3个杨桃品种茎次生木质部导管分子结构研究  

Studies on the Molecular Structure of Vessels in Secondary Xylem of Stem from Three Carambola Varieties

作　　者：陈燕[1] 袁长春[1] 陈小婷[1] 

机构地区：[1]湛江师范学院生命科学与技术学院,广东湛江524048

出　　处：《安徽农业科学》2008年第32期14062-14064,14080,共4页Journal of Anhui Agricultural Sciences

基　　金：广东省自然科学基金资助项目(04300850)

摘　　要：[目的]为杨桃的品种鉴定及果树栽培提供理论依据。[方法]运用细胞图象分析系统及显微照相方法，对3个杨桃品种（秤锤杨桃、蜜丝杨桃、红杨桃）茎次生木质部导管分子结构进行研究。[结果]杨桃茎次生木质部导管分子有两端具尾、一端具尾和无尾3种类型；导管分子平均长度为328．88-366．09μm，平均宽度为44．61～52．43μm；端壁多数为单穿孔板；壁上纹孔式以互列-对列混合纹孔式为主。[结论]杨桃导管分子的多数特征表现为导管分子系统演化过程中较为进化的特征，但也存在导管两端或一端有尾、端壁倾斜等较为原始的性状；杨桃导管分子的结构与其生态适应性相一致，不同品种的生长特性也与导管分子结构差异相一致。[Objective ] The aim of this study was to provide the theoretical basis for variety identification of carambola and pomicuhure. [Method] The molecular structure of vessels in stem secondary xylem from three carambola varieties of Malaysia 8, Misi and Malaysia B17 were studied by cell image analysis system and microphotography. [ Result] The molecular structure of vessels in stem secondary xylem from carambola was as follows ： the first type had tails in two ends, the second type had tail in one end, and the third type had no tails in two ends. The average length of vessel elements was from 328.88 to 366.09 μm, while its average width was from 44.61 to 52.43 μm. Most of the end wall was simple perfo- ration plates, while the alteruate-opposite pitting was the major forms of pitting. [ Conclusion] Most characteristics of vessel elements from caram- bola were evolutionary characters of vessel elements in the process of phylogeny, but there were more primitive characters, for example, both two ends of vessel had tails or just one end had tail, and end wall was inclined. The molecular structure of vessel from carambola was in accordance with its ecological adaptability, and the growth characteristics of different varieties were also in accordance with the difference of molecular structure of vessel.

关 键 词：杨桃 导管分子 显微结构 

分 类 号：S662.1[农业科学—果树学]