Antioxidant response of the microalga Dunaliella salina under salt stress : Botanica Marina

www.degruyter.com uses cookies, tags, and tracking settings to store information that help give you the very best browsing experience.
To understand more about cookies, tags, and tracking, see our Privacy Statement
I accept all cookies for the De Gruyter Online site

Jump to ContentJump to Main Navigation

Botanica Marina

Editor-in-Chief: Dring, Matthew


IMPACT FACTOR increased in 2014: 1.402
5-year IMPACT FACTOR: 1.643

SCImago Journal Rank (SJR) 2014: 0.552
Source Normalized Impact per Paper (SNIP) 2014: 0.810
Impact per Publication (IPP) 2014: 1.356

VolumeIssuePage

Issues

Antioxidant response of the microalga Dunaliella salina under salt stress

1 / Bhavanath Jha1

1Discipline of Marine Biotechnology and Ecology, Central Salt and Marine Chemicals Research Institute (CSMCRI), Council of Scientific and Industrial Research (CSIR), G.B. Marg, Bhavnagar-364021, Gujarat, India

Citation Information: Botanica Marina. Volume 54, Issue 2, Pages 195–199, ISSN (Online) 1437-4323, ISSN (Print) 0006-8055, DOI: 10.1515/bot.2011.012, March 2011

Publication History

Received:
2010-05-12
Accepted:
2010-11-12
Published Online:
2011-03-15

Abstract

Hydrogen peroxide content in Dunaliella salina cells increases concomitantly with salinity, and maximum content occurred at 5.0 m NaCl concentration. Activity of the antioxidant enzyme superoxide dismutase (SOD, EC 1.15.1.1) increased significantly by two- and three-fold in 1.0 and 2.0 m salt concentrations, respectively, thereafter declining significantly. Unlike SOD, catalase (EC 1.11.1.6) activity decreased in tandem with salinity; however, there was no significant decrease in catalase activity up to 2.0 m salt concentration (compared to 0.5 m salinity). There was no significant decrease in catalase activity from 2.0 m to 5.0 m salinity, whereas a significant decrease was observed in 4.0 and 5.0 m salinity (compared to 1.0 m salinity). Ascorbic acid peroxidase (EC 1.11.1.11) activity decreased concurrently with salt stress up to 2.0 m, thereafter no significant change was observed in cells grown in varying salt concentrations (0.5–5.0 m NaCl). Detailed study of hydrogen peroxide content and antioxidant enzymes in response to varying salinity (0.5–5.0 m NaCl) has not been reported previously in Dunaliella salina. Antioxidant enzymes and H2O2 scavenging systems have short-term adaptation mechanisms for protection against salt stress and are not important in imparting salt stress tolerance to Dunaliella salina at high salinity because of production of secondary antioxidant metabolites, like β-carotene, which protect the alga against salt induced oxidative damages.

Keywords: antioxidant; catalase; Dunaliella; peroxidase; superoxide dismutase

Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

[2]
Saijin Zhang, Yuelu Jiang, Chi-Shuo Chen, Danielle Creeley, Kathleen A. Schwehr, Antonietta Quigg, Wei-Chun Chin, and Peter H. Santschi
Aquatic Toxicology, 2013, Volume 126, Page 214

Comments (0)

Please log in or register to comment.