Biochemical responses of red alga Gracilaria corticata (Gracilariales, Rhodophyta) to salinity induced oxidative stress

Kumar, Manoj; Kumari, Puja; Gupta, Vishal; Reddy, C. R. K.; Jha, Bhavanath

doi:10.1016/j.jembe.2010.06.001

Cited by 122 publications

(87 citation statements)

References 31 publications

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“…This arrangement assists in the process of photoprotection of chlorophyll a by preventing the intensity of light and radiation from reaching this important pigment (Watanabe & Ikeuchi 2013;Kaňa et al 2014). Finally, APC, PC and PE serve as antioxidants to prevent oxidative stress (Cano-Europe et al 2010;Kumar et al 2010). The lowest concentrations of these three accessory pigments were verified in the 30 psu treatment (Tab.…”

Section: Discussionmentioning

confidence: 84%

Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)

et al. 2017

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Salinity is an important abiotic factor since it is responsible for the local and/or regional distribution of algae. In coastal regions, salinity changes with prevailing winds, precipitation and tide, and particularly in extreme intertidal conditions. Acanthophora spicifera is a red seaweed that occurs in the supratidal region in which changes in abiotic conditions occur frequently. Th is study evaluated the eff ects of salinity on the metabolism and morphology of A. spicifera. Algae were acclimatized under culture conditions with sterilized seawater for seven days. Experiments used diff erent salinities (15 to 50 psu) for seven days, followed by metabolic analyses. Th is study demonstrates that extreme salinities aff ect physiological parameters of A. spicifera, such as decrease in growth rate, as well as morphological parameters and concentrations of secondary metabolites. Acanthophora spicifera exhibited high tolerance to 25 to 40 psu, with little change in physiology, which favors the occurrence of this species in diverse environments. However, 15, 20, 45 and 50 psu were the most damaging and led to loss of biomass, depigmentation of apices, and the highest concentrations of antioxidant metabolites. Th e 50 psu treatment caused the greatest changes in general, greatly reducing a biomass and chlorophyll content, and facilitating the presence of endophytes.

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Section: Discussionmentioning

confidence: 84%

Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)

et al. 2017

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“…Sulfated polysaccharides extracted from the studied marine seaweeds such as cladophoran polysaccharide, fucoidan and agar have been described as possessing diverse biological activities with potential medicinal value, such as anti-inflammatory, antiproliferative, antiviral, anticancer, immunomodulatory, anticoagulant and antithrombotic activities, and are novel functional ingredients in the cosmetics and food industries (Kumar et al 2011;Souza et al 2012;Wijesinghe and Jeon 2012).…”

Section: Identification Of Polysaccharidesmentioning

confidence: 99%

Variation in bioactive compounds in some seaweeds from Abo Qir bay, Alexandria, Egypt

Ismail

Gheda

Pereira

2015

Rend. Fis. Acc. Lincei

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This study aims to assess the bioactive compounds and antioxidant activities of three selected seaweeds [Cladophora pellucida (Chlorophyta), Padina tetrastromatica (Phaeophyta) and Laurencia papillosa (Rhodophyta)] collected from Abo Qir bay, Alexandria, Egypt. L. papillosa demonstrated the greatest DPPH radical scavenging activity (52.1 ± 1.23 %) and β carotene content (3675.6 ± 134.6 IU/100 g) in comparison with the other seaweed species. The highest contents of phenol (0.26 ± 0.005 mg/g DW) and flavonoid (5.6 ± 0.8 mg CE/ 100 g DW) were observed in P. tetrastromatica and C. pellucida, respectively. P. tetrastromatica showed the highest ascorbic acid content (26.0 ± 0.98 mg%). Nineteen fatty acid methyl esters were detected in the tested seaweeds by gas chromatography, while C. pellucida had the highest total concentrations of fatty acids and the highest omega 3 and omega 6 fatty acids. Polysaccharides (cladophoran, fucoidan and agar) were identified in C. pellucida, P. tetrastromatica and L. papillosa, respectively, by Fourier transform infrared with attenuated total reflectance. These findings recommend the studied seaweeds to be used as a novel source of natural bioactive compounds and antioxidant agents for food supplements, cosmetics and pharmaceutical industries.

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“…Although Gracilaria has been reported to grow at low saline conditions (Bird and McLachlan, 1986), reduced growth (Graham and Wilcox, 2000;Jong et al, 2015) and bleaching (Jong et al, 2015) have been noticed. Loss of thallus rigidity has been reported at low salinity levels (Kumar et al, 2010). Salinity level has been reported to affect growth in red algae (Daugherty and Bird, 1988) and both low and high salinity levels inhibited culture growth in earlier reports (Cai, 2011).…”

Section: Resultsmentioning

confidence: 91%

Investigating the Effects of Exogenous Factors on Growth, Photosynthetic Pigments and Bud Induction in Gracilaria corticata var. cylindrica under In vitro Conditions

Anuraj¹,

Waman²,

Prakāsh³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Biochemical responses of red alga Gracilaria corticata (Gracilariales, Rhodophyta) to salinity induced oxidative stress

Cited by 122 publications

References 31 publications

Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)

Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)

Variation in bioactive compounds in some seaweeds from Abo Qir bay, Alexandria, Egypt

Investigating the Effects of Exogenous Factors on Growth, Photosynthetic Pigments and Bud Induction in Gracilaria corticata var. cylindrica under In vitro Conditions

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