鄂尔多斯高原碱湖的钝顶螺旋藻光合生理研究  

Photosynthetic Physiology of Spirulina(Arthrospira) platensis in the Alkaline Lakes Erdos Plateau

作　　者：刘华[1,2] 乔辰[3] 王志忠[3] 巩东辉[3] 

机构地区：[1]西北农林科技大学资源环境学院,杨凌712100 [2]中国林业科学研究院,森林生态环境与保护研究所 [3]内蒙古农业大学农学院,呼和浩特010019

出　　处：《植物学通报》2005年第B08期57-63,共7页Chinese Bulletin of Botany

基　　金：国家自然科学基金项目(39960062);内蒙古自然科学基金项目(990303-4)资助

摘　　要：鄂尔多斯高原碱湖的钝顶螺旋藻光合色素含量高低排列为藻胆素>叶绿素a>类胡萝卜素;各色素具有特定的吸收光谱,活体吸收光谱体现出了各色素的吸收;各色素的荧光发射主峰波长约长于活体的13￣35nm,相对荧光强度约是活体的11倍。其光合速率的日变化呈单峰曲线,13:00时达到最高;光补偿点为28￣30μmol.m-2.s-1;光饱和点为220￣235μmol.m-2.s-1;光合作用的最适温度为35℃。呼吸速率日变化随温度的升高呈缓慢上升的趋势。Spirulina （Arthrospira）platensis has 3 kinds of photosynthetic pigment. Their contents in Spirulina（Arthrospira） platensis are phycobilin 〉 Chls 〉 carotenoid. Each pigment has its own absorption characteristics in a different spectrum range, and some absorption characteristics appear in the absorption spectrum of ＇the living body. The value of fluorescence emission apexes in all pigments is higher by 13-15 nm than that in the living body. The relative fluorescence density of pigment is 11-fold greater than that in living body. The change of photosynthetic rate is a single-peak curve, and the highest photosynthetic rate is at 13：00 in a day. The light saturation point is 28-30 μmol·m^-2·s^-1, the light compensation point is 220-235 μmol·m^-2·s^-1, and the optimal temperature for photosynthesis is 35 ℃, The respiration rate increases slowly with temperature.

关 键 词：钝顶螺旋藻 光合生理 鄂尔多斯高原 碱湖 鄂尔多斯高原碱湖 光合色素含量 生理研究 吸收光谱 相对荧光强度 最适温度 

分 类 号：Q945.11[生物学—植物学]