Effect of molybdenum,vitamin [C] and vitamin [B[1]] on the growth criteria, photosynthetic pigments and metabolic activities of stressed-scenedesmus obliquus cultures

ABSTRACT

The growth criteria [cell count and dry weight] and total photosynthetic pigments, total carbohydrates, total proteins, free amino acids and praline of stressed- Scenedesmus obliquus cultures were significantly increased up to the level 3 ppm of MoCl[2] of that the control cultures, there above the values all these parameters were significantly decreased. When treated stressed-Scenedesmus obliquus cultures with 200 ppm of either ascorbic acid or thlamine were both supplemented of them separately, the growth criteria, total photosynthetic pigments, total proteins, free amino acids and praline of stressed-Scenedesmus obliquus cultures were significantly increased, as comparison with that the control cultures. Conversely, the total carbohydrate contents significantly decreased, when the algal cultures subjected to various levels [1.5, 3 and 4.5 ppm] of MoCl[2] and treated with 200 of either ascorbic acid or thiamine