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

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

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  
  1. ND – not determined