Volume 14, Issue 65 (vol. 14, no. 65 2025)
2025, 14(65): 331-349 |
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Mohammadi H, Khodadadi M, Kalate Jari S, Diyanat M. Investigating the effect of humic acid and glycine betaine in modulating the negative effects of drought stress on some biochemical traits of “Minerva” onion. Plant Process and Function 2025; 14 (65) : 20
URL: http://jispp.iut.ac.ir/article-1-2077-en.html
URL: http://jispp.iut.ac.ir/article-1-2077-en.html
1- Department of Agriculture and Food Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
2- Vegetable Research Center, Hsri, Areeo, Karaj, Iran ,kodadadi@yahoo.com
2- Vegetable Research Center, Hsri, Areeo, Karaj, Iran ,
Abstract: (80 Views)
Water stress and low percentage of soil nutrients in arid climates are considered limiting factors for the growth of agricultural products. Proportionate feeding of plants is useful in reducing the negative effects of drought stress. The experiment was factorial in the form of a completely randomized design with drought stress treatment (85, 70 and 55% FC) and treatments including glycine betaine and humic acid at 6 levels (no application, 2 mM glycine betaine, 4 mM glycine betaine, 4 kg/ha of humic acid, 6 kg/ha of humic acid and 2 mM glycine betaine + 4 kg/ha of humic acid) with 3 replications. According to the results, both drought and amino acid treatments played a role in increasing soluble carbohydrates. Thus, the highest amount of soluble carbohydrates was observed in the treatment of glycine betaine 2 + humic acid 4 and in the most severe drought stress (55%) at the rate of 1.21 mg/g. The increase in the severity of drought stress led to an increase in the amounts of vitamin C and pyruvic acid. In other words, onions with less water were spicier. Both amino acids in all the concentrations used had the effect of increasing vitamin C and pyruvic acid. With the increase in the level of stress, total phenol production also increased. So that in 55% FC, total phenol of the control showed a 5% increase in production compared to the condition without stress. With the increase of drought stress, the amount of N and P in the plant decreased. Also, the lowest Ca was obtained in the control treatment and the combined application of 2 mM glycine amino acid and 4 kg/ha of humic acid. In general, both humic acid and glycine betaine treatments were effective in reducing damage caused by stress, and the simultaneous application of both substances in appropriate concentrations was effective in increasing nutrients, proline content and antioxidant activity under drought stress conditions.
Article number: 20
Type of Study: Research |
Subject:
Droughts Stress
Received: 2024/06/5 | Accepted: 2024/09/17 | Published: 2025/05/3
Received: 2024/06/5 | Accepted: 2024/09/17 | Published: 2025/05/3
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