SALT TOLERANCE AND PHB PRODUCTION OF Rhizobium FRANK ISOLATES OF ROOT NODULES OF WILD Vicia aintabensis BOISS. HAUSSKN. EX BOISS

Abstract

This study was performed in order to determine the tolerance of Rhizobium Frank isolates obtained from root nodules of wild Vicia aintabensis Boiss. amp; Hausskn. ex Boiss to different NaCl concentrations (0, 100, 150, 200, 250, 300, 350, 400 and 450mM) and to determine the effects of these different salt concentrations on poly-β-hydroxybutyric acid (PHB) production of the isolates. The results showed that the isolates showed different salt tolerance responses. V4.6 isolate was found to be the most affected isolate by salt concentrations. The PHB yield of the isolates (in terms of cell dry weight) was between 0,62-27%. Increasing salt concentrations inhibited isolate growths but stimulated PHB accumulation. PHB production by root nodule isolates under salt–stress conditions was discussed.

Keywords

• poly-β-hydroxybutyric acid
• wild vicia aintabensis boiss. hausskn. ex boiss
• isolate
• salt concentration
• poli-β-hidroksibütirik asit
• yabani vicia aintabensis boiss. hausskn. ex boiss
• izolat
• tuz konsantrasyonu