| 干旱胁迫对长春花光合特性及可溶性糖的影响 |
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| 引用本文： | 孙萍,段喜华.干旱胁迫对长春花光合特性及可溶性糖的影响[J].东北林业大学学报,2010,38(8). |
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| 作者姓名： | 孙萍 段喜华 |
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| 作者单位： | 森林植物生态学教育部重点实验室(东北林业大学),哈尔滨,150040;森林植物生态学教育部重点实验室(东北林业大学),哈尔滨,150040 |
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| 摘 要： | 为了探讨干旱胁迫对长春花的生长繁殖、光合特性及可溶性糖的影响,测定不同土壤湿度下的长春花幼苗叶片的净光合速率、蒸腾速率、气孔导度、糖含量等生理指标及叶片数、株高、花数等形态指标。结果表明:轻度干旱胁迫下(土壤体积相对含水量55%～60%),其生理及形态方面均没有发生明显的变化;重度干旱胁迫下(土壤体积相对含水量30%～35%),长春花的营养生长及生殖生长均受到明显的抑制,净光合速率、蒸腾速率、气孔导度显著下降的同时,水分利用率明显升高,这表明长春花具有强抗旱性;中度干旱下(土壤体积相对含水量40%～45%)使长春花由营养生长向生殖生长过渡,蔗糖的积累起到了促进作用。中度和重度干旱胁迫下,可溶性糖含量大量积累提高了植株的渗透势,其中蔗糖和葡萄糖为主要的渗透调节物质。
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| 关 键 词： | 干旱胁迫 光合作用 可溶性糖 长春花 |
Effects of Drought Stress on Soluble Sugars and Photosynthetic Characteristics of Catharanthus roseus Seedlings |
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| Sun Ping,Duan Xihua.Effects of Drought Stress on Soluble Sugars and Photosynthetic Characteristics of Catharanthus roseus Seedlings[J].Journal of Northeast Forestry University,2010,38(8). |
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| Authors: | Sun Ping Duan Xihua |
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| Institution: | Sun Ping,Duan Xihua(Key Laboratory of Forest Plant Ecology (Northeast Forestry University),Ministry of Education,Harbin 150040,P.R.China) |
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| Abstract: | Net photosynthetic rate,transpiration rate,stomatal conductivity,sugar content,leaf quantity,individual plant height,flower quantity of Catharanthus roseus were determined under different soil relative water contents(RWC) in order to study the effects of drought stress on soluble sugars,photosynthetic characteristic and growth of C.roseus.Results indicate that there are no obvious changes in the physiological and morphological characteristics of C.roseus under mild drought stress (RWC=55%-60%),while the veg... |
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| Keywords: | Drought stress Photosynthesis Soluble sugars Catharanthus roseus |
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