頁籤選單縮合
題 名 | Co-aggregation in Azospirillum Brasilensense MTCC-125 with Other PGPR Strains: Effect of Physical and Chemical Factors and Stress Endurance Ability |
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作 者 | Joe, Manoharan Melvin; Jaleel, Cheruth Abdul; Sivakumar, Palanivel Karpagavinayaka; Zhao, Chang-xing; Karthikeyan, Balathandayutham; | 書刊名 | Journal of the Taiwan Institute of Chemical Engineers |
卷 期 | 40:5 2009.09[民98.09] |
頁 次 | 頁491-499 |
分類號 | 430.1635 |
關鍵詞 | Azospirillum brasilense; Plant growth promoting rhizobacteria; PGPR; Co-aggregation; Survival; Tolerance; |
語 文 | 英文(English) |
英文摘要 | Abstract This work aims at exploring the co-aggregation of Azospirillum brasilense MTCC-125 with other plant growth promoting rhizobacterial (PGPR) strains. The PGPR strains include Azotobacter chroococcum MTCC-446, Azorhizobium caulinodans ORS-571, Bacillus megatherium MTCC-3353 and Pseudomonas fluorescens MTCC-4828. The influence of different physical and chemical factors involved in this phenomenon was investigated. Co-aggregation was found to be dependent on various factors: pH, temperature, inoculation level and growth phase. Treatment with urea, protease and chelating agents such as EDTA (ethylene diamine, tetra acetic acid) and EGTA (ethyl glycol-bis(β-amino ethyl ether) N-N′-tetra acetic acid) was found to inhibit co-aggregation. Sonication was found to increase co-aggregation, while heat treatment has a detrimental effect. The ability of Azospirillum co-aggregates to endure desiccation, heat, osmotic tolerance and osmotic shock and for its survivability in different carrier materials were also evaluated. Among the different combinations, the co-inoculation of Azospirillum MTCC-125 and Azotobacter MTCC-446 exhibited a higher degree of tolerance as compared to the other combinations tested. |
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