| 水分胁迫下超旱生植物梭梭的结构变化 |
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| 引用本文： | 侯彩霞,周培之.水分胁迫下超旱生植物梭梭的结构变化[J].干旱区研究,1997,14(4):23-25. |
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| 作者姓名： | 侯彩霞 周培之 |
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| 作者单位： | 新疆大学生物系!乌鲁木齐，830046 |
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| 摘 要： | 梭梭同化枝的栅栏细胞层下为第二层光合细胞，其功能与Ｃ４植物维管束鞘细胞相同。自然风干４天失水５８％时，结构变化不显著，浸水处理２４小时，两层光合细胞的质膜弯曲，内陷；叶绿体膨胀，液泡体积增大。浸水４２小时，细胞结构发生很大变化，有大量细胞浸出物出现，核膜也略有肿胀。
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| 关 键 词： | 梭梭 水分胁迫 结构 旱生植物 |
Structural Changes of Super-xerophyte Haloxylon ammodendron under Water Stress |
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| Hou Caixia Zhou Peizhi.Structural Changes of Super-xerophyte Haloxylon ammodendron under Water Stress[J].Arid Zone Research,1997,14(4):23-25. |
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| Authors: | Hou Caixia Zhou Peizhi |
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| Institution: | Biology Department. Xinjiang University Urumuqi |
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| Abstract: | Between the palisade tissue and the parenchyma of Haloxylon ammodendronassimilation branch, there is another layer of cells which also have chloroplasts just like thebundle u sheath cells in C4 plant. The ultrastructrue of the photosynthetic cells did notchange obviously after drying slowly and lossing 58% water. Under flooding treatment, in24h, the plasma membranes of the two layers of the photosynthetic cells bent and becameconcave, the chloroplasts expanded and the vacuoles enlarged- After 42h, the cell structureschanged considerably, a great amount of cellular extracts emerged, the nuclear membranesalso lightly swelled. |
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| Keywords: | Haloxylon ammodendron water stress ultrastructure |
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