Document Type : Research Paper
Authors
1
M.Sc. of Plant Pathology, Vali-e-Asr University of Rafsanjan, Iran
2
Assistant professor of the Plant Pathology Vali-e-Asr University of Rafsanjan, Iran
3
Associate Professor of Agronomy, Vali-e-Asr University of Rafsanjan, Iran
4
Associate Professor of Agronomy, Vali-e-Asr University of Rafsanjan, Iran; E-mail: rahimia@vru.ac.ir Associate Professor of Agronomy, Vali-e-Asr University of Rafsanjan, Iran
5
Professor, Department of Agriculture, Payame Noor University, Tehran, Iran
Abstract
Due to the importance of mycorrhizal fungi and their ability in colonization of plants, the use of some microorganisms and chemical compounds to improve mycorrhizal activity is an important issue. In this study, an experminet was conducted as a compeletely randomized factorial desin with three replications at Valiasr University of Rafsanjan.Three fungal species, Funneliformis mosseae(FM), Rhizophagus intraradices(RI) and Rhizophagus irregalaris (RIr) were applied asmycorrhizal inoculant and the effect of some microorganisms including yeast (Issatchenkia orientalis) and bacteria (Pseudomonas fluorescens VUPf5) as well as chemical compounds such as compost tea, azolla extract, bacterial siderophore, humic acid and amino acid complex on fungal activity and physiological parameters of corn plant (SC750 cultivar) was examined. The results showed that all species of mycorrhizal fungi combined with bacterial treatment and chemical compounds had a significant effect on stem diameter and longitudinal growth, leaf area increase, root weight and dry weight and shoot dry weight. Variance analysis of SPAD showed that there was not significant difference between mycorrhizal and non-mycorrhizal treatments. However, the application of different species of mycorrhizal fungi had a significant effect on the content of chlorophyll a, chlorophyll b, total chlorophyll and carotenoids in compared to the control (without mycorrhizal fungus) treatment. The use of humic acid and compost had the extreme effect on plant growth. Amino acid complex treatment with Rhizophagus intraradices had the greatest effect on chlorophyll a, chlorophyll b and total chlorophyll content. The treatments of yeast and amino acid complex had the greatest effect on carotenoids, respectively..
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