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第 28卷第 2期植物研究 2008年 3月
Vol. 28 No. 2 BULLETIN OF BOTAN ICAL RESEARCH Mar. , 2008
子属(CotoneasterMedikus)植物叶表皮微形态特征及其分类学意义
丁松爽孙坤苏雪董莉娜张爱梅
(西北师范大学生命科学学院,兰州 730070)
摘要在光学显微镜和扫描电镜下,对子属(Cotoneaster Medikus) 2组 15种植物的叶表皮特
3 征进行了2观察,发现疏花组( Sect. Cotoneaster)植物叶表皮细胞多为多边形,垂周壁一般为平直—
弓形,气孔均为无规则型;单花组( Sect. Uniflos)植物叶表皮细胞常不规则型,垂周壁多浅波状,气
孔除无规则型( anomocytic)外还兼有十字型( staurocytic) 、四分体型( tetracytic)和等三体型( isotri
cytic) 。依据气孔周围角质膜特征等叶表皮性状,把 15种植物分为 W 型、S型和 I型,其中 W 型
是 S型的特化类型,疏花组的种类为 W 型或 S型,单花组的种类为 I型。叶表皮微形态特征可以
为子属植物组及种的分类学处理提供解剖学资料。
关键词子属;叶表皮;分类学意义
中图分类号: Q949 文献标志码: A 文章编号: 1673 - 5102 (2008) 02 - 0187 - 08
Characters of L eaf Ep iderm is and The ir Taxonom ic S ign if icance in
Cotoneaster M ed ikus
D ING Song Shuang SUN Kun SU Xue DONG L i Na ZHANG A iMei
(College of L ife Science, Northwest Normal University, Lanzhou 730070)
Abstract The leaf ep iderm is of 15 species, rep resenting two sections of the genus Cotoneaster was in
vestigated using light m icroscopy (LM ) and scanning electron m icroscopy( SEM ). In Sect. Cotoneaster,
leaf ep idermal cells are usually polygonal in shape, straight to arched in pattern of anticlinal wall, and
the stomata are anomocytic. W hile in Sect. Uniflos, leaf ep idermal cells are usually irregular in shape,
repand or sinuous in pattern of anticlinal wall, the stomata are anom