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Ultrastructural changes in maturing pollen grains ofApium nodiflorum L. (Apiaceae), with special reference to the endoplasmic reticulum

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Summary

The ultrastructural events in 3-cellular pollen grains ofApium nodiflorum L. are investigated during pollen maturation. Three distinct developmental stages are distinguished from the formation of sperm cells up to anthesis, whereby the rough endoplasmic reticulum (RER) is mainly involved. The most conspicious form is the highly dilated RER in the vegetative cytoplasm of the youngest pollen grains, which changes to vesicular RER in the following stage. In mature pollen grains the RER has a narrow cisternal configuration and often forms stacks. Pollen activation is preceded by the accumulation of polysaccharide particles.

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Authors and Affiliations

  1. Institute of Botany and Botanical Gardens, University of Vienna, Vienna

    Martina Weber

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  1. Martina Weber
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Weber, M. Ultrastructural changes in maturing pollen grains ofApium nodiflorum L. (Apiaceae), with special reference to the endoplasmic reticulum. Protoplasma 152, 69–76 (1989). https://doi.org/10.1007/BF01323064

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  • DOI: https://doi.org/10.1007/BF01323064

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