Home|Journals|Articles by Year|Audio Abstracts
 

Original Research

Nig. J. Basic Appl. Sci.. 2016; 24(2): 85-91
doi: 232258


Effect of Salinity on the Growth Parameters of Halotolerant Microalgae, Dunaliella spp.

Aminu Lailaba Abubakar.




Abstract

: Dunaliella strains (T35, T36 and T37) were isolated from saline river of Namibia. The effects of salinity stress on their growth and pigment content was investigated. The specific growth rate (µ) of Dunaliella was established in a controlled environment. NaCl concentration has a strong effect on the growth rate and generation time of these halotolerant microalgae. Dunaliella strains were shown to withstand large variations of salinity of the growth medium, 0.5 - 4.0 M NaCl. The optimum conditions for their growth were 1.0 M NaCl at 30 oC, pH 7.5 to 9.0 and 45 µmol m-2 s-1. Increasing salinity from 1.0 to 4.0 M NaCl decreased cell density by 40 %. Increased cellular chlorophyll content was observed form 2 to 14 days of inoculation for all the three strains investigated. However, after day 10 of inoculation there was no significant difference in the pigment content per cell in all strains (p ≤ 0.05). This study shows that there is a good relationship between growth rate and efficient photosynthetic apparatus during the cultivation.

Key words: Dunaliella, salinity stress, chlorophyll, specific growth rate






Full-text options


Share this Article


Online Article Submission
• ejmanager.com




ejPort - eJManager.com
Refer & Earn
JournalList
About BiblioMed
License Information
Terms & Conditions
Privacy Policy
Contact Us

The articles in Bibliomed are open access articles licensed under Creative Commons Attribution 4.0 International License (CC BY), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.