Tarbiat Modares University Journal of Agricultural Science and Technology 1680-7073 19 2 2017 03 01 Bio-fertilizers and Systemic Acquired Resistance in Fusarium Infected Wheat 453 464 16046 EN S. K. Sabbagh Department of Biology, Campus of Science, Yazd University, Yazd, Islamic Republic of Iran. A. Poorabdollah Department of Soil Science, Faculty of Agriculture, University of Zabol, Zabol, Islamic Republic of Iran. A. Sirousmehr Department of Agronomy, Faculty of Agriculture, University of Zabol, Zabol, Islamic Republic of Iran. A. Gholamalizadeh-Ahangar Department of Soil Science, Faculty of Agriculture, University of Zabol, Zabol, Islamic Republic of Iran. Journal Article Bio-fertilizers have been introduced as an alternative to chemical fertilizers for plant growth and health. The objective of this pot culture experiment was to evaluate the effects of three Bio-fertilizers in single and mixed form containing arbuscular mycorrhizal fungus (<em>Glomus intraradices</em><em>),</em> N+V on growth, yield components, and expression of some defense response genes in wheat infected with <em>Fusarium oxysporum.</em> Real time PCR was performed to determine the gene expression levels of <em>β-1,3-glucanase</em>, <em>Oxalate Oxidase,</em> and <em>Chitinase</em> genes. The application of bio-fertilizers significantly increased all studied parameters, except spike length, in infected plants. The highest shoot dry weight was found in Nitroxin+Vermicompost (N+V) treatment and the highest plant height, grain number, 100 grain weight, and biological yield was observed in treatment Mycorrhizal+Vermicompost (M+V). The use of bio-fertilizer resulted in the highest expression level of <em>β-1,3-glucanase</em> gene .The <em>Chitinase</em> gene showed the lowest expression level in all treatments. Our results indicate that vermicompost application could influence the improvement of mycorrhizal colonization and development of external hyphae. https://jast.modares.ac.ir/article_16046_866d051deb3437d40731901ae7fd9092.pdf