| 冬小麦幼苗叶片适应土壤干旱的生理机制 |
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| 引用本文： | 单长卷,任秀娟. 冬小麦幼苗叶片适应土壤干旱的生理机制[J]. 西南大学学报(自然科学版), 2006, 28(2): 219-222,243 |
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| 作者姓名： | 单长卷 任秀娟 |
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| 作者单位： | 河南科技学院生命科技学院 河南新乡453003 |
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| 基金项目： | 河南科技学院重点科研资助项目基金(040124) |
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| 摘 要： | 采用盆栽试验对冬小麦幼苗叶片适应土壤干旱的生理机制进行了初步研究。结果表明,随干旱胁迫的加剧,幼苗叶水势、叶片相对含水率、叶片日均蒸腾速率和气孔导度均降低,饱和亏、可溶性糖含量、脯氨酸含量、质膜透性以及SOD和POD活性均呈增加趋势。这说明,在干旱胁迫下,冬小麦幼苗通过改变叶片内部的生理变化和降低蒸腾来适应干旱逆境。
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| 关 键 词： | 土壤干旱 冬小麦 叶片 生理机制 |
| 文章编号： | 1000-2642（2006）02-0219-04 |
| 收稿时间： | 2005-12-25 |
| 修稿时间： | 2005-12-25 |
PHYSIOLOGICAL MECHANISM ADAPTATION TO SOIL DROUGHT BY THE LEAVES OF WINTER WHEAT SEEDLINGS |
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| SHAN Chang - juan, REN Xiu - juan. PHYSIOLOGICAL MECHANISM ADAPTATION TO SOIL DROUGHT BY THE LEAVES OF WINTER WHEAT SEEDLINGS[J]. Journal of southwest university (Natural science edition), 2006, 28(2): 219-222,243 |
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| Authors: | SHAN Chang - juan REN Xiu - juan |
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| Affiliation: | Henan Institute if Science and Technology, Xinxiang, Henan 453003, China |
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| Abstract: | Two winter wheat cultivars were grown in a pot experiment and were subjected to 4 water treatments(normal water supply,light drought, medium drought and severe drought) from seedling emergence to early tillering stage and various physiological indicators of the leaves were determined.Leaf water potential,leaf RWC(relative water content),mean transpiration rate and stomatal conductance decreased with soil water,and leaf WSD(water saturation deficit),soluble sugar content,proline content,permeability of plasma membrane and SOD and POD activities increased with decreasing soil water.It is thus concluded that wheat leaves changed their inner physiological characters and decreased their transpiration rate as a response to water stress. |
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| Keywords: | soil drought winter wheat leaf physiological mechanism |
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