干旱区生态环境知识资源中心(Arid): Impacts of ultraviolet radiation on certain physiological and biochemical processes in cyanobacteria inhabiting diverse habitats

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DOI	10.1016/j.envexpbot.2018.10.037
	Impacts of ultraviolet radiation on certain physiological and biochemical processes in cyanobacteria inhabiting diverse habitats
	Rajneesh 1; Pathak, Jainendra 1; Richa 1; Haeder, Donat-P.2; Sinha, Rajeshwar P.1
通讯作者	Sinha, Rajeshwar P.
来源期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
EISSN	1873-7307
出版年	2019
卷号	161 页码:375-387
英文摘要	Certain physiological and biochemical processes of Fischerella sp. strain HKAR-13 and Nostoc sp. strain HKAR-2 isolated from paddy field and hot spring respectively were studied in response to ultraviolet radiation (UVR). Cultures were irradiated under varying combinations of UV-B, UV-A and photosynthetically active radiation (PAR). Significant decrease in chlorophyll a content was observed in Nostoc sp. strain HKAR-2 (19.31 to 4.08 mu g/gfw) and Fischerella sp. strain HKAR-13 (13.55 to 3.40 mu g/gfw) after 72 h of PAR + UV-A + UV-B (PAB) treatment. Total carotene content increased upto 36 h where as phycocyanin content decreased as exposure time increased in both the cyanobacteria. Photosystem II (PSII) activity decreased to about 88% and 93% in Nostoc sp. strain HKAR-2 and Fischerella sp. strain HKAR-13 respectively. Antioxidative activities of superoxide dismutase and catalase increased to 1.8-6.0 fold after 48 h of UVR exposure as compared to non-irradiated cultures. Additionally, Fischerella sp. strain HKAR-13 was also able to synthesize scytonemin that carry out UV-screening but its synthesis was not observed in Nostoc sp. strain HKAR-2. UVR also resulted in 3-5 fold increase in reactive oxygen species in Fischerella sp. strain HKAR-13 and 2.0-4.5 fold increase in Nostoc sp. strain HKAR-2. Significant decrease in ds DNA content and increase in malondialdehyde content was observed in both cyano-bacterial strains. These results revealed that combined effects of UV-A + UV-B was more deleterious than UV-A and UV-B alone and Fischerella sp. strain HKAR-13 was more prone to UVR as compared to Nostoc sp. strain HKAR-2, a hot spring isolate. The more resistant cyanobacterium Nostoc sp. strain HKAR-2 can be used as inoculant in desert soil and production of various value added products.
英文关键词	Cyanobacteria Ultraviolet radiation (UVR) Catalase (CAT) Superoxide dismutase (SOD) Reactive oxygen species (ROS)
类型	Article
语种	英语
国家	India ; Germany
收录类别	SCI-E
WOS记录号	WOS:000466823000033
WOS关键词	UV-B RADIATION ; OXIDATIVE STRESS ; ANABAENA SP ; NOSTOC SP ; ANTARCTIC CYANOBACTERIA ; ANTIOXIDANT SYSTEMS ; NITROGEN-FIXATION ; DNA-DAMAGE ; REPAIR ; PHYCOBILIPROTEINS
WOS类目	Plant Sciences ; Environmental Sciences
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215387
作者单位	1.Banaras Hindu Univ, Inst Sci, Ctr Adv Study Bot, Lab Photobiol & Mol Microbiol, Varanasi 221005, Uttar Pradesh, India; 2.Friedrich Alexander Univ, Dept Biol, Neue Str 9, D-91096 Mohrendorf, Germany
推荐引用方式 GB/T 7714	Rajneesh,Pathak, Jainendra,Richa,et al. Impacts of ultraviolet radiation on certain physiological and biochemical processes in cyanobacteria inhabiting diverse habitats[J],2019,161:375-387.
APA	Rajneesh,Pathak, Jainendra,Richa,Haeder, Donat-P.,&Sinha, Rajeshwar P..(2019).Impacts of ultraviolet radiation on certain physiological and biochemical processes in cyanobacteria inhabiting diverse habitats.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,161,375-387.
MLA	Rajneesh,et al."Impacts of ultraviolet radiation on certain physiological and biochemical processes in cyanobacteria inhabiting diverse habitats".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 161(2019):375-387.