裸子植物的生化系统学(二)——松科植物的种子蛋白多肽

中国科学院大学学报

裸子植物的生化系统学(二)——松科植物的种子蛋白多肽

胡志昂, 刘长江, 王洪新

(中国科学院植物研究所，北京)

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1984-10-18 发布日期:1984-10-18
通讯作者: 胡志昂

Biochemical Systematics of Gymnosperms (2), Seed Protein Peptides of Pinaceae

Hu Zhi-Ang, Liu Zhang-Jiang, Wang Hong-Xin

(Institute of Botany, Academia Sinica, Beijing)

Received:1900-01-01 Revised:1900-01-01 Online:1984-10-18 Published:1984-10-18
Contact: Hu Zhi-Ang

摘要/Abstract

摘要：

本文用SDS线性梯度聚丙烯酰胺凝胶电泳分析了松科Pinaceae 10属凡50种植物的

种子蛋白多肽。松科植物种子都有含量较高的、分子量为45000道尔顿(简写为45K)的多肽。

分子量大于45K的多肽种类很多，但含量都较低。为了定量地比较各分类群主要种子蛋白多

肽，规定“多肽距离”为两分类群不同的多肽数除两分类群多肽总数的商。各属种间平均多肽

距离和前文报道的酶谱距离有同样的趋势，证明松科分子进化速率的稳定性。除了油杉属和

冷杉属比较接近外，各属间多肽差别很大，说明属间的间断性。种间多肽谱虽有不同程度的变异，但变异是连续的。不同属、不同亚属形态进化和分子进化的比较，表明两种进化在速率和机理上都是不同的。

关键词: 松科, 种子蛋白多肽, 分子进化

Abstract:

By means of SDS linear gradient polyacrylamide gel electrophoresis, seed

protein peptides of 50 species belonging to 10 genera of Pinaceae were analysed. A

major peptide possessing molecular weight about 45000 daltons is shared by every species

in Pinaceae. There are many peptides of higher molecular weight in seeds, but their

content is very low. In order to make a series of quantitative comparisons between any

two taxa, we define “peptide distance” as follows:

number of different peptides between 2 taxa

peptide distance= ------------

total number of peptides in 2 taxa

In the following table, the peptide distances of some genera are shown together with

other molecular data about Pinaceae.

genus	ancientry of genus	antigen distance	zymogram distance	peptide distance
Larix	Miocene to now (25My)	0	0	0.08
Cedrux Pseudotsuga Keteleeria	Oligocene to now (35My)	_ _ _	0 0.17 0.29	_ _ _
Tsuga Abies	Eocene to now (57My)	1.0 _	_ 0.44	_ 0.35
Picea	Late Cretaceous-(67-100 My)	0.5	0.30	0.18
Pinus	Early Cretaceous-(100-130My)	2.3	0.67	0.39

From the data cited above, there are positive correlation between molecular data

and the ancientry of genera in Pinaceae. Therefore, the rate of molecular evolution

seems stable. Based on the data of peptide distances, it is suggested that the variation be

discontinuous between the genera, but continuous within a genus. A comparison between

molecular and morphological evolution indicates that the two evolutions are different not only in rate but in mechanism as well.

Key words: Pinaceae, seed protein peptides, molecular evolution

胡志昂, 刘长江, 王洪新. 裸子植物的生化系统学(二)——松科植物的种子蛋白多肽[J]. 中国科学院大学学报.

Hu Zhi-Ang, Liu Zhang-Jiang, Wang Hong-Xin. Biochemical Systematics of Gymnosperms (2), Seed Protein Peptides of Pinaceae[J]. .

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