hamzeh mirzaie; Farid Shekari; reza fotovat; mohammad amir delavar
Abstract
Investigating the effect of various sources of sulfurous compounds along with the inoculation of Thiobacillus bacteria on corn plants under stress conditions of lead and zinc metals, Factorial experiment of randomized complete blocks design was carried out in the Agricultural Research Greenhouse of Zanjan ...
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Investigating the effect of various sources of sulfurous compounds along with the inoculation of Thiobacillus bacteria on corn plants under stress conditions of lead and zinc metals, Factorial experiment of randomized complete blocks design was carried out in the Agricultural Research Greenhouse of Zanjan University in 2021. The treatments include elemental sulfur (0.75, 1.25 and 2 g/kg soil), sulfur with thiobacillus bacteria(biosulfur) (1, 2 and 3 g/kg soil) and potassium sulfate (0.5, 1 and 1.5 g/kg soil). The results showed traits were significant in the vegetative growth stage in all applied treatments. The treatments increased the amount of chlorophyll, enzymes compared to the control. Then decreased the leaf temperature, Increasing the length of leaf cells. also, it increases the leaf area and leaf production rate in plants. This increase was higher in sulfur treatment with bacteria. But the treatments of 2 grams of elemental sulfur and 1.5 grams of potassium sulfate caused stress in the plant and reduced the amount of traits compared to the control. Also, the plants in contaminated soil were stressed and the amount of the mentioned traits also decreased. However, with the application of treatments, the amount of carotenoid, total protein and peroxidase traits increased, which reduced the stress in plants and increased the amount of traits and growth indicators compared to control in contaminated soil. Sulfur treatment with bacteria, compared to other applied treatments, by activating the enzymatic and non-enzymatic defense system of the plant, causes the plant to tolerate stress and improve plant growth.
Khodabakhsh Goodarzvand Chegini; Reza Fotovat; Mohammad Reza Bihamta
Abstract
In order to evaluate the effect of drought stress on morphological, physiological and agronomical charactristice of tolerant, semi-tolerante and sensitive chickpea genotypes, a greenhouse exprimemt was conducted as factorial based on completely randomized design with three replications. The first factors ...
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In order to evaluate the effect of drought stress on morphological, physiological and agronomical charactristice of tolerant, semi-tolerante and sensitive chickpea genotypes, a greenhouse exprimemt was conducted as factorial based on completely randomized design with three replications. The first factors included of no water deficit stress, mild stress and sever stress and second factor included of 11 genotypes. Analysis of variances results indicated significant effect of genotype factor between all the traits exept relative water content and all intractions of genotype irrigation were significant except root dry weight, shoot dry weight, root diameter, shoot length and primary branch numbers. The greatest percentage of trait changes belonged to shoot dry weight, shoot fresh weight and biological yields in high drought stress and the lowest percentage of trait changes belonged to rate of water lost. The tolerant genotype of Fars shahpoor-3659 with low canopy temperature had the highest root fresh weight, shoot fresh weight and shoot length under non stress conditions and the sensitive genotype of Fars shahpoor-3723 with high canopy temperature had low biomass yields, root fresh weight, shoot fresh weight and shoot dry weight which showed reduction of root diameter, primary branch numbers and relative water content under high stress, too. Thus, these two genptypes could be used as indexes for identification of tolerant and sensitive varirties in later experimets.