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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Thiravetyan, Paitip
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Agriculture, Biological Sciences & Forestry Environmental Science

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Improvement of Trimethylamine Uptake by Euphorbia milii: Effect of Inoculated Bacteria Siswanto, Dian; Thiravetyan, Paitip
Journal of Tropical Life Science Vol 6, No 2 (2016)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.06.02.11

Abstract

In the last few years, a great emphasis has been placed on phytoremediation of indoor air pollution studies. However, limited work has been addressed to observe the bacteria potential to assist the phytoremediation process of trimethylamine (TMA). In this work, the ability of 4 different bacteria for individual TMA removal and IAA production were observed. In addition, the enhancement of TMA removal efficiency by Euphorbia milii with various inoculating bacteria were investigated. Bacillus thuringiensis, Citrobacter amalonaticus Y19, Bacillus nealsonii, and white colony-soil bacteria (WCSB) were able to absorb TMA and produce IAA individually. B. thuringiensis and C. amalonaticus Y19 were the two most effective bacteria to improve TMA removal efficiency by the plant. Since concentrations of IAA production by individual bacterium were highly correlated with TMA removal efficiency by plants in early periods of fumigation and highly correlated with leaf IAA production of bacterially inoculated plants, two predicted mechanisms on improving TMA uptake by bacterially inoculated plants are presented: (1) bacteria migration from plant roots to leaves increases leaf IAA concentration and (2) increasing concentration of bacterially inoculated root IAA inhibits transportation of IAA from leaves to roots, resulting in higher leaf IAA concentration. The higher concentration of leaf IAA is suggested to be a factor to increase stomatal opening which improves TMA removal efficiency of the plant.
Reduction of Cadmium Uptake of Rice Plants Using Soil Amendments in High Cadmium Contaminated Soil: A Pot Experiment Siswanto, Dian; Suksabye, Parinda; Thiravetyan, Paitip
Journal of Tropical Life Science Vol 3, No 2 (2013)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aims of this study were to investigate the effect of agricultural residues on reducing cadmium uptake in rice plants. The rice plants growing on no cadmium/free cadmium soils (N), Cd soils (Cds), and Cd soils each amended with 1% w/w of coir pith (CP), coir pith modified with sodium hydroxide (CPm) and corncob (CC) under high cadmium contaminated soil with an average 145 mg Cd kg-1 soil were investigated. The results showed that the cumulative transpiration of rice grown in various treatments under high cadmium contaminated soil followed the order: Cds > CPm ≥ CP ≥ CC. These transpirations directly influenced cadmium accumulation in shoots and husks of rice plants. The CC and CP seemed to work to reduce the cadmium uptake by rice plants indicated by accumulated cadmium in the husk that were 2.47 and 7.38 mg Cd kg-1 dry weight, respectively. Overall, transpiration tended to drive cadmium accumulation in plants for rice grown in high cadmium contaminated soil. The more that plants uptake cadmium, the lower cadmium that remains in the soil. Keywords: Transpiration, Cadmium Uptake, Rice plant, Agricultural Residues
Co-Authors Dian Siswanto Suksabye, Parinda