广东樟科主要属种的木材系统解剖

本文研究了广东樟科植物9属26种的木材构造。 研究表明,在地处热带北缘及亚热带的广东,樟科木材的成熟年龄在18～45年之间,在同属不同种之间,其木材成熟所需的时间比较接近,表明了各属植物遗传上的相近性。 樟科植物从木材解剖特征来看,无论是幼态材或者成熟材都不是原始的。 樟科是一个自然的分类群,各属间木材解剖特征区别不很明显。鳄梨族的琼楠属和厚壳桂族的厚壳桂属在木材构造上比较相似,很可能是鳄梨族通过琼楠亚族向厚壳桂族发展。木姜子族的木姜子属、新木姜子属和山胡椒属的木材解剖特征很接近,形成了自然的类群。

SYSTEMATIC WOOD ANATOMY OF LAURACEAE IN GUANGDONG PROVINCE

In the present paper is reported study on the wood of 9 genera including 26 species of Lauroceae in Guangdong Province.The ages of the wood becoming mature are shown by the variations in their fibre lengths. The results indicated that the maturing ages of wood of Lauraceas varied from 18 to 45 years in Guangdong Province which includes both subtropical area and the northern edge of the tropics. Within genus, the maturing ages were the same or similar among species,showing inherent intrageneric similarity.The wood structures of these 9 genera were compared and their systematic relationships discussed. It seemed that the relation between Beilschmiedia and Cryptocarya was much more closer than other genera according to their general wood structure,geographic distribution as well as their abundance of axial parenchyma. It is probable that Cryptocarya was derived from Perseeae as deduced by the increasing of axial parenchyma. Judging from wood anatomical structure,the laurel family formed a natural taxonomical group with no obvious distinction among the genera.