Improvement of cadmium phytoremediation after soil inoculation with a cadmium-resistant Micrococcus sp

Environmental Science and Pollution Research International
Chirawee SangthongBenjaphorn Prapagdee

Abstract

Cadmium-resistant Micrococcus sp. TISTR2221, a plant growth-promoting bacterium, has stimulatory effects on the root lengths of Zea mays L. seedlings under toxic cadmium conditions compared to uninoculated seedlings. The performance of Micrococcus sp. TISTR2221 on promoting growth and cadmium accumulation in Z. mays L. was investigated in a pot experiment. The results indicated that Micrococcus sp. TISTR2221significantly promoted the root length, shoot length, and dry biomass of Z. mays L. transplanted in both uncontaminated and cadmium-contaminated soils. Micrococcus sp. TISTR2221 significantly increased cadmium accumulation in the roots and shoots of Z. mays L. compared to uninoculated plants. At the beginning of the planting period, cadmium accumulated mainly in the shoots. With a prolonged duration of cultivation, cadmium content increased in the roots. As expected, little cadmium was found in maize grains. Soil cadmium was significantly reduced with time, and the highest percentage of cadmium removal was found in the bacterial-inoculated Z. mays L. after transplantation for 6 weeks. We conclude that Micrococcus sp. TISTR2221 is a potent bioaugmenting agent, facilitating cadmium phytoextraction in Z. mays L.

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Citations

Apr 12, 2016·Environmental Geochemistry and Health·Muhammad RizwanFakhir Hannan
Jan 10, 2020·International Journal of Phytoremediation·Muhammad Mahmood-Ul-HassanRizwan Ahmad
Jul 2, 2017·Environmental Science and Pollution Research International·Benjaphorn Prapagdee, Jiraporn Wankumpha
Jun 14, 2020·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Samaneh AbdollahiFatemeh Shahryari
Aug 26, 2021·Environmental Science and Pollution Research International·Muhammad TahirMuhammad Kamran

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