Abstract. Wulandari AD, Meitiniarti VI, Kasmiyati S. 2024. Interaction between Eichornia crassipes with Microbacterium sp. SpR3 and Micrococcus luteus RT-9 in Cr6+ reduction in liquid media. Biodiversitas 25: 957-963. Water Pollution caused by Cr6+ contamination is difficult to remove from the environment. One of the efforts to reduce Cr6+ contamination in water is by bioremediation. Bioremediation using the interaction of rhizosphere bacteria with aquatic plants can be employed to decrease the content of Cr6+ in water environment. This study aimed to determine the effect of adding Microbacterium sp. SpR3, Micrococcus luteus RT-9, and a mixture of both bacteria on the ability of Eichornia crassipes to reduce the concentration of Cr6+ in the growth media and the plant's growth potential. This study was conducted in the Microbiology Laboratory of the Faculty of Biology at Satya Wacana Christian University. Eichornia crassipes plans of similar size were grown in 450 mL of Hoaglands solution with Cr6+ 5 mg.L-1 in a container. The treatment in this study involves the addition of 50 mL (10% of the working volume) of Microbacterium sp SpR3 culture, Micrococcus luteus RT- 9, and a combination of both Cr6+-reducing bacteria. The reduction rate of Cr6+ concentration in the mixture of both types of bacteria reached 88.06%, which was higher compared to the control without the addition of the inoculum (87.08%). The inoculation of both Cr6+ reducing bacteria did not hibit the growth rate of the plants. The ability of Microbacterium sp. SpR3 and Micrococcus luteus RT-9 to reduce Cr6+ in liquid media can be employed in the bioremediation of Cr6+ contaminated wastewater. 

pdf/interaction-between-eichornia-crassipes-with-microbacterium-20ot8ffq53.pdf

Interaction between Eichornia crassipes with Microbacterium sp. SpR3 and Micrococcus luteus RT-9 in Cr6+ reduction in liquid media

Risk assessment of four toxic heavy metals in terrestrial and aquatic ecosystems around BSCIC tannery industrial estate of Savar, Dhaka, Bangladesh

The present study was conducted to assess the accumulation of chromium in water hyacinth plant (Eichhornia crassipes) through its growing medium. The water hyacinth plant was collected from pond and treated with different concentration of K2Cr2O7. The effect of chromium accumulation on growth and biochemical parameters of plant was observed. The results revealed that the heavy metal uptake by plant root was increased with increase in concentration of Cr in test solution while the translocation of absorbed Cr was very low to other part of plant in comparison to root. Relative growth rate, biomass productivity, total chlorophyll and carotenoid content were reduced with increased concentration of Cr in test solution. However, ascorbic acid concentration showed negative correlation with other parameters. It was found to be increased with increasing concentration of Cr in test solution. Proline content in plant showed a different trend. It initially increased with increase in Cr concentration in test solution and time and then followed a decreasing order.

https://environcj.in/wp-content/uploads/issues/2017/12/ECJ-143-148_Madan.pdf

Uptake of chromium in water hyacinth (Eichhornia crassipes) and its impact on biochemical structure

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Uptake of chromium in water hyacinth (Eichhornia crassipes) and its impact on biochemical structure