Commenced in January 2007
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Edition: International
Paper Count: 60768
The Combined Influences of Salinity, Light and Nitrogen Limitation on the Growth and Biochemical Composition of Nannochloropsis sp. and Tetraselmis sp., Isolated from Penang National Park Coastal Waters, Malaysia

Authors: Mohamed M. Alsull

Abstract:

In the present study, two microalgae species “Nannochloropsis sp. and Tetraselmis sp.” isolated from Penang National Park coastal waters, Malaysia; were cultivated under combined various laboratory conditions “salinity, light, nitrogen limitation and starvation”. Growth rate, dry weight, chlorophyll a content, total lipid and protein contents, were estimated at mid exponential growth phase. Both Nannochloropsis sp. and Tetraselmis sp. showed remarkable decrease in growth rate, chlorophyll a content and protein content companied with increase in lipid content under nitrogen limitation and starvation conditions. Maintaining Nannochloropsis sp. under salinity 15‰ caused only significant decrease in total protein content; while Tetraselmis sp. grown at the same salinity caused decrease in the growth rate, chlorophyll a, dry weight and total protein content only when nitrogen was available.

Keywords: Light, Microalgae, Salinity, biochemical composition, nitrogen limitation

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