Publication Date:
2021-05-19
Description:
Dunaliella sp. is from division of chlorophyte algae that has a global distribution and is abundantly
reported in the coastal waters of Chabahar Bay. This algae is a euryhalin species which may support
high temperatures and lack of Nitrogen conditions in the sea. Also as a response to environmental
stresses it fluctuates pigment reserves specially the Beta-Carotene. The aim of this study was effects
of salinity on growth, chlorophyll and β-carotene concentration in Dunaliella sp. In this study in
beyond the separation and purification of Dunaliella sp. from seawater, the impact of different levels
of salinity (0.5, 0.75, 1, 1.5, 2, 3 and 4 mol NaCl) on growth, the amount of chlorophyll and βcarotene were measured during a period of 4 weeks. Chlorophyll a, b and β-carotene contents were
determined spectrophotometrically from algal pellets using 80% (v/v) acetone/water mixture. Results
showed that the Dunaliella sp. in treatments of 0.5, 0.75, 1, 1.5, 2, 3 and 4 mol NaCl could grow, but
the maximum growth of this algae and the maximum amount of β-carotene were observed in salinities
between 1.5 to 2 mol NaCl (p〈0.05). Parallel to growth of the algae the production of chlorophyll a
and b was increased in all salinities treatments but their production causes a decrease in β- carotene
production.
Description:
Published
Keywords:
Dunaliella sp.
;
Chlorophyll
;
Growth
;
Salinity
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Refereed
Format:
pp.71-82
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