photosynthetic efficiency of the algal cells was significantly inhibited by O-4 and was accompanied by a reduction in photosynthetic pigments. This study indicates that O-4 inhibits K. mikimotoi through excessive oxidative stress and impaired photosynthesis. This research into the biochemical and physiological responses of K. mikimotoi to algicidal bacteria provides insights into the prophylaxis and control of harmful algal blooms via interactions between harmful algae and algicidal bacteria.
format	article
author	Ning Ding Yanbing Wang Junfeng Chen Siyu Man Feng Lan Chao Wang Lijun Hu Peike Gao Renjun Wang
author_facet	Ning Ding Yanbing Wang Junfeng Chen Siyu Man Feng Lan Chao Wang Lijun Hu Peike Gao Renjun Wang
author_sort	Ning Ding
title	Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4
title_short	Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4
title_full	Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4
title_fullStr	Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4
title_full_unstemmed	Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4
title_sort	biochemical and physiological responses of harmful karenia mikimotoi to algicidal bacterium paracoccus homiensis o-4
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/8cb308edc58d4bddbb04c3dfe7cccb08
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Biochemical and Physiological Responses of Harmful Karenia mikimotoi to Algicidal Bacterium Paracoccus homiensis O-4

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