지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.12
- 수록면
- 67 - 72 (6page)
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Some rhizosphere bacteria can stimulate the plant growth through various direct or indirect methods. We isolated some rhizobacteria producing a high amount of phytohormone, indole acetic acid (IAA) and indole butyric acid (IBA) from the rhizosphere of several crops, and examined their growth promoting capability on tomato (Lycopersicon esculentum). Isolated strains SW5, JJ3 and E were identified as Acinetobacter guillouiae, Klebsiella variicola, Enterobacter aerogenes by 16S rDNA sequencing, and they produced 13.4, 1.2, and 1.4 ㎎ protein<SUP>-1</SUP> of IAA and 7.4, 1.8, and 0.8 ㎎ IBA mg protein<SUP>-1</SUP> of IBA, respectively. In the microcosm test for the growth promotion of tomato by the rhizobacterial isolates of 10? cells g<SUP>-1</SUP> soil, strains E, JJ3 and SW5 increased the shoot length and fresh weight of tomato plant by 79, 41 and 17% and 113, 54 and 205%, respectively compared to those of the uninoculated control during 23 days. The root length of tomato plant increased by 220 and 70% by strains E and SW5, respectively. After the microcosm test, the whole tomato plant was harvested and the endogenous IAA was quantified by HPLC. The concentrations of endogenous IAA in the tomato plants treated with strains E, JJ3 and SW5 increased by 46, 79 and 14%, respectively compared to the uninoculated control, and this result supports the stimulation of tomato growth by application of these rhizobacterial isolates.
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