轿子山六种杜鹃花属植物中气孔群的发现

Discovery of stomatal groups in six species of Rhododendron in Jiaozishan

采用印迹法制取叶表皮印迹装片,观察了分布于云南省轿子山国家级自然保护区的6种杜鹃花属(Rhododendron)植物的叶表皮微形态结构,利用IT 2.00软件进行叶表皮形态指标的测量。结果表明,在6种杜鹃花属植物中,气孔成群分布,形成明显的气孔群。在气孔群内,1个气孔群气孔之间的平均距离极显著小于相邻两气孔群之间的平均距离。这是首次在杜鹃花属植物叶片上发现气孔群现象,并对气孔群的生理作用及形成机制进行了初步探讨。

The leaf epidermal micromorphological pattern of six species of Rhododendron plants distributed in the Jiaozishan National Protected Area in Yunnan province were observed by the imprinting method.The leaf epidermal morphological index was measured in the software IT 2.00.The results showed that the stomata were distributed in groups in the six Rhododendron plants;and the signifi⁃cance test analyses exhibited that the average distance between the stomata within the stomatal group was significantly smaller than that between adjacent two stomatal groups.This phenomenon of stomatal groups is firstly found on the leaves of Rhododendron plants,and the physiological effects and formation mechanisms of stomata groups have been discussed.