摘要
二、四倍体萝卜光合特性比较研究表明:四倍体叶片厚度、叶绿素含量和叶面积明显高于二倍体,且其气孔增大,密度减小。二倍体和四倍体的净光合速率(Pn)和气孔导度(Gs)均随光强增大而增加;而细胞间隙CO2浓度(Ci)随光强增强缓慢下降。二倍体的净光合速率、气孔导度和细胞间隙CO2浓度均高于四倍体。四倍体的光饱和点(LSP)为1 960μmol.m-2.s-1,光补偿点(LCP)为59.87μmol.m-2.s-1,均高于二倍体。
Related characteristics with photosynthesis were measured using diploid（03R-2）and colchicine-induced tetraploid by 03R-2 plants of radish（Raphanus sativus L. ）. Blade thickness,chlorophyll content and blade area of tetraploid radish are higher than those of diploid ;while stomatal density lower. In diploid and tetraploid radish, photosynthetic rate（Pn） and stomatal conductance（Gs） increase with light intensity. Intercellular CO2 concentration（Ci） slowly reduces with light intensity, almost reaching the lowest but retaining balance. Pn, Gs and Ci in diploid are higher than those in tetraploid. Tetraploid light saturation point（LSP） is 1 960 μmol·m^-3·s^-1,with a light compensation point（LCP） of 59.87 μmol·m^-3·s^-1, which are higher than those of diploid.
出处
《中国生态农业学报》
CAS
CSCD
2008年第1期164-167,共4页
Chinese Journal of Eco-Agriculture
基金
江苏省重大攻关招标项目(BE2002304)资助
关键词
萝卜
二倍体
四倍体
光合速率
气孔导度
细胞间隙CO2
浓度
光饱和点
光补偿点
Raphanus sativus L. , Diploid, Tetraploid, Photosynthetic rate, Stomatal conductance, Cellular CO2 concentration, Light saturation point, Light compensation point
