الفهرس | Only 14 pages are availabe for public view |
Abstract The distribution and variation, in abundance of the microscopic algae are as yet difficultto account for except in vague and general terms. These microscopic algae are the primary producers of the organic matter on which all other forms of aquatic life depend.They in turn limit the efficiency with which both fresh water and the sea can be exploitedas sources of food, for human being and animals, as chemical derivatives or harmful as toxins. Undoubtedly, more extensive and detailed observations of microscopic algaepopulations and environmental factors in natural waters will contribute greatly to understandingof what is taking place, by studies in the laboratory with cultures of microscopicalgae under precisely controlled conditions also have an indispensable part to play.Full understanding of the growth of these microscopic algae will be achieved onlyby the synthesis of the results of physiological and biochemical investigations and theresultsof the field studies. It is the purpose of this work to study the principle features of the growth of the microscopichalotolerant green alga Dunaliella salina in cultures as well as to elucidate otherproblemsin biochemistry and cell physiology. There are several ill-defined species of Dunaliella. All these species are unicellulargreen algae (Chlorophyceae) belonging to order Volvocales. The cells are ovoidin shape (8-25 urn length and 5-15 width) and equipped by two equal anterior fagella (Butcher, 1959). Such alga contains a large cup-shaped chloroplast with a single pyrenoidsurrounded by polysaccharide granules embedded in the basal portion. |