Plant Growth Promoting Characteristics in Some Flavobacterium spp. Isolated from Soils of Iran
By A. Soltani, Kazem Khavazi, H. Asadi-rahmani, M. Omidvari, P. A. Dahaji, Hamed Mirhoseyni. 2010
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Plant growth promoting rhizobacteria (PGPR) is referred to a heterogeneous group of beneficial rhizosphere bacteria that could enhance plant yield through one or more mechanisms. Flavobacterium has been noted as PGPR in almost all review articles. However, there are a few studies regarding plant growth promotion imposed by them. Some of Plant growth promoting characteristics such as Phosphate solubilizing capacity, ability to use of 1-Amino Cyclopropan-1-Carboxylate (ACC) as sole nitrogen source and production of auxin, siderophore, salicylic acid, chitinase and hydrogen cyanide were evaluated in forty-four flavobacteria isolated from rhizosphere of wheat. Results showed that none of the isolates were able to produce siderophore, salicylic acid and chitinase and they were not able to use ACC as well. Determining the siderophore showed that none isolates did not grow on Chrome Azurol S (CAS) Agar medium. The results of this part were further analyzed using CAS Agar Diffusion (CASAD) method, but the results were also negative. HCN production was observed in all isolates, but in lowest limit. Thirty-four isolates were capable to solubilize insoluble inorganic Phosphate (P) sources. The average rate of P-solubilization was 3.54 µg Pml -1 , ranging from zero to 37.48 µgPml -1 . There was a significant negative correlation (r = -0.81**) between solubilized P and the final pH of the growth medium. In this study, all the isolates were able to produce auxin, ranging from 0.27 to 12.03 µgml -1 averaged by 2.03. Considering the ability of the isolates to produce auxin and for P-solubilization, it is necessary to evaluate their effect on growth and yield of different crop plants.
Subfields: Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/397890af0a88dc492fb4314c6e495981c93c1f53
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Citations in the corpus
- Rhizosphere: its structure, bacterial diversity and significance (2014, background): “…Arthrobacter, Flavobacterium, Burkholderia, Bradyrhizobium, Mesorhizobium, Rhodococcus and Serratia, etc. (Berg 2000; Berg et al. 2002; Sobral et al. 2004; Sessitsch et al. 2005; Chen et al. 2006; Fischer et al. 2006; Fernandez et al. 2007; Naik et al. 2008; Ahmad et al. 2008; Soltani et al. 2010).”