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.
Leila Mohammadi; Saeed Rizi; Rahim Barzegar
Abstract
To evaluate the effect of arbuscular mycorrhiza (Glomus mosseae) under salt stress on physiological and some nutrient absorption in New Guinea Impatiens (Impatiens hawkeri), an experiment established in complete random design with three replications (three pots for each replication) in greenhouse in ...
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To evaluate the effect of arbuscular mycorrhiza (Glomus mosseae) under salt stress on physiological and some nutrient absorption in New Guinea Impatiens (Impatiens hawkeri), an experiment established in complete random design with three replications (three pots for each replication) in greenhouse in Shahrekord University in 2014. Treatments were inoculation of substrate with three levels of arbuscular mycorrhiza (0, 8 and 16 percent, v/v) and sodium chloride (0, 15 and 30 Mm). The substrate medium was included 50 percecnt of peat moss, 40 percent of perlite and 10 percent of rice husk (v/v). The mycorrhizal inoculation done with transplanting and salt stress treatment was applied with irrigation water after stablishment of transplants. Some traits such as nitrogen, phosphorous, potassium, sodium and proline content, dry and fresh root weight and root colonization percentage were evaluated. The results showed that 16 percent of mycorrhiza treatment had significant effect on nitrogen (2.31 percent) and phosphorous (0.339 percent) and it’s interaction with 30 Mm of salt stress had significant effect on proline content (0.754 micromol/gfw) and root colonization (35 percent) percentage. Based on this research the difference between mycorrhiza treated plants and other treatments was significant and it seems that the application of mycorrhiza in medium, can increase salt tolerance in New Guinea Impatiens by effect on some physiological traits.