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Table 1 Physiological characterization, hydrolytic, plant growth promoting, and pathogenic attributes of G. arilaitensis LJH19

From: Comparative genomics and physiological investigation supported safety, cold adaptation, efficient hydrolytic and plant growth-promoting potential of psychrotrophic Glutamicibacter arilaitensis LJH19, isolated from night-soil compost

Characteristic

G. arilaitensis LJH19

Source

Night-soil compost

Growth condition a

 Temperature range

4–37 °C (10 °C)

 pH range

7–11 (7)

 NaCl range

1–9% (1%)

Hydrolysis on agar plates b

 Corn starch

+ ve (15)

 Carboxymethylcellulose (CMC)

+ ve (5.66)

 Birchwood xylan

+ ve (2.8)

 Tributyrin

+ ve (1.8)

Enzyme assays

 Amylase

186.76 ± 19.28 U/mg

 Cellulase

21.85 ± 0.7 U/mg

 Xylanase

11.31 ± 0.51 U/mg

PGP trait

 IAA production

166.11 ± 5.7 μg/ml

 Siderophore productionc

85.72 ± 1.06% siderophore unit (1.5)

 Phosphate solubilisationd

44.76 ± 1.5 μg/ml (2.3)

 Ammonia production

0.20 ± 0.01 μmoles/ml

 Germination Index (GI)

116.348 ± 38.02%

Pathogenic potential

 Haemolysis on blood agar

- ve

 Protease production

0.17 ± 0.002 U/mg

 Biofilm production

- ve at 37 °C, weak producer at 15 °C

 Antibiotic susceptibility test

AZM−, AMP−, CIP−, CHL−, E−, G−, K−, P−, RIF−, S−, TE−, VA−

  1. Values in parentheses indicate aOptimum growth condition, benzymatic index at 10 °C, c Siderophore producing index; d phosphate solubilization index; +: Resistant; −: Sensitive; AZM: 15 mcg, Azithromycin; AMP: 10 mcg, Ampicillin; CIP: 5 mcg, Ciprofloxacin; CHL: 30 mcg, Chloramphenicol; E: 15 mcg Erythromycin; G:10 mcg, Gentamycin; K: 30 mcg, Kanamycin; P: 10 Units, Penicillin-G; RIF: 5 mcg, Rifampicin; S: 10 mcg, Streptomycin; TE: 30 mcg, Tetracycline; VA: 30 mcg, Vancomycin