Phenetic and Molecular Diversity of Nitrogen Fixating Plant Growth Promoting Azotobacter Isolated from Semiarid Regions of India

Table 1

PGPR activities of Azotobacter isolates.

Isolates	IAA (μg/ml)	PSI (cm)	SPI (cm)	HCN production	NH3 production
Azo1				++	++
Azo2		NS		++	++
Azo3		NS		+++	+++
Azo4				+++	+++
Azo5		NS		+	++
Azo6		NS		+++	++
Azo7				+++	+++
Azo8		NS		+++	+++
Azo9		NS		+++	++
Azo10		NS		+++	+++
Azo11		NS		+++	+++
Azo12		NS		++	++
Azo13		NS		+++	++
Azo14				+	++
Azo15				+++	+++
Azo16		NS		++	++
Azo17		NS		+++	+++
Azo18		NS		+++	++
Azo19		NS		+++	++
Azo20				++	+
Azo21		NS		+++	+++
Azo22		NS		+++	++
Azo23		NS		+	+++
Azo24				+++	+

. NS: no solubilization; PSI: phosphorus solubilizing index; SPI: siderophore production index.