| 热胁迫下萝卜不同耐热性品种细胞组织结构比较 |
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| 引用本文： | 韩笑冰,利容千,王建波.热胁迫下萝卜不同耐热性品种细胞组织结构比较[J].武汉植物学研究,1997,15(2):173-178. |
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| 作者姓名： | 韩笑冰 利容千 王建波 |
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| 作者单位： | 武汉大学植物科学系!武汉，430072，武汉大学植物科学系!武汉，430072，武汉大学植物科学系!武汉，430072 |
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| 摘 要： | 利用显微及扫描电镜方法，研究热胁迫下萝卜不同耐热性品种外部形态，叶片及叶柄组织细胞结构的差异，耐热性品种比感热性品种叶表皮气孔密度大，体积小和开度小，部分呈关闭状态，叶片厚，叶肉细胞排列紧密，叶肉细胞很少出现质壁分离；耐热品种叶柄内维管束总面积是感热性品种的１．５倍以上，具发达的形成层及厚壁组织。
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| 关 键 词： | 萝卜 热胁迫 显微结构 |
| 收稿时间： | 1995-11-21 |
| 修稿时间： | 1996-3-14 |
CELLULAR STRUCTURAL COMPARISON BETWEEN DIFFERENT THERMO-RESISTANT CULTIVARS OF RAPHANUS SATIVUS L. UNDER HEAT STRESS |
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| Han Xiaobing,Li Rongqian,Wang Jianbo.CELLULAR STRUCTURAL COMPARISON BETWEEN DIFFERENT THERMO-RESISTANT CULTIVARS OF RAPHANUS SATIVUS L. UNDER HEAT STRESS[J].Journal of Wuhan Botanical Research,1997,15(2):173-178. |
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| Authors: | Han Xiaobing Li Rongqian Wang Jianbo |
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| Affiliation: | Department of Plant Science, Wuhan University Wuhan 430072 |
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| Abstract: | The objective of this study was to investigate the effects of heat stress on leaf and petiole's microscopical structure of different thermo-resistant cultivars of Raphanus sativus L. the results obtained are summarized as follows: Under heat stress, the studied thermo-tolerant cultivars showed higher stomatal density, smaller volume and smaller stomatal opening area on abaxial epidermis than that of thermo-sensitive cultivars. Moreover, we observed those thermo-tolerant cultivars have thicker leaf, denser palisade tissue and smaller stomatic chamber, With more developed vein and much less occurred plasmolysis. Compared to thermo-sensitive cultivar, the petioles of thermo-tolerant cultivar were more study along with more quantity and larger transportation area of vascular stand as well as more active cambium. Based on these phenomena,the relation between the different structure of thermotolerant and thermo-sensitive cultivars were discussed, function of keeping water to avoid injuring under heat stress being discussed as well. |
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| Keywords: | Raphanus sativus L Heat stress Microscopical structure |
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