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Sorghum as a Biological Model for Studying the Effect of Microbial Interactions on Growth and Metabolic Activity in Mining‐Impacted Soil
Author(s) -
Dhawi Faten,
Datta Rupali,
Wusirika Ramakrishna
Publication year - 2015
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.29.1_supplement.lb206
Subject(s) - nutrient , sorghum , arbuscular mycorrhiza , valine , biomass (ecology) , agronomy , biology , microorganism , mycorrhiza , shoot , food science , chemistry , bacteria , horticulture , botany , amino acid , symbiosis , biochemistry , ecology , genetics
The main challenge for plants growing in nutrient poor, metal‐contaminated soil is reduction in productivity due to nutrient deficiency as well as heavy metal toxicity. Our aim was to overcome these challenges using various microbial combinations, and study the potential beneficial impact of plant‐microbe interactions on plant physiological systems. In the current study, sorghum BTx623 seedlings planted in metal contaminated mining‐impacted soil were subjected to different microbial combinations. Following treatments were used: Plant growth promoting Bacteria (PGPB) isolated from metal contaminated sediments, PGPB + mycorrhizal fungi, mycorrhizal fungi alone and control group with no microbial treatment. The results indicate highest growth enhancement in plants treated with the mycorrhiza alone, followed by PGPB bacteria alone and PGPB and mycorrhiza mix in comparison with control. The increase in root biomass was accompanied with increase in uptake of primary nutrients, secondary nutrients and micronutrients in both shoots and roots. A total of 29 compounds were identified, out of which 23 showed significant changes in comparison to the control. The metabolites that changed significantly were those involved in starch and sucrose; and biosynthesis of amino acids such as alanine, aspartate and glutamate, galactose and valine, leucine and isoleucine.