Abbas Alizade ahmad abadi1; sarah khorasaninejad; Khodayar Hemmati
Abstract
In order to study the effects of Humic acid levels and irrigation regimes on the some morphological and biochemical characteristics of Echinacea purpurea L., a pot experiment was conducted as factorial based on randomized complete block design with three replications and four experimental units at research ...
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In order to study the effects of Humic acid levels and irrigation regimes on the some morphological and biochemical characteristics of Echinacea purpurea L., a pot experiment was conducted as factorial based on randomized complete block design with three replications and four experimental units at research farm of Gorgan University of Agricultural Sciences and Natural Resources, during growing season of 2014- 15. Treatments were four levels of irrigation regimes (40, 60, 80 and 100 percent field capacity) and humic acid including four levels: (0, 250, 500 and 1000 mg/kg). The results showed that irrigation regimes had significant effect on all measured properties except root length. Humic acid increased all of the growth caractristics and morphological traits in 5% level statistically, while had significant effect on total flavonoid and increased it. Interaction effect of humic acid and irrigation regimes was significant for wet and dry weight of root and shoot, total phenol and flavonoid. Therfore, the limited irrigation had negative effect on growth and plants increased their phenol and antioxidant components to stress coping. Humic acid increased growth and yield in plants that were faced with stress.
khodayar hemmati; majedeh malekian; azim ghasemnezhad; nastaran hemmati
Abstract
The aim of present research was to study the effect of harvesting time and fruit tissue on the content of some flavonoids of different varieties of orange. The experiment was done based on the split plot design with completely randomized design in three replications. In this research the main ...
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The aim of present research was to study the effect of harvesting time and fruit tissue on the content of some flavonoids of different varieties of orange. The experiment was done based on the split plot design with completely randomized design in three replications. In this research the main factor was texture of the fruit (epicarp, mesocarp and endocarp) and secondary factors were matured fruits of four different varieties (Thomson navel, Washington navel, Sanguine and lebani) and seven different harvesting times. Results showed that harvesting time had significant effect on all measured parameters. In which, the highest dry weight as well as total soluble solid (11.81 percent) were observed in the samples harvested in the sixth harvest time. In this stage, the highest hesperidin content (219.1 mg/ml) was observed in endocarp section. In contrast to that, the highest amount of naringin (435.3 mg/l) was observed in third stage in epicarp section without significant difference with fifth (endocarp) and sixth (mesocarp) harvest time. Among used varieties, the highest amount of both hesperidin and naringin was observed in Thomson navel fruit in sixth stage.
Majedeh Malekian; Khodayar Hemmati; Azim Ghasemnezhad; Mohammad Barzali
Abstract
German chamomile (Matricaria chamomilla) is one of the most important industrial medicinal plant. Inthis experiment the effects of foliar application of salicylic acid in different levels (0, 10-2, 10-4, 10-6) wereinvestigated on the floral traits and essential oil content of three ecotypes (Italian, ...
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German chamomile (Matricaria chamomilla) is one of the most important industrial medicinal plant. Inthis experiment the effects of foliar application of salicylic acid in different levels (0, 10-2, 10-4, 10-6) wereinvestigated on the floral traits and essential oil content of three ecotypes (Italian, Tehran, Zabol) ofGerman chamomile. The results showed that maximum percentage of essential oil (1.5 weight percent)was obtained from Zabol ecotype as sprayed with 10-4 M of salicylic acid and Maximum oil yield (0.085gr per pot) was obtained from Italy ecotype in which treated with 10-2 M salicylic acid. Among theidentified sesquiterpenes of essential oil, Chamazulene, E-β Farencene and α-Bisabolol oxide A weresignificantly varied based on the experimental treatments. The highest amount of Chamazulene (3.789percent) was recorded in Italian ecotype in which treated with 10-2 M salicylic acid, and the same ecotypeproduced highest amount of farencene (2.264 percent) when treated with 10-2 M Salicylic acid. Theapplication of salicylic acid in concentrations of 10-4 and 10-6 M increased the α-Bisabolol oxide A(respectively, 70.907 and 73.482 percent) Compare with control. Generally, contrary to essential oil yieldcomponent, only the essential oil yield and its constituent were affected by salicylic acid application andthe responses of experimental ecotypes was varied.