Sexual Phase of Three Species of Pteris (Pteridaceae)

This work describes and compares morphogenesis of the gametophyte, or sexual phase, of three ferns, Pteris deflexa, P. denticulata and P. tristicula, through a palynological analysis of live spores. This study was conducted under laboratory conditions; observations and pictures were made using light...

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Published inTropical plant biology Vol. 6; no. 1; pp. 46 - 52
Main Authors Martínez, O. G, Prada, C, Tanco, M. E, Bonomo, M. C
Format Journal Article
LanguageEnglish
Published New York Springer-Verlag 01.03.2013
Subjects
Biomedical and Life Sciences
Ceratopteris
ferns and fern allies
gametophytes
Life Sciences
morphogenesis
Plant Breeding/Biotechnology
Plant Ecology
Plant Genetics and Genomics
Plant Sciences
Pteris
scanning electron microscopy
sexual reproduction
sowing
spore germination
spores
sporophytes
Transgenics
Vittaria
Gametophytes
Ferns
Archegonia
Spores
Antheridia
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Summary:This work describes and compares morphogenesis of the gametophyte, or sexual phase, of three ferns, Pteris deflexa, P. denticulata and P. tristicula, through a palynological analysis of live spores. This study was conducted under laboratory conditions; observations and pictures were made using light and scanning electron microscopy. The pattern of spore germination corresponds to the Vittaria type and gametophytic development corresponds to the Ceratopteris type. We observed that the polymorphous spores of P. denticulata and P. tristicula are viable. Ultrastructural details of the gametophytes revealed that P. denticulata and P. tristicula form antheridia different from those of the remaining Pteris species; the archegonia have necks formed by 4 rows of 4 cells each. The type of reproduction is sexual and sporophytes arise 90 days after sowing.
Bibliography:http://dx.doi.org/10.1007/s12042-012-9114-9
ISSN:1935-9756
1935-9764
DOI:10.1007/s12042-012-9114-9