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- 자료유형
- 학술저널
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- 한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제22권 제1호
- 발행연도
- 2012.1
- 수록면
- 1 - 12 (12page)
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The present study examines the effects of 30 mg/kg butachlor on the cyanobacterial diversity of rice fields in Eastern Uttar Pradesh and Western Bihar in India. A total of 40 samples were grouped into three classes [(i)acidic, (ii) neutral, and (iii) alkaline soils], based on physicochemical and principle component analyses. Acidic soils mainly harbored Westillopsis, Trichormus, Anabaenopsis,and unicellular cyanobacteria; whereas Nostoc, Anabaena,Calothrix, Tolypothrix, and Aulosira were found in neutral and alkaline soils. Molecular characterization using 16S rRNA PCR and DGGE revealed the presence of 13different phylotypes of cyanobacteria in these samples.
Butachlor treatment of the soil samples led to the disappearance of 5 and the emergence of 2 additional phylotypes. A total of 40 DGGE bands showed significant reproducible changes upon treatment with butachlor.
Phylogenetic analyses divided the phylotypes into five major clusters exhibiting interesting links with soil pH.
Aulosira, Anabaena, Trichormus, and Anabaenopsis were sensitive to butachlor treatment, whereas uncultured cyanobacteria, a chroococcalean member, Westillopsis,Nostoc, Calothrix, Tolypothrix, Rivularia, Gloeotrichia,Fischerella, Leptolyngbya, and Cylindrospermum, appeared to be tolerant against butachlor at their native soil pH.
Butachlor-induced inhibition of nitrogen fixation was found to be 65% (maximum) and 33% (minimum) in the soil samples of pH 9.23 and 5.20, respectively. In conclusion,low butachlor doses may prove beneficial in paddy fields having a neutral to alkaline soil pH.
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참고문헌 (24)
참고문헌 신청
Ateeq, B. / 2002 / Clastogenicity of pentachlorophenol, 2,4-D and butachlor evaluated by Allium root tip test / Mutat. Res 514 : 105 ~ 113
Berrendero, E. / 2008 / Genetic and morphological characterization of Rivularia and Calothrix (Nostocales, Cyanobacteria) from running water / ISJEM 58 : 447 ~ 460
Boutte, C. / 2005 / Testing of primers for the study of cyanobacterial molecular diversity by DGGE / J. Microbiol. Methods 65 : 542 ~ 550
Castenholz, R. W. / 2001 / Phylum BX. Cyanobacteria. Oxygenic photosynthetic bacteria, In Bergey’s Manual of Systematic Bacteriology, 2nd Ed. Vol. 1 / Springer : 473 ~ 487
Chen, W. C. / 2009 / Effects of herbicide butachlor on soil microorganisms and on nitrogen-fixing abilities in paddy soil / Ecotoxicol. Environ. Saf 72 : 120 ~ 127
Berrendero, E. / 2008 / Genetic and morphological characterization of Rivularia and Calothrix (Nostocales, Cyanobacteria) from running water / ISJEM 58 : 447 ~ 460
Boutte, C. / 2005 / Testing of primers for the study of cyanobacterial molecular diversity by DGGE / J. Microbiol. Methods 65 : 542 ~ 550
Castenholz, R. W. / 2001 / Phylum BX. Cyanobacteria. Oxygenic photosynthetic bacteria, In Bergey’s Manual of Systematic Bacteriology, 2nd Ed. Vol. 1 / Springer : 473 ~ 487
Chen, W. C. / 2009 / Effects of herbicide butachlor on soil microorganisms and on nitrogen-fixing abilities in paddy soil / Ecotoxicol. Environ. Saf 72 : 120 ~ 127
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