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Paper Information

Journal:   PLANT ECOPHYSIOLOGY (ARSANJAN BRANCH)   winter 2018 , Volume 9 , Number 31 ; Page(s) 0 To 0.

The effect of mycorrhiza and methanol foliar application on yield and yield components of wheat cultivars under water deficit stress conditions

* Department of Agronomy and Plant Breeding, Tabriz Azad University Tabriz, Iran
A factorial experiment with split plot arrangement using the randomized complete blocks design with three replications was carried out in Khorramabad in the two crop years of 2012-2013 and 2013-2014. Water deficit stress in the main plots at the end of the growing season at three levels (desirable irrigation, mild stress, and severe stress equivalent to 40, 60, and 80% depletion of soil moisture available to plants, respectively) was one of the studied factors. Mycorrhiza biofertilizer and methanol sprays at four levels (no inoculation + distilled water spray, inoculation with mycorrhizal fungi + distilled water spray, no inoculation with mycorrhizal fungi + methanol spray, and inoculation with mycorrhizal fungi + methanol spray) was another studied factor, and so was the cultivar factor (the three irrigated wheat cultivars of Aflak, Dena, and Alvand). Results indicated water deficit stress reduced 1000-seed weight, number of grains per spike, grain yield, biological yield, and harvest index. Inoculation with mycorrhizal fungi and methanol sprays under mild and severe water stress conditions decreased and modified the negative effects of water stress. The cultivars responded differently to water deficit stress: mild and severe water deficit stress reduced yield of the Alvand cultivar more than they did those of the Aflak and Dena cultivars. Under conditions of severe water stress, the durum cultivar Dena had a higher yield compared to the other two cultivars. Results of this research indicate inoculation with mycorrhizal fungi and foliar application of methanol can be considered and utilized for compensating the loss resulting from water stress at the end of the growing season in irrigated wheat.
Keyword(s): Severe stress,harvest index,biofertilizer
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