壳寡糖对烟草幼苗生长和光合作用及与其相关生理指标的影响  

Effects of Oligochitosan on the Growth and Photosynthesis and Physiological Index Related to Photosynthesis of Tobacco Seedlings

作　　者：郭卫华[1,2] 赵小明[1] 杜昱光[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]吉林农业大学园艺学院,长春130118

出　　处：《植物生理学通讯》2008年第6期1155-1157,共3页Plant Physiology Communications

基　　金：中国科学院知识创新工程重要方向项目(KSCX2-YW-N-007);国家高技术研究发展计划(863计划)项目(2006AA10A213)。

摘　　要：采用酶解法获得的壳寡糖,处理烟草幼苗的结果显示,0.01 mg·L^(-1)壳寡糖对烟草幼苗生长有促进作用,幼苗株高、叶面积增加;功能叶片中叶绿素含量、净光合速率(P_n)、气孔导度(C_s)、蒸腾速率(T_r)和胞间CO_2浓度(G_i)升高;气孔限制值(L_s)下降。而高浓度(100 mg·L^(-1))壳寡糖处理的则抑制生长。促进烟草幼苗生长最适的壳寡糖浓度为0.01 mg·L^(-1),施用两次的效果优于一次的。Oligochitosan was isolated by enzyme decomposed in our lab. Different concentrations of oligochitosan were used for the treatment of tobacco seedlings, the results indicated that 0.01 mg·L^-1 oligochitosan promoted the growth of tobacco seedlings, the heights of seedlings and the areas of functional leaves were increased, the contents of chlorophyll, the net photosynthetic rate （Pn）, stomatal conductance （Gs）, intercellular CO2 concen- tration （Ci） and transpiration rate （Tr） of tobacco seedlings were increased, while stomatal limitation （Ls） was reduced. High concentration of oligochitosan （100 mg·L^-1） restrained the growth of tobacco seedlings. The most optimum concentration of oligochitosan for tobacco seedlings was 0.01 mg·L^-1. The effects of twice oligochitosan treatment were better than the effects of once.

关 键 词：烟草幼苗 壳寡糖 生长 光合作用 

分 类 号：S572[农业科学—烟草工业] S512.1[农业科学—作物学]