Somayeh Ehsanfar; Ali Sorooshzadeh; Seyed Ali Mohammad Modarres-Sanavy; Majid Ghorbani Javid
Abstract
To investigate the effect of polyamines on vegetative and biochemical traits of Crocus sativus L., an experiment was conducted as factorial in a randomized complete block design with three replications in 2015-2016 in Training Field of Tarbiat Modares University with three sizes of corms (3-5, 5-7 and ...
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To investigate the effect of polyamines on vegetative and biochemical traits of Crocus sativus L., an experiment was conducted as factorial in a randomized complete block design with three replications in 2015-2016 in Training Field of Tarbiat Modares University with three sizes of corms (3-5, 5-7 and 7-10 g) and five concentrations of polyamines (zero in control, zero in distilled water, spermidine 0.5 and 1 , putrescine 0.5 and 1 ) as the treatments. Results showed that plants treated with putrescine 0.5 and spermidine 1 mM had the highest germination percentage (96.56 percent) and the highest number of lateral sprouts (average number of 8.33), respectively. The length and weight of the leaves were negatively affected by polyamine treatment. The highest chlorophyll content and corm yield were observed in plants treated with Putrescine 0.5 mM and 1 mM, respectively. The content of starch and soluble carbohydrates in dormant corms at the end of growing season were not affected by polyamines significantly; however, total phenolic and flavonoid content in these corms were respectively decreased and increased as a result of applying polyamines. Having no significant effect on stigma dry weight and picrocrocin content, polyamine treatment increased the number of flowers and crocin content in small corms. It is concluded that to obtain better vegetative and biochemical traits of saffron, corms more than 7 g, treated with putrescine, should be used.
Saeideh Maleki Farahani; Mahdi Aghighi Shahverdi
Abstract
To evaluate the effect of nano-iron chelate and also to make a comparison with effect of EDDHA iron chelate on saffron, an experiment was conducted as factorial based on a randomized complete block design with six treatments and three replications in Shahed University, Tehran in 2011 and 2012. Treatments ...
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To evaluate the effect of nano-iron chelate and also to make a comparison with effect of EDDHA iron chelate on saffron, an experiment was conducted as factorial based on a randomized complete block design with six treatments and three replications in Shahed University, Tehran in 2011 and 2012. Treatments included iron fertilizer (Nano chelate and common chelate) in three levels (zero, 450 and 900 g/hairon). The results showed that all traits except carotenoid, chlorophyll a concentration and leaf width affected by type and amount of iron fertilizer or their interaction. Saffron yield increased by both iron sources (about 50 percent). Application of 10 kg/ha of nano-iron chelate fertilizer, increased dry stigma yield, fresh flower weight, flower number, leaf number, main corm diameter and total corm weight of saffron compared to control though they were in some cases two times compared to control. Totally, results indicated more effectiveness of nano-iron at five kg/ha nano iron chelate fertilizer and 10 kg/ha common iron chelate fertilizer had the same effects on most of the traits. It seems that soil Fe deficiency and nano chelate efficacy in slow releasing may lead to saffron yield increment.