Journal
ACTA PHYSIOLOGIAE PLANTARUM
Volume 28, Issue 3, Pages 195-203Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/BF02706531
Keywords
Chlorella vidgaris; growth; jasmonic acid; monosaccharides; pH; photosynthetic picments; soluble proteins
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The present study was undertaken to test the influence of exogenous applied jasmonic acid upon the growth and changes in sonic metabolites levels in the cells of green alga Chlorella vulgaris Beijerinck (Chlorophyceae). It was found, that JA in algal cells acted in a concentration-dependent manner. Treatment with JA at high concentrations range of 10(-5)-10(-4) M, resulted in the decrease in cell number and reduction of major photosynthetic pigments, monosaccharides, soluble cellular and extracellular proteins levels as well as decrease in pH of the medium. In contrast to 10(-5) and 10(-4) M JA, this phytohormone applied at 10(-8)-10(-6) M induced the increase in cell number, photosynthetic pigments and monosaccharides contents, significant accumulation and extracellular secretion of soluble proteins over control and neutralization of the medium. Quantitative changes in polypeptide pattern of total cellular proteins after treatment with the optimal concentration of 10(-7) M JA oil the 7(th) day of cultivation as analyzed by SDS-PAGE, was also observed. JA induced synthesis de novo of 15 specific polypeptides with molecular weight 334-16 kDa which weren't detected in the control. The data suggest that JA plays a important role in algal growth and development.
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