Parvin Talebi; Zohreh Jabbarzadeh; Mir Hassan Rasouli Sadaghiani
Abstract
This research was conducted to study the effects of soil and foliar applications of humic acid on the growth and flowering characteristics and nutrient uptake of Rosa chinensis var. minima ‘Baby Masquerade’ as a factorial experiment based on completely randomized design with two factors: ...
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This research was conducted to study the effects of soil and foliar applications of humic acid on the growth and flowering characteristics and nutrient uptake of Rosa chinensis var. minima ‘Baby Masquerade’ as a factorial experiment based on completely randomized design with two factors: four concentrations of humic acid (0, 500, 1000 and 2000 mg.l-1) and two application methods (drench and spray) with three replications and two observations in the research greenhouse of Urmia University in 2014-2015. The results indicated a significant effect of humic acid on the growth traits (such as fresh and dry weight of leaf and stem diameter), flowering characteristics (such as the number and diameter of buds and flower diameter) and nutrient uptake of Rosa chinensis var. minima ‘Baby Masquerade’. The results showed that soil application of 2000 mg l-1 humic acid caused to high absorption of nitrogen (8.425 µg/per pot) and iron (8.12476 µg/per pot) in the plant, but the absorption of Zn was not affected by the concentrations of humic acid. High Cu absorption was observed in 1000 mg l-1humic acid (46.342 µg/ pots). The absorption of Mn and K was high in 1000 mg l-1 HA. As a result, application of humic acid in plants caused to enhance some essential elements absorption and plants growth.
mehdi nazarian; Mohammad Javad Arvin; shima hasanzadehfard
Abstract
To investigate the effects of methyl jasmonate growth regulators on growth characteristics, fruit number and fruit yield of ‘Semsuri’ melon, an experiment at the field of Shahid Bahonar University was conducted in summer 2012. Melon (cv. ‘Semsuri’) is widely cultivated in Iran ...
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To investigate the effects of methyl jasmonate growth regulators on growth characteristics, fruit number and fruit yield of ‘Semsuri’ melon, an experiment at the field of Shahid Bahonar University was conducted in summer 2012. Melon (cv. ‘Semsuri’) is widely cultivated in Iran and therefore increasing the fruit yield and quality of this cultivar is necessary. Some growth regulators including Methyl Jasmonate (MJ) may improve growth and development of plants when applied at appropriate low concentrations. Thus, a complete random block experiment at the research field of Shahid Bahonar University was conducted to study the impact of 0, 2.5 and 5µM of MJ applied as seed soaking, foliar spray at 6-7 leaf stages, after fruit set and in combination with treatments on growth and fruit yield of ‘Semsuri’ melon. To promote growth and fruit yield, two times application of MJ is required. MJ reduced leaf ion leakage and increased chlorophyll index, relative water content, flesh thickness, plant fresh weight and fruit yield. Moreover, MJ significantly reduced fruit set that reduces fruit hand thinning. Most effective level of MJ was 5 µM applied at 3 stages. Compared with control, 5µM MJ reduced leaf ion leakage (42 percent), and increased chlorophyll index (45 percent), relative water content (32 percent), flesh thickness (33 percent), plant fresh weight (38 percent), root fresh weight (40 percent) and fruit yield (24 percent with two melons per plant and 19 percent with three fruits per plant).
Asghar Ramezanian; Seyyed Hossein Mirdehghan; Najmeh Roshanzamir
Abstract
In this research the effect of preharvest application of salicylic acid and methyl jasmonate on vase life and some qualitative and quantitative characteristics of cut rose flowers cvs. ‘Sweet Water’ and ‘Dolsevita’ was investigated. Salicylic acid at 0.01, 0.05 and 0.1 mM and ...
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In this research the effect of preharvest application of salicylic acid and methyl jasmonate on vase life and some qualitative and quantitative characteristics of cut rose flowers cvs. ‘Sweet Water’ and ‘Dolsevita’ was investigated. Salicylic acid at 0.01, 0.05 and 0.1 mM and methyl jasmonate at 0.1 and 0.2 mM foliar sprayed and distilled water used as control. This experiment was carried out using CRD with four replications. Harvested flowers kept at 3±1°C and 70-80% RH. Results showed that methyl jasmonate at 0.2 and salicylic acid at 0.1 mM on ‘Sweet Water’ and methyl jasmonate at 0.1 mM on ‘Dolsevita’ increased vase life with delay in senescence related processes through increase in solution uptake, increase in relative fresh weight, maintenance of plant membrane stability and stem total carbohydrate. Also, ‘Sweet Water’ with average of 40.56 days compared with ‘Dolsevita’ with average of 27.74 days increased the vase life. Overall, preharvest spray of roses with methyl jasmonate and salicylic acid as a method to increase postharvest quality and maintenance of cut roses is recommendable.