Sporangia and Spores in the Fern Genera Spicantopsis and Struthiopteris (Blechnaceae, Polypodiopsida)

Struthiopteris (Blechnaceae) has recently been classified on the basis of molecular and morphological evidence, and some of its species are now included in the sister genus Spicantopsis . However, the lack of studies on several important morphological features impedes a sound assessment of their con...

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Published in:The Botanical review 2020-03, Vol.86 (1), p.76-92
Main Authors: Molino, S., Prada, C., Gabriel y Galán, J. M., Wasowicz, P., Estébanez, B., Vázquez, R.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Blechnaceae
Clothing industry
Ferns
Genera
Life Sciences
Morphology
Plant Anatomy/Development
Plant Ecology
Plant Physiology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Scanning electron microscopy
Sporangia
Spores
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description Struthiopteris (Blechnaceae) has recently been classified on the basis of molecular and morphological evidence, and some of its species are now included in the sister genus Spicantopsis . However, the lack of studies on several important morphological features impedes a sound assessment of their congruence with this new systematic arrangement, as well as of their range of variation and taxonomic value in this group of ferns. Here we present a study on the spores and sporangia using both light and scanning electron microscopy in Struthiopteris and Spicantopsis , using samples of all their species, and almost all their varieties. We provide full morphological descriptions of the spores and sporangia of all these taxa. We point out that the perispore structure and ornamentation and the number and the thickness of stomium cells in the sporangium clearly distinguish both genera.
doi_str_mv 10.1007/s12229-020-09217-z
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subjects Biomedical and Life Sciences
Blechnaceae
Clothing industry
Ferns
Genera
Life Sciences
Morphology
Plant Anatomy/Development
Plant Ecology
Plant Physiology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Scanning electron microscopy
Sporangia
Spores
title Sporangia and Spores in the Fern Genera Spicantopsis and Struthiopteris (Blechnaceae, Polypodiopsida)
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