Ultrastructural features of Aloe ciliaris pollen View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1988-06

AUTHORS

F. Ciampolini, A. Moscatelli, M. Cresti

ABSTRACT

Both the internal anatomy and the external morphology of the mature pollen grain of Aloe ciliaris have been studied, together with the cytological changes occurring during pollen activation. In mature pollen, the generative cell (GC) and the vegetative nucleus (VN) are closely associated with each other, and both can be found in the central part of the grain. In the generative cytoplasm, some organelles and microtubular bundles are present. In the vegetative cell, dictyosomes, stacks of rough endoplasmic reticulum, mitochondria, plastids, vacuoles, ribosomes, and masses of fibrillar material have been described. During pollen activation, important changes occur in both the generative and vegetative cells (VC). In the GC, the microtubular bundles become clearly visible, and the GC and VC gradually move towards the germ pore. The RER cisterns become free from the stacks, and organelles, such as dictyosomes, become very active. The fibrillar masses gradually decrease in number, and the individual fibrils become more evident and clearer in resolution. More... »

PAGES

88-96

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00189267

DOI

http://dx.doi.org/10.1007/bf00189267

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1052887598


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