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Effect of Foliar Application of Salicylic Acid on Biochemical and Physiological Characteristics of Maize Genotypes under Saline Tension Conditions
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Davar Molazem *   , Ali Bashirzadeh , Jafar Azimi |
| Department of Agronomy and Plant Breeding, Astara Branch, Islamic Azad University, Astara, Iran. |
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Abstract: (811 Views) |
To investigate the effect of foliar application of salicylic acid concentrations (zero, one and two milli Molar) on biochemical and physiological characteristics of three maize genotypes SC704, NS640 and SC580 in salinity tension (zero, 50 and 100 milli Molar NaCl) a pot experiment was carried out by factorial split plot in randomized complete blocks design with three replications at the research station of Islamic Azad University, Ardabil Branch in 2014-2015 cropping year. The results showed that most traits had significant differences in different salinity and salicylic acid levels. Comparison of means showed that salinity tension increased proline, superoxide dismutase, malondialdehyde, sodium content and electrolyte leakage to 70.49, 145, 58.99, 92.86 and 12.6 percent, respectively, while carotenoids, membrane stability index and potassium decreased by 36.41, 20.32 and 39.68 percent, respectively. Foliar application of salicylic acid increased superoxide dismutase enzyme by 24 percent compared to the control, but there was no significant difference between one or two milli Molar. NS64 variety showed the highest superoxide dismutase enzyme. Maize genotypes under salinity tension had higher malondialdehyde content; however, the lowest amount of malondialdehyde (6,538 mol units per gram of wet weight) was observed in non-saline conditions and the highest level of salicylic acid. Foliar application of salicylic acid moderated the negative effect of salinity tension on the traits and increased carotenoids, potassium and membrane stability-index and decreased malondialdehyde content and electrolyte leakage. SC704 genotype with the highest amount of proline, malondialdehyde and potassium showed the highest index of membrane stability.
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| Keywords: Salinity, Superoxide dismutase, Maize and Malondialdehyde. |
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Full-Text [PDF 783 kb]
(1437 Downloads)
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Type of Study: Applicable |
Subject:
Crop Physiology
Received: 2022/01/5 | Accepted: 2021/12/31 | Published: 2021/12/31
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