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利用浮力法测定了大豆主茎不同节位叶片体积、厚度、密度、叶内空间体积及叶片和叶肉密度,结合叶片光合速率、可溶性蛋白及叶绿素含量的测试,分析了各性状在大豆植株上的立体表现,比较了叶形相似的有限和无限结荚习性两个大豆品种主茎叶片结构及光合性状的差异。结果如下: 叶片在初生叶,7—8和13—16节复叶较厚,以单位叶面积表示的光合速率,可溶性蛋白含量,叶绿素含量也在初生叶,7—8和13—16节复叶出现峰值。上述峰值的位置与叶片体积、叶肉体积、叶内空间体积、叶片密度、叶肉密度的峰值位置相似,这表明叶片的光合活性等特性与叶片的解剖结构有密切的关系。 虽然上述性状在以单位叶面积表示时两品种间差异较小,但以整叶表示时差异较大,尤其在中上部节位的叶片上表现更明显,这是因为有限结荚习性的早丰1号中上部节位的叶片较无限型的长农4号同节位的叶片面积大,因而上述性状在早丰1号植株上的分布近似倒塔形,而在长农4号则近似纺缍形。
The buoyant method was used to determine the leaf volume, thickness, density, leaf volume and leaf mass density at different internode stem segments in soybean. The photosynthetic rate, soluble protein and chlorophyll content of the leaves were measured. Three-dimensional representation was made to compare the differences in the structure and photosynthetic traits of the main stems of two soybean cultivars with similar and limited leaf-shape habits. The results are as follows: The leaves in the primary leaf, 7-8 and 13-16 thicker compound leaf, the unit leaf area that photosynthetic rate, soluble protein content, chlorophyll content also in the primary leaf, 7-8 and 13-16 Leaves appear spikes. The location of the peak is similar to the peak position of leaf volume, leaf volume, leaf volume, leaf density and leaf density, which indicates that the leaf photosynthetic activity is closely related to leaf anatomy. Although the above traits show small differences between the two cultivars when expressed in unit leaf area, the differences in the whole leaf represent large differences, especially in the leaves of the middle and upper internodes, because of the early abundance of limited pod habit The leaf area of mid-upper node of No.1 was larger than that of Changnong-4 of the same size. Therefore, the distribution of the above-mentioned traits was approximately inverted tower in the plant of Zhaofeng-1,缍 shape.