黑龙江绣线菊属15种植物导管分子形态结构研究

Morphology structure of vessel element of Spiraea in Heilongjiang Province

利用扫描电子显微镜和管道铸型技术对黑龙江绣线菊属15种植物导管分子的管腔微形态结构特征进行比较研究。结果显示:该属植物导管分子的管腔长度、宽度和端壁斜度角存在差异;窄叶绣线菊观察到互列式纹孔排列,绢毛绣线菊、石蚕叶绣线菊、柳叶绣线菊、曲萼绣线菊和耧斗菜绣线菊观察到对列互列同时存在的纹孔排列方式,土庄绣线菊、美丽绣线菊、石棒绣线菊、楔叶绣线菊、华北绣线菊、三裂绣线菊、珍珠绣线菊、海拉尔绣线菊和毛果绣线菊观察到对列式纹孔排列;孔纹导管在所研究的植物中均存在;网纹导管存在于曲萼绣线菊、毛果绣线菊和美丽绣线菊;螺纹导管存在于华北绣线菊、珍珠绣线菊、土庄绣线菊、石棒绣线菊和海拉尔绣线菊。本文给出了导管分子管腔的微形态结构特征,为该属植物的系统演化方式提供形态学依据;讨论了导管分子微形态结构特征及其与环境的适应性。

A study on morphology structure of vessel molecular of the genus Spiraea in Heilongjiang province was conducted by scanning electron microscope （ SEM） and resin casting method. The results show that there is obvious difference in the length, the width and the slope of vessel molecules. Opposite pitting was observed in the S. dahurica Maxim. Opposite pitting and alternate opposite in the S. sericea Turcz. , S. chamaedryfolia Linn. , S. salicifolia Linn. , S. flexuosa Fisch. ex Camb. , and S. aquilegifolia Pall were also observed. Alternate pitting was observed in the S. pubescens Turcz. , S. elegan Pojark. , S. media Schmidt. , S. canescensD. Don. , S. fritschiana Schneid. , S. trilobata Linn. , S. pubescens Turcz. , S. hailarensis Liou. and S. trichocarpa Nakai. The morphological types of vessel molecules： all of the Spiraea have pitted; reticulate exists in the S. flexuosa Fisch. ex Camb. , S. trichocarpa Nakai. and S. elegan Pojark.;sppiral exists in the S. thunbergli Sieb. ex Bl. ,S. pubescens Turcz. ,S. pubescens Turcz. ,S. media Schmidt. And S. hailarensis Liou. . The morphological structures of the inner wall of the vessel molecules were provided. These can provide morphological basis for the evolution of Spiraea system and discussing their adaptability and environment.