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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
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- 한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제17권 제11호
- 발행연도
- 2007.1
- 수록면
- 1,805 - 1,810 (6page)
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Purple nonsulfur bacteria were isolated from river
sediments and their growth promoting capabilities on tomato
were examined. Isolated strains KL9 and BL6 were identified
as Rhodopseudomonas spp. by 16S rDNA sequence analysis.
Rhodopseudomonas strain KL9 maximally produced 5.56 mM/
min/mg protein and 67.2 μM/min/mg protein of indole-3-acetic
acid (IAA) and 5-aminolevulinic acid (ALA), respectively, which
may be one of the mechanisms of plant growth enhancement. The
germination percentage of tomato seed, total length, and dry mass
of germinated tomato seedling increased by 30.2%, 71.1%, and
270.8%, respectively, compared with those of the uninoculated
control 7 days after inoculation of strain KL9. The lengths of
the root and shoot of germinated seedling treated with 3 mM
tryptophan, a precursor of IAA, increased by 104.4% and
156.5%, respectively, 7 days after inoculation of strain KL9.
Rhodopseudomonas KL9 increased 123.5% and 54% of the
root and shoot lengths of germinated seedling, respectively,
treated with 15 mM glycine and succinate, precursors of ALA.
This plant growth promoting capability of purple nonsulfur
bacteria may be a candidate for a biofertilizer in agriculture.
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