数字农科院2.0

Physiological and Structural Changes in Apple Tree Branches of Different Varieties during Dormancy

文献类型： 外文期刊

作者： Gongxun Xu;Meiqi He;Deying Zhao;Deguo Lyu;Sijun Qin

作者机构：

关键词： anatomical structure;apple;cold resistance;dormancy;low temperature

期刊名称： Horticulturae

ISSN： 2311-7524

年卷期： 2023 年 9 卷 8 期

页码：

收录情况： SCIE（2023版）

摘要： Low temperature is an abiotic stress factor limiting the distribution of fruit tree cultivation areas. As temperate deciduous fruit trees, apple (Malus domestica) trees go dormant in the winter to adapt to or avoid damage caused by low temperatures. The capacity for cold resistance is closely linked to the physiological, biochemical, and structural characteristics of one-year-old branches. In this study, we investigated such changes in the branches of cold-resistant ‘Hanfu’ (HF) and cold-sensitive ‘Naganofuji 2’ (CF) apple varieties. The relative electrical conductivity, malondialdehyde content, and reactive oxygen species content of HF branches were lower than those of CF branches, while the antioxidant enzyme activity was higher in HF. The proline, soluble protein, and soluble sugar contents in both varieties showed an initial increase, followed by a subsequent decrease. Sucrose and sorbitol were the main sugar components, but sucrose and fructose were higher in HF than in CF. The periderm, phloem, and xylem of HF branches were also found to be thicker than those of CF branches, while the vessel diameter was smaller and the density greater. The results of this study provide a theoretical reference for further research on the low temperature adaptability of apple tree branches during dormancy.

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