Isolation and Characterization of Nodule-Associated Exiguobacterium sp. from the Root Nodules of Fenugreek (Trigonella foenum-graecum) and Their Possible Role in Plant Growth Promotion
Table 1
Plant growth-promoting characteristics of the Fenugreek NAB and Rhizospheric isolates.
Sr no.
Isolates
Cell wall characteristics
Siderophore (C) (μg/mL)*
Siderophore (H) (μg/mL)#
IAA (μg/mL)
Phosphate solubilization
Antifungal activity
1
M2EP1
−ve, CBa
+ b (449.5) c
+ (60) c
+ (43.68) c
—
+ Aa
2
M1N1
−ve, CB
+ (414.7)
+ (84)
+ (19.36)
—
+ A
3
M2N2b
−ve, CB
+ (403.1)
+ (64)
+ (20.64)
—
+ A
4
M2N2a
+ve B
+ (350.9)
—
+ (23.68)
—
+ A
5
M2N2c
+ve B
+ (907.7)
+ (39.2)
+ (31.68)
+
+ A
6
M1EP1
−ve, CB
+ (321.9)
+ (36.4)
+ (28.32)
—
+ (A, F)
7
M2N1a
−ve, CB
+ (287.1)
+ (42)
+ (13.56)
—
+ A
8
M2N1b
−ve, CB
+ (327.8)
+ (136.2)
+ (25.44)
—
+ A
9
M2EP2
+ve B
+ (501.7)
+ (78.4)
+ (62.64)
—
+ A
10
M2EP3
−ve, CB
+ (298.7)
—
+ (21.28)
+
+ A
11
M1N3
+ve B
+ (284.2)
—
+ (30.4)
—
+ A
12
M2N2d
−ve, CB
+ (507.5)
—
+ (21.28)
—
+ A
13
M1N2
−ve, CB
+ (246.5)
+ (56)
+ (29.76)
—
+ A
14
B1N1
+ve C
+ (232)
+ (53.2)
+ (20.8)
—
+ A
15
B1N2a
−ve, CB
+ (362.5)
—
+ (28.8)
—
+ A
16
B1N2b
+ve B
+ (205.9)
+ (50.4)
+ (21.28)
+
+ A
17
B1N3
−ve, CB
+ (481.4)
+ (103.6)
+ (29.28)
—
+A
Rhizospheric isolate
18
C1
+ve B
+ (301.6)
+ (47.6)
+ (20.64)
—
—
19
C2
+ve B
—
+ (156.8)
+ (36.96)
++
—
20
C3
+ve B
+ (284.2)
+ (44.8)
+ (20.96)
+++
—
21
R1
+ve B
+ (394.9)
+ (106.4)
+ (34.72)
++
—
22
R2
−ve, CB
+ (214.6)
+ (100.8)
+ (33.44)
—
—
23
R3
+ve B
+ (524.6)
+ (132.2)
+ (33.84)
+++
+ R
24
R4
+ve B
+ (261)
+ (154)
+ (41.12)
++
—
aCB: coccobacilli, B: bacilli and C: cocci, A: Alternaria; F: Fusarium and R: Rhizoctonia; b+ = production; cfigures indicated in bracket shows the concentration; *Catecholate siderophore was estimated by Arnow’s method [28], #hydroxamate siderophore was estimated by Gibson and Magrath method [28].
