In the present study, rhizosphere soil samples from paddy fields were collected from twenty different locations of Cuddalore District, Tamil Nadu. The occurrence of Azospirillum population in the rhizosphere soils of paddy plant grown at nineteen selected locations was studied. The location, namely Pinnalur recorded the maximum community population of Azospirillum (8.98 cfu × 105 g-1). Twenty different Azospirillum isolates were isolated and identified in the present study. The Azospirillum isolates were designated as “AZO” (AZO - 1 to AZO - 19). The maximum IAA and Gibberellic acid production by Azospirillum was recorded by the isolate AZO - 7 (88.72 μg 25 ml-1 of broth and 9.72 μg 25 ml-1 of broth).
John Milton D and Manivannan M, 2017, Prevalence of azospirillum isolates in paddy rhizosphere soils ofdifferent locations in cuddalore district, tamil nadu,International Journal of Current Science and Technology,Vol.5, Issue, 2, pp.350-352