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美国白腊树(Fraxinus americana L)树皮经过环割1米左右,仍可以再生新的树皮。美国白腊树剥皮后的表面,靠近表面部分木射线细胞增殖呈球形膨大,靠近表面的其他未成熟的木质部细胞也进行分裂,呈现不规则的突起,逐渐横向地与邻近射线连成一片,覆盖了整个表面。一些未成熟的木质部分子逐渐转化形成新的形成层,到了剥皮后2——3个月,由于新形成层的不断分裂活动,逐渐将形成层区连成一圈,以后基本上与正常树皮维管组织的发育一样。很多树木的树皮是一种重要的中药,采取这种原料,长期以来都是靠伐木取皮的,这样严重地影响了这种资源的长期利用。关于杜仲、黄柏环割剥皮后,对于树木生长和再生的影响已有不少的研究,但尚无对美国白腊树环割剥皮成功的报导。我们对美国白腊树剥皮以后新皮形成过程的组织分化,进行了一系列的解剖学观察,作为进一步研究其他树木剥皮再生树皮的基础。
The bark of American balsam (Fraxinus americana L.) can be regenerated once it is about 1 meter apart. The surface of the American white wax tree peeled, close to the surface part of the proliferation of wood-ray cells were spherical bulky, close to the surface of other immature xylem cells also split, showing irregular protrusions, and gradually become adjacent with the adjacent rays, covering The whole surface. Some immature xylem sub-gradually transformed into a new formation layer, to 2 to 3 months after skinning, due to the continuous formation of the new layer of activity, and gradually form a layer of area connected in a circle, and later basically with the normal bark Tubal tissue development is the same. The bark of many trees is an important traditional Chinese medicine. The use of such raw materials has long been based on the use of harvested timber, which has seriously affected the long-term use of such resources. About Eucommia, Phellodendron cut ring after peeling, for the growth and regeneration of trees have been a lot of research, but there is no report of the success of the United States cut wax ring peeling. We conducted a series of anatomical observations on the histological differentiation of the new cuticle after the peeling of the American white wax tree and served as the basis for further study of the regenerated bark of other trees.