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The Effect of Heat Stress on Morpho-Anatomical Characteristics and Some Biochemical Traits in Kiwifruit Buds of Hayward Variety (Actinidia deliciosa cv. Hayward)
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Maryam Mirarzgar   , Reza Fotouhi Ghazvini , Mahmood Ghasemnezhad |
| University of Guilan |
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Abstract: (307 Views) |
Kiwifruit is one of the main exportable horticultural crops in Iran. Flower buds’ abortion of kiwifruit in response to heat stress causes reduction of fruit yield. Furthermore, these led to formation flat or fan-shaped fruits, which itself is accompanied with decrease in fruits quality. This study was conducted based on a completely randomized design. The effect of heat stress on some morpho-anatomical and biochemical characteristics of flower buds on “Hayward” Kiwifruit was investigated. The excised cuttings from canes were transferred to growth chamber with temperature 24/17-degree day/night, after meeting the chilling requirement. Thereafter, the cuttings at three stages of the end of dormancy bud, woolly bud and breaking bud, were exposed to high temperature stress (32/25 degrees’ day/night for 72 hours). The results showed that the highest damage of heat stress was found immediately at the end of dormant period. So that, 63 percentage of flower buds were aborted. The flower bud abortion was decreased when advanced bud phenological stages was exposed to heat stress. In contrast, heat stress in advanced bud phenological stage resulted in flower malformation. The highest malformation with 41 percentages was observed in breaking treated buds. Furthermore, protein content in treated bud at the end of dormant phase significantly reduced as compared to control buds. The ion leakage and tissue necrosis in treated buds increased as compared to control buds.
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| Keywords: Woolly Bud, Bud Break, Malformation Flower Bud, Aborted Flower Bud |
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Full-Text [PDF 752 kb]
(83 Downloads)
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Type of Study: Research |
Subject:
Pomology
Received: 2023/07/8 | Accepted: 2023/09/4 | Published: 2025/03/10
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