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Environmental Science & Technology 2018
Journal of Environmental Research
Page 56
March 29-31, 2018
Vienna, Austria
4
th
Edition of International Conference on
Environmental Science
& Technology 2018
S
aline soils are widely distributed across the world. The
application of beneficial microorganisms is a novel technology
to reduce salt stress and improve plant productivity. Phosphate-
solubilizing microorganisms (PSM) are a group of plant growth-
promoting rhizobacteria, which can dissolve insoluble phosphates
and maintain the nutrient status of salt soil. To identify efficient
PSMwith multiple activities that promote the plants to grow in the
salinesoil,weconductedasurveyofPSMnaturallycolonizingsaline
soil of the Yellow River, China. A total of 42 PSMs were isolated,
the majority clustered together as
Bacillus
spp., one
Providencia
rettgeri
sp. strain was confirmed as PSM for the first time. The
capacity of dissolving inorganic phosphorus analysis was carried
out by agar plate and liquid culture. Ten isolates classified as the
best solubilizers with solubilization rates greater than 200 mg/L.
In contrast, the PSM isolates were less effective when solubilizing
ferric phosphate (FePO
4
) or aluminum phosphate (AlPO
4
). The
organic acid types and content were tested by high performance
liquid chromatography (HPLC) method. Eight different organic
acids (oxalic acid, gluconic acid, lactic acid, succinic acid,
formic acid, citric acid and malic acid and propionic acid) with
different content were detected in the culture filtrates. Isolates
were also checked for indole-3-acetic acid (IAA), siderophore
and exopolysaccharide. All of the isolates could secrete IAA
within the range 2.7~31.8 mg L/1 and exopolysaccharide within
the range 74.3~225.7 mg L/1. There were 12 (28.6% of the total
strains) siderophore-producing strains with the siderophore unit of
1.9~42.1%. This initial study on PSM isolates distributed in saline
soil showed that some isolates show promise for potential use as
bio-inoculants for promoting plant growth in saline environments.
Biography
Huanhuan Jiang is pursuing her PhD degree in Environmental Engineering
at Harbin Industrial University and will complete her PhD in June 2018. Her
research interests cover the theory and application of resources recovery
from waste (water)/bio solids, organic wastes (excess sludge, waste bio-
mass, etc.) cascade utilization to recover bio resources and/or bioenergy,
soil restoration and soil fertility by Microbial e.g. She has participated in the
project of China Agriculture Research System, The National Natural Science
Foundation of China etc. At the period of her graduate study, her four papers
were under review.
767360114@qq.comIsolation and characterization of phosphate-solubilizing
microorganisms with bio control potential from salt-affected soil
Huanhuan Jiang
1
, Peishi Qi
1
, Shanlin Yu
2
, Tong Wang
2
, Mian Wang
2
, Mingna
Chen
2
, Na Chen
2
, Xiaoyuan Chi
2
and
Lijuan Pan
2
1
Harbin Institute of Technology, China
2
Shandong Peanut Research Institute, China
Huanhuan Jiang et al., J Environ Res, Volume 2