ULTRASTRUCTURE OF NICOTIANA-ALATA POLLEN, ITS GERMINATION AND EARLY TUBE FORMATION
ULTRASTRUCTURE OF NICOTIANA-ALATA POLLEN, ITS GERMINATION AND EARLY TUBE FORMATION
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DOI：
10.2307/2443685
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发表时间：
1985-01-01
影响因子：
3
通讯作者：
MULCAHY, G
中科院分区：
文献类型：
--
作者：
CRESTI, M;CIAMPOLINI, F;MULCAHY, G
研究了白杨成熟花粉粒的内部解剖和外部形态，以及花粉的活化和管状萌发及其细胞学分带。成熟花粉的一个特点是在营养细胞细胞质中存在大量堆积的粗内质网池，这些池在花粉激活过程中解离。花粉管一般在水化后2 h 30 min出现，细胞学分带在水化后4 h 30 min完成，形成第一个胼胝质塞。
Both internal anatomy and external morphology of the mature pollen grain of N. alata were studied, together with pollen activation and tube emergence and its cytological zonation. A peculiar feature of mature pollen is the occurrence in the vegetative cell cytoplasm of a large quantity of stacked cisterns of rough endoplasmic reticulum, which then dissociate during pollen activation. Pollen tube emergence generally occurs 2 h 30 min after hydration, while cytological zonation is complete 4 h 30 min after hydration when the 1st callosic plug is formed.