- Selcuk Journal of Agriculture and Food Sciences
- Vol: 22 Issue: 45
- Morphological Properties of The Azospirillum Strains Isolated from Tokat Region’s Soils
Morphological Properties of The Azospirillum Strains Isolated from Tokat Region’s Soils
Authors : Mehmet Öğüt, Fatih Er, Necdet Kandemir
Pages : 66-73
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Publication Date : 2008-08-25
Article Type : Research Article
Abstract :Azospirillum strains enhance the plant growth by means of nitrogen (N2) fixation and production of phytohormones. There is almost no work in the isolation of Azospirillum strain in TURKEY. Twenty-one soil samples along a highway with 5 km intervals in Northern Turkey were collected for this reason. A total of 346 putative Azospirillum strains were isolated from the rhizospheric soil and surface sterilized roots of the wheat and maize grown in pots containing these soils. On an average, the number of isolates obtained from wheat-rhizosphere (2.69) was statistically (P<0.05) higher than the number of strains isolated from wheat-roots (2.28). Similarly, in terms of both rhizosphere and root, there was more strains in the wheat than maize. The percent Gram Negative strains was 73.5%, the Gram Positive 24%, and Gram Variable 2.5%. The percent spiral isolates was 55%, rod 9%, cocci 7%, and vibroid 29%. The percent pleomorphic cells were 37%. The percent of the non-motile strains was 14%, the percent of the strains with low-motility 43%, and the percent of the strains with high motility 43%. Approximately 35% of the strains isolated could use glucose as the sole source of carbon. According to our study, the genus Azospirillum, has a great distribution in Tokat soils, regardless of the management system, climate and vegetation.Keywords : İzolat, morfolojik özellikler, Tokat, Azospirillum