Vol. 3, Issue 4, Part D (2017)

Abstract
Siderophores are low molecular weight metal chelating agents which are produced by plants and microorganisms in Fe- limiting conditions. In this study bacteria were isolated from different soil sample and were characterized for PGPR traits. Biochemical characters were studied and the isolates were identified. Influence of different environmental factors, such as carbon source, nitrogen source, pH, temperature and salt stress, on siderophore production was studied. Isolates were further used to increase the fertility of the soil to help the plantlets grow well and increase the Fe content of the plantlets. It was found that different siderophore producing bacteria produced siderophore at different time and with different percentage. At different environmental condition the amount of siderophore produced was different. They also increased the iron concentration in plantlets grown in different soil samples.