干旱胁迫下镜面掌光合作用的动态变化研究本科毕业论文.docVIP

东北农业大学学士学位论文 学号：1座机电话号码232036 干旱胁迫下镜面掌光合作用的动态变化研究 The dynamic changes of photophysiological characters of the mirror palm under drought stress 摘 要 镜面掌是最普遍的室内观叶植物之一，其具有植株低矮，叶形美丽，色泽青绿，繁殖力强，生命力旺盛，养护成本低等优点而受人们喜爱。本研究通过温室盆栽试验方法，研究了观叶植物镜面掌Pilea peperomioides Diels在不同梯度干旱胁迫及复水后的光合生理反应，探索在干旱胁迫下镜面掌的光合生理指标的变化，分析干旱胁迫程度对各光合生理指标的影响，为镜面掌抗旱生理的研究提供理论依据和技术支持。本研究主要结果如下： 在干旱胁迫下，镜面掌的净光合速率（Pn） Abstract Under drought stress, the mirror palm return of net photosynthetic rate Pn , stomatal conductance Gs , transpiration rate Tr , intercellular CO2 concentration Ci photosynthetic physiological indexes of four significant changes, with the stress degree increased net photosynthetic rate Pn , stomatal conductance Gs and transpiration rate were significantly lower Tr , intercellular CO2 concentration Ci to reduce, increase accumulation phenomenon but in the end,Shows that drought stress can significantly affect plant photosynthesis, and the more the number of days drought stress mirror palm photosynthetic capacity decreased, the more obvious, namely, the influence of the greater the degree of drought stress on plant. After palm of drought stress to water treatment, net photosynthetic rate Pn , stomatal conductance Gs , transpiration rate Tr ,intercellular CO2 concentration Ci four indicators were increased, the less drought stress days, its recovery ability is stronger, but were significantly lower than control. Key words: mirror palm; drought stress; photophysiological characters 目录 摘 要 I 1 前言 - 1 - 1.1 研究目的和意义 - 1 - 1.2植物对干旱胁迫的响应 - 1 - 1.3干旱胁迫对光合作用的影响 - 2 - 2 试验材料与方法 - 4 - 2.1试验材料 - 4 - 2.2试验设计 - 4 - 2.3试验内容与方法 - 4 - 2.3.1光合生理指标动态变化的测定 - 4 - 2.4数据处理与分析 - 5 - 3 结果与分析 - 6 - 3.1干旱胁迫条件下镜面掌叶片净光合速率（Pn）的变化 - 6 - 3.2干旱胁迫条件下镜面掌叶片蒸腾速率（Tr）的变化 - 6 - 3.3干旱胁迫条件下镜面掌片气孔导度（Gs）的变化 - 7 - 3.4干旱胁迫条件下镜面掌叶片气孔阻力（Rs）的变化 - 8 - 3.5干旱胁迫条件下镜面掌叶片胞间CO2浓度（Ci）的变化 - 9 - 4 讨论 - 10 - 4.1干旱胁迫下气孔结构指标与气孔导度（Gs）、蒸腾速率（Tr）及光合速率（Pn）的关系 - 10 - 4.2干旱胁迫对镜面掌叶片光合特性的影响分析 - 10 - 5 结论 - 12 - 参考文献 - 13 - 致谢 - 15 - 1 前言 镜面Pile