Page 2 Plant-Bacteria Interactions Edited by Iqbal Ahmad, John ...

Table 14.3 Biochemical characteristics of some salt-tolerant rhizobacteria.
Biochemical
(enzyme)
characteristics
A. globiformis
ArG1
A. tumescens
ArT16
M. phlei
MbP18
B. amyloliquefaciens
BcA12
Casein hydrolysis þ a
þ
Pectin decomposition þ þ þ
Gelatin liquefaction þ þ
Citrate utilization þ þ þ þ þ
Arginine dihydrolase þ
Acetylmethylcarbinol þ þ
Oxidase þ þ þ þ þ
Catalase þ þ
Lypase þ þ þ þ þ
Tryptophanase þ
Nitrate reductase þ þ þ þ þ
Amylase þ þ þ þ þ
Collagenase þ þ þ
Protease þ þ
Pectinase
Lecithinase
þ þ þ
Urease þ þ þ þ
Nitrogenase þ þ þ
a þ and indicate the presence or absence of activity of a particular microorganism.
P. rathonis
PsR47
Bacteria that grow in nitrogen-free media are most probably unable to grow in
higher concentrations of carbohydrates as carbon and energy sources. But carbohydrate
utilization for M. phlei MbP18 was found to be different as they produce acids
from glucose, arabinose, xylose, glycose, saccharose, maltose, glycerol and mannitol.
The results of our study showed that many salt-tolerant rhizobacterial strains were
capable of producing B vitamins and amino acids (Table 14.5). B vitamins and
Table 14.4 Carbohydrate fermentation patterns of salt-tolerant rhizobacteria.
Carbon source
A. globiformis
ArG1
a
A. tumescens
ArT16
Arabinose
þ
Xylose þ
Glucose
Galactose
þ
Saccharose
Lactose
Maltose
þ
Glycerol þ
Mannitol þ
14.5 Physiological Characterization of Rhizobacteriaj267
M. phlei
MbP18
a þ and indicate the presence or absence of activity of a particular microorganism.
P. rathonis
PsR47