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Multigeneric co-aggregation in Azospirillum brasilense AZP18 with other PGPR strains and its inoculation effect on the growth and yield of sunflower (Helianthus annuus ‘Sunbeam’)

논문 기본 정보

저자정보
(충북대학교) (Annamalai University) (충북대학교)
저널정보
한국토양비료학회 한국토양비료학회 학술발표회 초록집 2011 춘계학술발표회 논문 초록집
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78 - 89 (12page)
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Multigeneric co-aggregation in Azospirillum brasilense AZP18 with other PGPR strains and its inoculation effect on the growth and yield of sunflower (Helianthus annuus ‘Sunbeam’)
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    초록·키워드

    Co-aggregation is the result of cell-to-cell recognition between distinct cell types. Macroscopically, this phenomenon can be detected as clumping when different types of bacterial cells are mixed and may be intrageneric, intergeneric or multigeneric in nature. Co-aggregation was studied multi-generically in Azospirillum brasilense AZP18 with other plant growth promoting rhizobacterial (PGPR) strains such as Azotobacter chroococcum MTCC446, Azorhizobium caulinodans ORS571, Bacillus megaterium MTCC3353 and Pseudomonas fluorescens MTCC4828. Among the different combinations tried co-aggregation was found to high among Azospirillum AZP18 and Azotobacter MTCC446 strains. Co-aggregation was found to be high at an inoculation level of 107 CFU/㎖ and in stationary phase. Treatment with urea, protease, EDTA (ethylene diamine, tetra acetic acid and heat treatments were found to inhibit co-aggregation. On the other hand sonication treatment was found to increase co-aggregation. Vermiculite sustained the highest survival population after 30 days of incubation at 30 ± 2℃. Inoculation studies showed that the combination of Azospirillum AZP18 and Azotobacter MTCC446 favoured a higher growth and yield in sunflower crop under pot culture conditions.

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      UCI(KEPA) : I410-ECN-0101-2014-521-000745881