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Investigation the possibility of reducing ultraviolet tension in plat sweet corn (Zea mays var. Saccharata)
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Kobra Mahdavian *   |
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Abstract: (1882 Views) |
| Ultraviolet is divided into three strips with UV-A (320-390nm), UV-B (280-320nm) and UV-C (254-280nm) wavelengths and has adverse effects on the growth of a number of plants. Meanwhile, salicylic acids are a group of plant growth regulators that have unique biological effects on plants growth and development. Therefore, the aim of the present research was to investigate the application of salicylic acid to reduce the ultraviolet radiation tension of corn on germination, growth of shoot and root, fresh and dry weight, the amount of reducing sugars, malondialdehyde and other aldehydes. Maize plants treated with 1.5 milli Molar salicylic acid were then treated for a period of one week with UV-A, UV-B, UV-C in a completely randomized design. This investigation showed that salicylic acid significantly increased germination of maize at 5 percent probability level. The results of these researches showed that UV-B and UV-C significantly reduced the growth of shoot, root, fresh and dry weight, whereas in the pre-treated plants with salicylic acid this decrease was significantly moderated to the five percent probability level. It was also observed that UV-A had no significant effect on growth of shoot, root, fresh and dry weight. The amount of malondialdehyde and other aldehydes in plants treated with UV-B and UV-C significantly increased at a probability level of 1 percent, indicating the tension caused by UV-B and UV-C rays on the plant and the activation of defense mechanisms in these conditions. Significant decrease in the amount of leaf reductive sugars at 1 percent probability indicates radiation damage on photosynthetic apparatus. On the other hand, a significant increase in the amount of reducing sugars at the 1 percent probability level indicates the role of salicylic acid in increasing the resistance of this plant to UV-B and UV-C radiation. Considering the above, it can be concluded that the application of salicylic acid protects the plant against ultraviolet radiation. |
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| Keywords: Salicylic acid, Reducing sugars and Malondialdehyde. |
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Full-Text [PDF 1118 kb]
(1980 Downloads)
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Type of Study: Applicable |
Subject:
Crop Physiology
Received: 2020/01/1 | Accepted: 2020/01/1 | Published: 2020/01/1
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