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Articles by K. Khavazi
Total Records ( 2 ) for K. Khavazi
  M.H. Arzanesh , H.A. Alikhani , K. Khavazi , H.A. Rahimian and M. Miransari
  This research was conducted to determine: (1) the effects of drought on wheat seedlings growth underi in vitro and dark conditions and (2) if inoculation of wheat seedlings with Azospirillum sp. can alleviate the unfavorable effects of drought on the growth of wheat seedlings. In vitro planted seedlings were subjected to different drought intensities using poly ethylene glycol and were inoculated with 25 Azospirillum strains including the isolated ones and the standard strains of A. halopreaferanse, A. brasilense, A. irakense and A. lipoferum. Different strains of Azospirillum sp. enhanced seedlings growth and adjusted their water behavior under drought. Such results in combination with the previously related results indicate that Azospirillum sp. are able to enhance plant growth and production under different physiological and ecological conditions.
  Y. Javadi Esfehani , K. Khavazi and S. Ghorbani
  To study the cross interaction of microorganisms in plant growth promotion and the effect of auxin in this interaction, Pseudomonas putida and Glomus intraradices were co-inoculated on wheat. For this purpose, a mutant that produced less amount of auxin was derived from the bacterial strain by chemical mutagenesis with ethyl methane sulfonate. Next both the wild-type strain and the mutant strain were labeled with gusA for a better detection on the roots. Finally, the bacteria were inoculated on wheat as single inoculants or combined with arbuscular mycorrhizal fungi. Controls included non-bacteria/non-arbuscular mycorrhizal fungi and arbuscular mycorrhizal fungi alone. Plants co-inoculated with the wild-type bacterial strain and Glomus intraradices had the highest stem and their fresh and dry shoot weight was more than other treatments. Also, it was observed that the wild-type strain significantly improved the mycorrhizal colonization which implies the beneficial effect of auxin on mycorrhizal colonization. Furthermore, Glomus intraradices increased the population density of the wild-type strain in the endorhizosphere. In the microscopic studies of plant roots, bacterial colonies were observed as blues lines on the surface and inside the roots as well as on the seed surfaces.
 
 
 
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