科研之友
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摘要
A study was carried out for the phytoextraction of metals by S. munja with the interventions of growth-promoting bacteria isolated from fly ash (FA). It was observed that when a consortium of Bacillus endophyticus NBRFT4, Paenibacillus macerans NBRFT5, and Bacillus pumilus NBRFT9 was inoculated in the rhizospheric zone of S. munja, it not only enhanced metal uptake through mobilization but also promoted the plant growth. A combined effect of both factors accelerated the phytoextraction of nickel (Ni), zinc (Zn), and iron (Fe) by two- or three-fold. Plant growth and metal bioavailability both were promoted by the synthesis of siderophore (ACC), indole acetic acid (IAA), gibberellic acid, and cytokinins by bacteria. In addition, bacteria might also change the speciation of metals to make it more water soluble for plant uptake. Hence, a microbe-based phytoextraction of metals from contaminated sites may be recommended for use as an environmentally sound technology in place of conventional methods.
- 出版日期2013-11-30
