Saloomeh Taheri; Taher Barzegar; Vali Rabiei; Hossein Rabi Angoorani
Abstract
Salinity is one of the most important environmental stresses that affect plant growth. In order to study the effect of Salicylic Acid (SA) on some physiological characteristics of basil under salinity conditions, the experiment was set out as a factorial design in the base of RCBD with three replications. ...
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Salinity is one of the most important environmental stresses that affect plant growth. In order to study the effect of Salicylic Acid (SA) on some physiological characteristics of basil under salinity conditions, the experiment was set out as a factorial design in the base of RCBD with three replications. Treatments consisted of four NaCl salinity levels (0, 50, 100, 150 mM), salicylic acid at three levels (0, 0.25, 0.5 mM) and two cultivars of basil (purple and green). Results showed that salinity significantly decreased amount of chlorophyll, carotenoid and leaf relative water content. Application of SA increased amounts of chlorophyll, carotenoid and leaf relative water content. The amount of proline, stomatal resistance and electrolyte leakage in leaves increased significantly under salinity condition and decreased with treatment of salicylic acid. The highest amount of chlorophyll b (0.617 mg/g FW-1) and the minimum electrolyte leakage (30.4 percent) was observed with application of 0.5 mM SA under of 0 mM NaCl concentration in green and purple basil cultivars, respectively. Also, the maximum content of proline (11.4 µg/g FW-1) and the lowest rate of stomatal resistance (7.8 s/cm-2) were obtained under 150 mM NaCl in purple and green basil cultivars, respectively. According to the results, application of salicylic acid can be proposed to improve plant growth under salinity conditions.
Jafar Hajilou; Mohammad Asadollahi; Shabnam Fakhimrezaei; Gholamreza Dehghan
Abstract
In order to determine the effects of Naphthalene acetic acid (NAA) on thinning intensive and fruit qualitative and anti-oxidant characteristics in two peach cultivars, an experiment was conducted in Research Station in Agriculture at the University of Tabriz in 2013 The experiment was arranged as factorial ...
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In order to determine the effects of Naphthalene acetic acid (NAA) on thinning intensive and fruit qualitative and anti-oxidant characteristics in two peach cultivars, an experiment was conducted in Research Station in Agriculture at the University of Tabriz in 2013 The experiment was arranged as factorial based on randomized complete block design in three replications in 'Anjiry maleki' and 'Kosary' cultivars. Treatments in four levels (0, 20, 40 and 60 ppm) after 14 days from full bloom when fruitlet diameter was 8-12 mm on selected branch was applied. Results showed that all treatments, caused effective thinning fruit in each two cultivars while in 'Kosary' cultivar abscission percentage was higher than 'Anjiry maleki'. All hormone concentrations were caused increasing length, diameter, vitamin C, pH, total solution soiled (TSS) in two cultivars. Amount of the fruit firmness was not significantly between control and hormone levels. For the both studied cultivars, the highest antioxidant activity belonged to NAA treatment in 40 mg/L concentration. Although, the NAA treatment in different concentrations had no significant effect on total phenol and flavonoid contents of fruit juice, it was improved fruit quality and thinning intensive in two peach cultivars.