摘要
本文采用光学显微镜和扫描电镜,对我国东北地区械属10种变1种的花粉形态进行了观察。本属花粉近球形式长球形,赤道面观为近圆形或窄椭圆形,极面观为3裂圆形,极轴长2.-40μm;具3沟,沟明显;外壁通常具条纹状纹饰,稀具网状纹饰。从观察材料看,本属花粉可归之为2个类型:(1)色木槭型:(Mono maple type):外壁具条纹状纹饰,条纹宽0.250.50μm;(2)梣叶槭型(Ash-leaved maple type):外壁具条网状纹饰,网眼形状不规则,多为长形,长约3μm;网脊宽0.7μm,这正好与分类学家根据形态划分的个亚属相吻合。花粉形态所提供的资料,也支持色木槭(Acermono Maxim.)和平基槭(A.truncatum Bge.)作为两个独立种的处理意见。
The pollen morphology of 10 species and 1 variety in the genus AcerLinn. from NE China was examined under light microscope(LM) and scan-ning electron microscope (SEM). Pollen grains of the genus are subspheroidal or prolate. subcircular ornarrowly elliptic in equatorial view, 3-lobed-rounded in polar view. Polaraxis 20-40μm long, 3-colpate, colpi obvious. Exine usually striped,rarelyreticulate. The pollen grains of genus can be divided into two types from thematerials examined: (1) Mono maple type: [Exine striped, stripes 0.25-0. 50μm broad; (2) Ash-leaved maple type: Exine striped-reticulate, luminairregularly, usually long, about 3μm long. Murus 0. 7m broad. The obser-vation made by the present authors supports the subdivision of Acer intothe subgenera Acer and negundo by many taxonomists based on the othermorphological characteristics, and observation by the present authors is inaccordance with this view. The treatment of Acer mono Maxim. and Acertruncatum Bge. as two independent species is also supported by the pollenmorphology shown in the present work.
出处
《植物研究》
CAS
CSCD
北大核心
1992年第3期309-315,共7页
Bulletin of Botanical Research
关键词
槭属
花粉形态
分类学
Acer
Pollen morphology
Taxonomic signififcance
