Fuzia Elfituri Eltariki(1) and Mohamed Alsoul (1)*
(1).Department of Botany, Faculty of Science, Misurata University, Misurata, Libya.
(*Corresponding author: Mohamed Alsoul, E-mail: m.alsoul@yahoo.com
Tel: +218911929513)
Received:9/03/2024 Accepted: 29/07/2024
Abstract:
was grown under varied temperature conditions (7±1; 17±1; 27±1 and 33 ±1˚C). Growth rate, dry weight, chlorophyll a content, total carbohydrate content, total lipid content and cell ultrastructure were investigated when there was growth, whereas only cell ultrastructure, and survival were investigated when no growth was observed. Tetraselmis marina was able to grow under temperature ranged from 7±1˚C to 27±1˚C, with a relatively stable growth rate (0.69-0.91 division/day) and dry weight (0.188-0.241 gL-1) respectively. Decreasing in chlorophyll a content and total carbohydrate content were observed under low temperature; this was coupled with increasing in total lipid content. Whereas no growth observed when Tetraselmis marina was maintained at 33±1˚C. Transmission electron micrographs illustrate that, Tetraselmis marina grown under high temperature conditions (33±1˚C) forms non-motile cysts, these cysts are capable of rejuvenating when return to suitable growth temperature.
Key words: Tetraselmis marina, cysts, behavior, survival, Biochemical composition.
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