三种阔叶树雌雄异株木材结构的比较

Structural Comparison of Dioecious Wood among Three Species of the Broadleaved Trees

在光学显微镜下较详细地比较了重阳木（Ｂｉｓｃｈｏｆｆｉａｊａｖａｎｉｃａ）、大叶刺篱木（Ｆｌａｃｏｕｒｔｉａｒｕｋａｍ）和红毛丹（Ｎｅｐｈｅｌｉｕｍｌａｐｐａｃｅｕｍ）雌雄异株木材的结构。结果表明：同一种树木两性间木材结构总体上是很相似的，但有的定量特征差异显著甚至极显著。３个种的树木中，雌株木纤维壁腔比值较雄株的大，而分膈纤维和纤维管胞数量较小。雌株木材结构特点可能表明其木材具较强的机械支持能力，利于对果实的支持。

The structures of the woods of the female and male trees in Bischoffia javanica, Flacourtia rukam and Nephelium lappaceum were comparatively described in detail.The results showed that the overall characters of the dioecious woods were generally quite similar, however, some significantly or extremely signicantly different charateristics, although being similarly occurred among the three species, still existed between the male and female woods within the same species. Within the three species, the ratios of the wood fiber wall thicknesses /lumen diameters in the female woods are larger than the ones in the male woods, and the numbers of the septate fibers and the fiber tracheids are smaller. It is considered that the female wood might possess a greater mechanical weight bearing force in supporting the fruit.