title: Growth response of Avena sativa in amino-acids-rich soils converted from phenol-contaminated soils by Corynebacterium glutamicum.
abstract: The biodegradation of phenol in laboratory-contaminated soil was investigated using the Gram-positive soil bacterium Corynebacterium glutamicum. This study showed that the phenol degradation caused by C. glutamicum was greatly enhanced by the addition of 1% yeast extract. From the toxicity test using Daphnia magna, the soil did not exhibit any hazardous effects after the phenol was removed using C. glutamicum. Additionally, the treatment of the phenolcontaminated soils with C. glutamicum increased various soil amino acid compositions, such as glycine, threonine, isoleucine, alanine, valine, leucine, tyrosine, and phenylalanine. This phenomenon induced an increase in the seed germination rate and the root elongation of Avena sativa (oat). This probably reflects that increased soil amino acid composition due to C. glutamicum treatment strengthens the plant roots. Therefore, the phenol-contaminated soil was effectively converted through increased soil amino acid composition, and additionally, the phenol in the soil environment was biodegraded by C. glutamicum.
authors.affiliation: Department of Bioprocess Engineering, Chonbuk National University, Jeonju 561-756, Korea, Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, Korea.
authors.forename: Soo Youn
authors.initials: SY
authors.lastname: Lee
authors.forename: Bit-Na
authors.initials: BN
authors.lastname: Kim
authors.forename: Yong Woo
authors.initials: YW
authors.lastname: Choi
authors.forename: Kye Sang
authors.initials: KS
authors.lastname: Yoo
authors.forename: Yang-Hoon
authors.initials: YH
authors.lastname: Kim
authors.forename: Jiho
authors.initials: J
authors.lastname: Min
mesh_terms: D000596:Amino Acids / Q000032:analysis* / Q000378:metabolism; D018554:Avena / Q000254:growth & development* / Q000378:metabolism / Q000382:microbiology; D001673:Biodegradation, Environmental; D048230:Corynebacterium glutamicum / Q000378:metabolism*; D019800:Phenol / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D012987:Soil; D012989:Soil Pollutants; D019800:Phenol