Volume 14, Issue 68 (vol. 14, no. 68 2025)
2025, 14(68): 155-170 |
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Ghorbanalizadeh Saadatabad F, Hemmati K, Zarei H, Pirdashti H, Dehestani A. The effect of ultraviolet light and melatonin on some morphophysiological and enzymatic characteristics of Dendrobium nobile Lindl.. Plant Process and Function 2025; 14 (68) : 10
URL: http://jispp.iut.ac.ir/article-1-2169-en.html
URL: http://jispp.iut.ac.ir/article-1-2169-en.html
Fatemeh Ghorbanalizadeh Saadatabad1 
, Khodayar Hemmati *2 , Hossein Zarei1 , Hematollah Pirdashti3 , Ali Dehestani4
, Khodayar Hemmati *2 , Hossein Zarei1 , Hematollah Pirdashti3 , Ali Dehestani4
1- Faculty of Plant Production, Gorgan University of Agriculture and Natural Resources, Gorgan, Iran
2- Faculty of Plant Production, Gorgan University of Agriculture and Natural Resources, Gorgan, Iran ,kh_hemmati@gau.ac.ir
3- Sari University of Agricultural Science and Natural Resources
4- Department of Agronomy, Genetics and Agricultural Biotechnology Institute of Tabarestan, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2- Faculty of Plant Production, Gorgan University of Agriculture and Natural Resources, Gorgan, Iran ,
3- Sari University of Agricultural Science and Natural Resources
4- Department of Agronomy, Genetics and Agricultural Biotechnology Institute of Tabarestan, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
Abstract: (89 Views)
A large part of the solar ultraviolet radiation that reaches the earth's surface consists of ultraviolet A radiation, which is in the wavelength range of 350 to 400 nm. Natural doses of ultraviolet radiation are important for morphogenesis in many plant species and can even be useful in many physiological and developmental processes of plants. Therefore, a factorial experiment in the form of a completely randomized design with four replications including ultraviolet A radiation at 3 levels (zero, 2, and 4 hours) and melatonin foliar spraying at three levels (zero, 50, and 100 μM) was designed and implemented to determine the effects of ultraviolet A radiation. Foliar application of melatonin and their interaction on some traits of Dendrobium nobile Lindl. According to the findings, plants treated with concentrations of 50 and 100 melatonin and without UV radiation had the highest (31.67 cm) plant height. In comparison, the lowest height belonged to the 4-hour ultraviolet radiation treatment without melatonin, which showed a lower height than other treatments. The highest increase in the amount of antioxidant activity (90.40%) was also obtained in the treatment of ultraviolet radiation for 2 hours + melatonin 100 μM. The activities of catalase (CAT) and superoxide dismutase (SOD) enzymes increased compared to the control treatment. The highest level of catalase enzyme activity (0.248 U.mg protein-1) was in the treatment of ultraviolet radiation for 2 hours + melatonin 50 μM. The highest level of superoxide dismutase enzyme activity (1.32 U.mg protein-1) was obtained in 4 hours of ultraviolet radiation + 100 μM melatonin. The results showed that the use of ultraviolet A radiation in greenhouse management can bring many benefits, including increasing the quantity and quality of plant growth. Along with the use of supplementary light radiation in the greenhouse, the use of physiological regulating substances such as melatonin is also effective in increasing and improving the characteristics and performance of plants. Therefore, the results of the current research recommend the use of ultraviolet a radiation and melatonin foliar spraying for the production of greenhouse horticultural products, including Dendrobium nobile orchids. Reducing the height by 16.04% with the use of ultraviolet A light is an important achievement in the field of ornamental plants because low-height plants have better marketability, are less damaged during transportation, and are also suitable for supply as potted plants.
Article number: 10
Type of Study: Research |
Subject:
Horticulture
Received: 2025/01/24 | Accepted: 2025/04/8 | Published: 2025/10/29
Received: 2025/01/24 | Accepted: 2025/04/8 | Published: 2025/10/29
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