Characterizing endophytic competence and plant growth promotion of bacterial endophytes inhabiting the seed endosphere of Rice

Table 3 Comparison of plant growth promoting traits and physiological activities observed in different studies of bacterial endophytes

PGP trait or Putative Endophytic Trait	This study	Elbeltagy et al. (2001) [39]	Okunishi et al. (2005) [4]	Kaga et al. (2009) [12]	Palaniappan et al. (2010) [54]	Johnston-Monje and Raizada (2011) [58]	Hardoim 2011 [70]	Xu et al. (2014) [59]	Chimwamurombe et al. (2016) [35]	Average Occurrence
Total isolates tested	49	11	26	78	39	91	20	84	29
Catalase	49 (100%)	ND	26 (100%)	ND	ND	ND	13 (65%)	ND	ND	88/95 (93%)
Cellulase	45 (92%)	10 (91%)	ND	ND	ND	29 (32%)	8 (40%)	ND	ND	92/171 (54%)
Pectinase	47 (96%)	11 (100%)	ND	ND	ND	28 (32%)	ND	ND	ND	86/151 (60%)
Motility	20 (41%)	11 (100%)	26 (100%)	58 (74%)	ND	ND	12 (60%)	ND	ND	127/180 (71%)
Oxidase	35 (71%)	ND	18 (69%)	ND	ND	ND	14 (70%)	ND	ND	67/95 (71%)
IAA	49 (100%)	ND	ND	ND	28 (72%)	6 (7%)	9 (45%)	31 (40%)	27 (93%)	150/312 (48%)
ACCD	5 (10%)	ND	ND	ND	31 (79%)	18 (20%)	14 (70%)	5 (5%)	3 (10%)	76/312 (24%)
Siderophore	32 (65%)	ND	ND	ND	29 (74%)	5 (5%)	12 (60%)	20 (24%)	13 (45%)	111/312 (54%)
Phosphate solubilization	36 (73%)	ND	ND	ND	24 (62%)	63 (69%)	10 (50%)	31 (40%)	5 (17)	169/312 (54%)
Nitrogen Fixation	16 (33%)	ND	ND	ND	ND	27 (30%)	4 (20%)	76 (90%)	5 (17%)	138/273 (73%)
Spore formation	ND	ND	19 (73%)	ND	ND	ND	ND	ND	ND	19/26 (73%)
Salinity tolerance (6% NaCl and higher)	33 (67%)	ND	ND	ND	ND	ND	ND	ND	ND	33/49 (67%)
Osmotic Tolerance (0.6 M sucrose)	49 (100%)	ND	ND	54 (69%)	ND	ND	ND	ND	ND	103/127 (81%)
Osmotic Tolerance (1.2 M sucrose)	47 (96%)	ND	ND	ND	ND	ND	ND	ND	ND	47/49 (96%)
Amylase	ND	ND	ND	10 (13%)	ND	ND	2 (10%)	ND	ND	12/98 (12%)
Host Plant	Rice	Rice	Rice	Rice	Lesdepeza sp.	Maize	Rice	Tomato	Marama bean

ISSN: 1471-2180