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[目的]测定丽江山荆子和八棱海棠2份材料在干旱和复水情况下叶片结构的特征指标。[方法]以丽江山荆子(Malus rockii Rehd.)和八棱海棠(Malus robusta(Carr.)Rehd.)为试验材料,利用大棚自然控水-复水进行模拟水分胁迫处理。[结果]丽江山荆子叶片有2层栅栏组织,而八棱海棠叶片栅栏组织由3层柱状细胞构成,且排列紧密。八棱海棠叶片较丽江山荆子厚,栅海比高,气孔密度大,而丽江山荆子叶片气孔对于水分变化较八棱海棠敏感,干旱复水后气孔面积增加幅度是八棱海棠的10倍。干旱复水后,2份材料叶片的SR值提高,栅海比下降,八棱海棠2个指标的变化幅度均大于丽江山荆子。[结论]2份材料叶片在干旱-复水水分胁迫的响应不同,八棱海棠叶片抗旱结构特征较丽江山荆子明显。
[Objective] The research aimed to determine the characteristic index of leaf structure of two materials in Jingjiang Liyang and Bailuncheng under drought and rehydration conditions. [Method] Malus rockii Rehd. And Malus robusta (Carr.) Rehd. Were used as experimental material to simulate water stress treatment by water control and rewatering in greenhouse. [Result] There were 2 layers of palisade tissues in the leaves of Lijiangshan prickly ash, while the palisade tissues of H. palmiurus were composed of 3 layers of columnar cells and arranged closely. The leaf of Prunus carambola is thicker than that of Lijiang, and the stomatal density is high. However, the stomata of leaf of Prunus sibirica are sensitive to the change of water content than that of Prismata yunnanensis. The increase of stomatal area after drought and rewatering is ten times of that of Prunus mume. After drought and rewatering, the SR value of two material leaves increased, the grid-sea ratio decreased, and the change range of two indicators of B. angustifolia was larger than that of Lijiang mountain. [Conclusion] The responses of leaves and leaves of two cultivars to drought-rehydration were different. The structure of drought-resistant structure of B. bracteatum was more obvious than that of P. sibirica.