P. fluorescensCHAO,P. fluorescensF113, and an
additional 350 PGPR strains were obtained from the School of Biotechnology, Suranaree University of Technology, Thailand. These
PGPR were isolated from soil from organic farms in different provinces of Thailand, including Chiangmai (1847
0
25
00
N/9858
0
54
00
E),
Lampang (1817
0
25
00
N/9930
0
25
00
E), Nakhon Sawan (1541
0
0
00
N/
1007
0
0
00
E), Saraburi (1451
0
0
00
N/10091
0
0
00
E), and Nakhon Ratchasima (1458
0
0
00
N/1027
0
0
00
E)