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|本期目录/Table of Contents|

 滇南风吹楠花粉形态观察()

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年03期
页码:
328-331
栏目:
系统与演化植物学
出版日期:
2011-08-01

文章信息/Info

Title:
 Pollen morphology of Horsfieldia tetratepala
作者:
 张平 徐凤霞*
 中国科学院 华南植物园, 中国科学院植物资源保护与可持续利用重点实验室, 广州 510650
Author(s):
 ZHANG Ping XU Feng-Xia*
 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650, China
关键词:
 滇南风吹楠 肉豆蔻科 花粉形态
Keywords:
 Horsfieldia tetratepala Myristicaceae pollen morphology
分类号:
-
DOI:
-
文献标识码:
A
摘要:
 采用光镜、扫描电镜和透射电镜对滇南风吹楠的花粉形态进行观察。滇南风吹楠的花粉粒呈单粒存在,远极面观为椭圆形,近极面观大体为三角形,为不等极,两侧对称。花粉粒具一条远极单萌发沟;花粉大小为(15)19.90(21) μm×(20)22.50(25) μm。花粉粒外壁纹饰为网状,网脊平均宽度为0.29 μm;网眼形状不规则,大小差异较大。在透射电镜下,花粉外壁可分为覆盖层、柱状层和基层,基层占外壁厚度的1/2。外壁2明显,且厚度不均匀。内壁可分为3层。在远极面萌发沟区域,外壁逐渐减薄,最后消失,仅残留内壁。风吹楠属的花粉形态特征是一致的,而与亚洲分布的其它属的花粉形态有差别,与其它属的分类界限是明确的。
Abstract:
Pollen grains of Horsfieldia tetratepala were examined by using light microscope(LM),scanning electron microscope(SEM)and transmission electron microscope(TEM). Pollen grains of H.tetratepala are boatshaped,with a sulcate aperture on the distal face. The tectum is reticulate. The sizes of pollens are ranging from 1(15)9.90(21) μm×(20)22.50(25) μm. The exine of H.tetratepala could be distinguished into tectum,columella and foot layer. Foot layer is nearly onehalf of the total exine thickness. Endexine is distinct and varies in thickness. Intine can be distinguished into 3 layers. The exine elements(tectum,columella and foot layer)are reduced gradually to a thin foot layer in the colpus area. The pollen characters are basically consistent in Horsfieldia,while some differences exist among different Asian genera,which indicates the definite classification of Horsfieldia.

参考文献/References

备注/Memo

备注/Memo:
更新日期/Last Update: 2011-07-01