Abstract:
Eight isolates of Agrobacterium tumefaciens, which could tolerate 1.5M NaCI, were used to inoculate Triticum aestivum seeds. The inoculated seeds were then grown in different concentrations of NaCl (0, 50. 100, 150, 200 and 250mM) for 10 days. Seed germination was delayed and adversely affected whereas seedling growth was markedly reduced under salt stress conditions. Some A. tumefaciens provoked germination under NaCl stress, while three isolates i.e., DSI, ALI and AA2 significantly improved the growth of wheat seedling (shoot and root lengths) over non-inoculated respective treatments, when grown in different concentrations of salt. Dry weight/gram fresh weight increased progressively with increasing salt concentration. Bacterial inoculation affected, either by increasing or decreasing, this parameter of seedling. With the inoculation of three strains (DSI, ALI & AA2), improvement in seedling, growth and reduction in dry weight increment (dry weight/gram fresh weight) under all salt concentrations was observed. Since stress conditions caused increase in dry weight of plants, reduction in dry weight accumulation in inoculated seedlings under salt concentrations might reflect some relief from stress.
Page(s):
337-342
DOI:
DOI not available
Published:
Journal: Science International, Volume: 3, Issue: 4, Year: 1991