Volume 11, Issue 48 (vol. 11, no. 48 2022)
2022, 11(48): 249-262 |
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Salehi-Eskandari B, Nasirian Jazi Z, Abbaspour J, Daneshmand F. Some growth and biochemical changes of viola (Viola × wittrockiana) and Snapdragon (Antirrhinum majus) ornamental plants to freezing stress. Plant Process and Function 2022; 11 (48) : 16
URL: http://jispp.iut.ac.ir/article-1-1643-en.html
URL: http://jispp.iut.ac.ir/article-1-1643-en.html
1- Department of Biology, Payame Noor University (PNU), P.O.Box 19395-4697, Tehran, Iran , behsalehi@gmail.com
2- Department of Biology, Payame Noor University (PNU), P.O.Box 19395-4697, Tehran, Iran
3- Graduate of Isfahan University
2- Department of Biology, Payame Noor University (PNU), P.O.Box 19395-4697, Tehran, Iran
3- Graduate of Isfahan University
Abstract: (910 Views)
Exposure to freezing stress causes physiological, biochemical and molecular changes in plants, which are accompanied by reduced growth and development. In cold areas, sensitive species are removed and the geographical distribution is changed. This study was conducted to evaluate some vegetative and biochemical responses of two cold-resistant ornamental plants, viola (Viola wittrockiana) and Snapdragon (Antirrhinum majus), under freezing stress. For this purpose, the minimum temperature in January in three different locations (greenhouse, Isfahan, Fereidoon shahr, respectively) was used to apply freezing treatment on 70-day-old seedlings (20, -3 and -11 Celsius degrees, respectively). After 15 days, following the intensfication of coldness, seedling weight changes and dry weight of both plants were significantly reduced. The highest decrease in growth was related to the lowest temperature. Lowering the temperature increased the amount of chlorophyll, carotenoids, anthocyanin’s, proline, glycine betaine and malondialdehyde (MDA). It seemed that increasing photosynthetic and vacuole pigments along with the accumulation of osmolites such as proline and glycine betaine not only concentrated the cytoplasm through osmotic regulation, but also protected plans from freezing in sub-zero temperatures, It had also somewhat reduced the destructive effects of freezing caused by the formation of free radicals and peroxidation of cell membranes.
Article number: 16
Type of Study: Research |
Subject:
thermal stress
Received: 2021/12/9 | Accepted: 2022/03/7 | Published: 2022/05/23
Received: 2021/12/9 | Accepted: 2022/03/7 | Published: 2022/05/23
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