Journal Paper

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Journal: سلول و بافت
Year:1392 | Volume:4 | Issue:1
Start Page:85 | End Page:102

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Title

COMPARATIVE STUDY OF SOME PHYSIOLOGICAL CHARACTERISTICS (CHLOROPHYLL CONTENT, PHOTOSYNTHETIC ACTIVITY…) IN SELECTION OF DUNALIELLA SP. STRAINS (ISOLATED FROM IRANIAN WATERS)

Writers

MADADKAR HAGHJOU M.

Pages

 Start Page 85 | End Page 102

Abstract

 Aim: DUNALIELLA as a phytoplanktonic unicellular alga is important in aquatic organism nutrition (special in salinity waters). CHLOROPHYLL (chl) content in relation to other algal biomass characteristics was studied under different culture media conditions for better strain selection.Material and methods: Different Iranian and foreign strains alga were exposed to NITRATE deficiency, light, iron and salt increasing treatments. Then some physiological characters such as chls contents, cell number, dry weight, PHOTOSYNTHESIS and respiration were measured in control and treated samples.Results: Different stresses caused decreasing cell number, chls contents and also changing in chla /chlb ratio from 5 to 15. The amount of chl a and total chl on a per cell basis (10-6 cells), at all conditions and the chl a amount per ml, only at control showed positive or possitive is correct significant correlation with strains dry weight. Chla or total chl per 106 cells had negative significant correlation with cell numbers per ml in all of conditions.Conclusion: Algal biomass evaluation that almost is assessed by chla content, do not have a direct relationship with the cell number or dry weight at all cases. Therefore, the higher dry weight, chl content and also cell divisions introduced as better and more suitable indicators for strain selection than others. Strains 10 and 11, having more dry weight at both conditions (control and treatments) nearly with the higher chl content, then 4, 6 and 13 could be introduced.

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