Vahid Akbarpour; Mahboobeh Ashnavar; Mohammad Ali Bahmanyar
Abstract
Plant secondary materials play an important role in health and human nutrition. According to the importance of coneflower in the production of secondary materials and also the effect of nutrient on the amount of secondary materials, a pot experiment was conducted with a completely randomized design six ...
Read More
Plant secondary materials play an important role in health and human nutrition. According to the importance of coneflower in the production of secondary materials and also the effect of nutrient on the amount of secondary materials, a pot experiment was conducted with a completely randomized design six treatments and three replications in Sari University of Agricultural Sciences and Natural Resources in 2015. Treatments were included: chemical fertilizer (150 kg N, 120 kg P2O5 and 250 kg K2O per hectare from urea, triple super phosphate and potassium sulphate source, respectively) (CF), 30 t.ha-1 manure (M), 15 t.ha-1 M+25 percent CF, 15 t.ha-1 M+50 percent CF and 15 t.ha-1 M+75 percent CF and control (without applying chemical fertilizer and compost). Result indicated that all traits such as chlorophyll a and b, yield of anthocyanin and flavonoid in leaf and root, yield of total phenolic in flower and percentage of antioxidant activity in full bloom were affected by different fertilizer treatments. So that the maximum concentration of chlorophyll a and b (11.33 and 2.41 mg.gr-1 FW respectively) were related to the application of chemical fertilizer that with incorporation manure and chemical fertilizer (15 t.ha-1 M + 25 percent CF and 15 t.ha-1 M+75 percent CF) were statistically the same level. Meanwhile, the application of 30 t.ha-1 M had the greatest effect on anthocyanin and flavonoid in leaves and total phenolic of flower. Maximum antioxidant activity was obtained with using 15 t.ha-1 M+25 percent CF increased 10 percent and 80 percent compared to the control and CF treatments, respectively.
Ghasem Sartip; Jafar Hajilou
Abstract
To determine the effects of pre-harvest salicylic acid (SA) treatments on postharvest life and quality of apricot fruits, four different concentrations (one, 1.5, three and 4.5 mM) were applied six days before harvesting of apricot fruits cv. ‘Shamlou’. Fruits harvested at commercial maturity ...
Read More
To determine the effects of pre-harvest salicylic acid (SA) treatments on postharvest life and quality of apricot fruits, four different concentrations (one, 1.5, three and 4.5 mM) were applied six days before harvesting of apricot fruits cv. ‘Shamlou’. Fruits harvested at commercial maturity stage and stored at 2ºC with 90 percent RH on the same day for a period of three weeks. The fruit was evaluated for weight loss, flesh firmness, total soluble solid (TSS) contents, titratable acidity (TA), ascorbic acid contents, total phenolic contents and total flavonoids in treated and nontreated fruits. Results showed that salicylic acid treatments significantly exhibited weight loss and flesh firmness compared with control. At the end of storage, the highest ascorbic acid content and total phenolic content was observed in 4.5 mM SA treated fruits. The highest flesh firmness, titratable acidity and flavonoids were observed at three mM SA treated fruits and at the end stage of storage. The lowest weight loss, TSS and pH were recorded at 3mM SA treated fruits.