title: Oxidative stress tolerance in intertidal red seaweed Hypnea musciformis (Wulfen) in relation to environmental components.
abstract: Oxidative stress parameters in relation to temperature and other factors have been analysed in Hypnea musciformis, the red seaweed from Anjuna beach, Goa, with an aim to understand its susceptibility to the changing seasons. The results indicate that elevated temperature, sunshine and dessication during peak summer in May enhanced the activity of lipid peroxide, hydrogen peroxide and antioxidants such as catalase, glutathione and ascorbic acid. Statistical tests using multivariate analysis of variance and correlation analysis showed that oxidative stress and antioxidants maintain significant relation with temperature, salinity, sunshine and pH at an individual or interactive level. The dissolved nitrates, phosphates and biological oxygen demand in ambient waters and the trace metals in seaweeds maintained sufficiently low values to provide any indication that could exert contaminant oxidative stress responses. The present field studies suggest that elevated antioxidant content in H. musciformis offer sufficient relief to sustain against harsh environmental stresses for its colonization in the rocky intertidal zone.
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Bejing Normal University, Bejing, 100875, People's Republic of China. dusmant999@gmail.com.
authors.forename: Dusmant
authors.identifier: http://orcid.org/0000-0001-8877-3670
authors.initials: D
authors.lastname: Maharana
authors.affiliation: Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, 403004, India.
authors.forename: Priya Brata
authors.initials: PB
authors.lastname: Das
authors.affiliation: Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, 403004, India.
authors.forename: Xivanand N
authors.initials: XN
authors.lastname: Verlecar
authors.affiliation: Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, 403004, India.
authors.forename: Navnath M
authors.initials: NM
authors.lastname: Pise
authors.affiliation: Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, 403004, India.
authors.forename: Manguesh
authors.initials: M
authors.lastname: Gauns
mesh_terms: D000222:Adaptation, Physiological; D000975:Antioxidants / Q000378:metabolism*; D018384:Oxidative Stress; D000461:Rhodophyta / Q000378:metabolism / Q000502:physiology*; D054712:Salinity; D012624:Seaweed / Q000378:metabolism / Q000502:physiology*; D013312:Stress, Physiological
chemical_list: D000975:Antioxidants
keywords: Catalase; Lipid peroxidation; Metal; Seaweed; Temperature