中华红杨叶片生长过程中光合特性及花青素的关系研究Research on the Relationship between Photosynthetic Characteristics and Anthocyanins during the Populus×euramericana Leaf Growing
吴冰洁;张永忠;吴玉厚;石雷;刘立科;郭尚敬;郭善利;姜闯道;
摘要(Abstract):
[目的]探讨红杨叶片发育过程中从幼叶到老叶的光合特性和花青素的关系。[方法]通过气体交换、叶绿素荧光和光谱技术研究了中华红杨叶片发育过程中的光合特性及与气孔发育的关系。[结果]①随着叶片的生长,花青素含量逐渐降低,叶绿素含量迅速增加。②光饱和光合速率随着叶片面积的增加而持续升高,但气孔导度的增加明显滞后。③增加CO2浓度时不同发育阶段的叶片净光合速率均有大幅度增加,但叶片发育后期光合速率增加程度较大。④光系统Ⅱ(PSⅡ)的最大光化学效率(Fv/Fm)在叶片发育过程中增加幅度较小(<15%)。[结论]叶片发育过程中存在明显的气孔限制;随着中华红杨叶片的生长光合机构逐步完善,叶绿素含量增加和花青素含量降低是叶片从红色逐渐变成绿色的主要原因。
关键词(KeyWords): 中华红杨;光合作用;花青素;叶绿素荧光
基金项目(Foundation): 国家自然基金项目(30770223、30871455);; 北京市财政项目[京财预指(2008)第0178号]
作者(Author): 吴冰洁;张永忠;吴玉厚;石雷;刘立科;郭尚敬;郭善利;姜闯道;
Email:
DOI: 10.13989/j.cnki.0517-6611.2010.09.110
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