Medicinal Plants
Masoomeh Amerian; Mahmud Khoramivafa; Amir Palangi; Golamreza Gohari; Georgia Ntatsi
Abstract
Purpose: This research has investigated the effect of different levels of nitrogen and selenium on some growth and physiological characteristics of garlic leaves. Research method: This research was done as a factorial in the form of randomized complete blocks in 3 replications. The first factor included ...
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Purpose: This research has investigated the effect of different levels of nitrogen and selenium on some growth and physiological characteristics of garlic leaves. Research method: This research was done as a factorial in the form of randomized complete blocks in 3 replications. The first factor included four levels of nitrogen (0, 50, 100, and 150 kg ha-1) and the second factor included three levels of selenium (0, 5, and 10 mgL-1). Findings: In all four nitrogen levels, with increasing selenium concentration, plant height (69.66 cm), fresh weight (10.66 g m2), and dry weight (51.33 g m2) of leaf increased. The highest amount of photosynthetic pigments was observed in the treatment of 150 kg ha-1 of nitrogen along with 10 mg L-1 of sodium selenate. Nitrogen and selenium increased antioxidant capacity (45.69 μmol g-1FW), total phenol (295.60 mg 100 g-1FW) and ascorbic acid (18.30 mg 100 g-1FW). Contrary to selenium, nitrogen increased the amount of allicin in garlic leaf, and the highest amount of allicin (0.33 mgmL-1) was in the treatment of 150 kg ha-1 of nitrogen along with 0 mgL-1 of sodium selenate. The maximum plant height and wet and dry weight of the leaf were observed in the treatments of selenium and nitrogen, which shows the positive effect of both elements on increasing the amount of chlorophyll synthesis and, as a result increasing the amount of photosynthesis and carbon fixation, which ultimately will have, increasing the growth rate of garlic plant. Research limitations: None were found to report. Originality/Value: As a result, the treatment of 150 kg ha-1 of nitrogen along with 10 mgL-1 of sodium selenate is recommended to increase the antioxidant compounds of garlic leaf, which is a good source of these compounds and selenium in early spring, which also plays an essential role in human health.
Plant Nutrition
Farid Moradinezhad; Mina Mohammadian Moghaddam; Mehdi Khayyat
Abstract
Purpose: The effect of foliar application of gibberellic acid and boric acid on bioactive compounds and quality of pomegranate fruit cv. Shishe-Kab was investigated. Research Method: This was accomplished through the field and laboratory experiments at the Faculty of Agriculture, University of Birjand, ...
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Purpose: The effect of foliar application of gibberellic acid and boric acid on bioactive compounds and quality of pomegranate fruit cv. Shishe-Kab was investigated. Research Method: This was accomplished through the field and laboratory experiments at the Faculty of Agriculture, University of Birjand, Iran, during 2017 and 2018 seasons. Gibberellic acid (50 and 150 mg L-1) and Boric acid (200 and 600 mg L-1) were applied three times at one-month interval; late in May, June, and July during growth and developmental stages of fruits. The experiment was set in a completely randomized block design. Fruits were harvested at full maturity stage late in October, and physicochemical properties were evaluated. Findings: Results showed that anthocyanin content and antioxidant activity significantly decreased while fruit firmness, ascorbic acid content, and fruit cracking increased in gibberellic acid treatments. Application of 50 mg L-1 gibberellic acid significantly increased total soluble solids content and maturity index, but decreased titratable acidity in the fruits.However, foliar application of gibberellic acid and boric acid did not have significant effects on the pH and phenolic compounds of the fruit. Research limitations: Inability to examine different pomegranate cultivars in the investigation was a limitation. Originality/Value: Pre-harvest foliar use of gibberellic acid and boric acid showed positive and negative effects on postharvest quality attributes of Shishe-Kab pomegranate. Thus, further studies need for practical application.
