Record Details

Isolation and characterization of potential Zn solubilizing bacteria from soil and its effects on soil Zn release rates, soil available Zn and plant Zn content

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Isolation and characterization of potential Zn solubilizing bacteria from soil and its effects on soil Zn release rates, soil available Zn and plant Zn content
Not Available
 
Creator Dinesh,R., V. Srinivasan, S. Hamza, C. Sarathambal, S.J. Anke Gowda, A.N. Ganeshamurthy, S.B. Gupta, V. Aparna Nair, K.P. Subila, A. Lijina, V.C. Divya.
 
Subject Bacillus megaterium Biofortification Gluconic acid Plant Zn concentration Soil available Zn Soil Zn release Zn solubilizing bacteria
 
Description Not Available
In this study, experiments were designed to isolate, characterize and evaluate an array of bacteria isolates for
their Zn solubilization potential. Out of the six promising Zn solubilizing bacteria (ZnSB), ZnSB2 (B. megaterium,
KY687496) was found to be the most potential strain owing to its enhanced Zn solubilization in vitro. In the
quantitative study, the net Zn solubilized by ZnSB2 was significantly higher than those solubilized by the other
ZnSB at all days of sampling. Similar effects of ZnSB2 was observed in the soil per se, wherein the rate of release
of available Zn by ZnSB2 was markedly higher at all days of incubation (25.6%–40.7% of added Zn), with a peak
on the 8th day. Such enhanced rates of Zn release by ZnSB2 were attributed to marked decrease in pH owing to
enhanced gluconic acid production. In fact, gluconic acid production by ZnSB2 was 1884.7 ± 413.4 μgmL−1,
which was 35.3–69.7% greater than the other shortlisted ZnSB isolates. Further evaluation of ZnSB2 was done in
the green house using turmeric as the test crop. ZnSB2 was applied either alone or in combination with chemical
Zn (75% and 100% of recommended Zn). The results revealed that soil available Zn level in the treatment with
75% Zn+ZnSB2 (12.69 ± 2.96 mg kg−1) was on par with the level in the treatment with 100% Zn
(12.74 ± 2.63 mg kg−1) at 120 days after planting, while at harvest the treatment with 75% Zn+ZnSB2
maintained 65.0% higher available Zn levels than 100% Zn. The positive effect of ZnSB2 was also manifested on
rhizome yield, which was at par in the treatments with ZnSB2+75% Zn (154.2 g ± 36.0 pot−1) and 100% Zn
(177.2 ± 36.7 g pot−1). Besides, the Zn concentration in the rhizome was significantly higher (P < 0.05) in the
treatment with ZnSB2+75% Zn (40.5 ± 3.5 mg kg−1), which was at par with 100% Zn, but was greater by
98.5% compared to control. The study indicated that ZnSB2 strain was a potential candidate for enhanced Zn
dissolution in soil, which would allow reduced inorganic Zn application rates. Nonetheless, in vitro interaction
studies (dual culture) suggested that this strain was seriously lacking in disease suppressing traits. But its
compatibility with several plant growth promoting rhizobacteria enhanced the possibility of co-inoculation or
applying ZnSB2 in a consortium mode especially in condition wherein both soil Zn solubilization and disease
suppression becomes imperative.
ICAR Network Project on micronutrient management in horticultural crops for enhancing yield and quality headed by ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka State, India.
 
Date 2019-03-26T10:42:55Z
2019-03-26T10:42:55Z
2018-02-01
 
Type Article
 
Identifier 1
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/17667
 
Language English
 
Relation Not Available;
 
Publisher Elsevier