Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructure
ABSTRACT Plagiochilaceae is a family of leafy liverworts that are distributed worldwide. It is of great importance due to its taxonomic and ecological implications among bryophytes. Most species of the family belong to the genus Plagiochila, but there is no consensus regarding its infrageneric circu...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sociedade Botânica do Brasil
2019-03-01
|
| Series: | Acta Botânica Brasílica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019005002107&lng=en&tlng=en |
| _version_ | 1818997190683525120 |
|---|---|
| author | Juliana da Costa Silva-e-Costa Andrea Pereira Luizi-Ponzo |
| author_facet | Juliana da Costa Silva-e-Costa Andrea Pereira Luizi-Ponzo |
| author_sort | Juliana da Costa Silva-e-Costa |
| collection | DOAJ |
| description | ABSTRACT Plagiochilaceae is a family of leafy liverworts that are distributed worldwide. It is of great importance due to its taxonomic and ecological implications among bryophytes. Most species of the family belong to the genus Plagiochila, but there is no consensus regarding its infrageneric circumscription. There have been few palynological studies involving Plagiochilaceae and Plagiochila. Here, we describe the spore morphology of seventeen species of Plagiochila and discuss the taxonomic value of palynological characters for these taxa. The spores were processed by standard palynological techniques and analyzed using light and electron microscopy. The spores were found to be apolar, spheroidal, released monads that vary in size from 13µm to 58µm (small to large size). The sporoderm comprises an intine (stratified), a nexine, and a sexine. The spore surface is ornamented with granules that vary in shape and morphology, thus allowing the studied species to be grouped into four spore types: regular and delicate granulate, irregular and coarse granulate, long granules with flattened apices, and long and straight granules. Hierarchical cluster analysis revealed five different groups of species, evidencing the importance of spore information for taxonomic and phylogenetic studies. |
| first_indexed | 2024-12-20T21:41:42Z |
| format | Article |
| id | doaj.art-afe6edd8db2a4e48ace6ad28fcaa774f |
| institution | Directory Open Access Journal |
| issn | 1677-941X |
| language | English |
| last_indexed | 2024-12-20T21:41:42Z |
| publishDate | 2019-03-01 |
| publisher | Sociedade Botânica do Brasil |
| record_format | Article |
| series | Acta Botânica Brasílica |
| spelling | doaj.art-afe6edd8db2a4e48ace6ad28fcaa774f2022-12-21T19:25:47ZengSociedade Botânica do BrasilActa Botânica Brasílica1677-941X2019-03-01010.1590/0102-33062018abb0418S0102-33062019005002107Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructureJuliana da Costa Silva-e-CostaAndrea Pereira Luizi-PonzoABSTRACT Plagiochilaceae is a family of leafy liverworts that are distributed worldwide. It is of great importance due to its taxonomic and ecological implications among bryophytes. Most species of the family belong to the genus Plagiochila, but there is no consensus regarding its infrageneric circumscription. There have been few palynological studies involving Plagiochilaceae and Plagiochila. Here, we describe the spore morphology of seventeen species of Plagiochila and discuss the taxonomic value of palynological characters for these taxa. The spores were processed by standard palynological techniques and analyzed using light and electron microscopy. The spores were found to be apolar, spheroidal, released monads that vary in size from 13µm to 58µm (small to large size). The sporoderm comprises an intine (stratified), a nexine, and a sexine. The spore surface is ornamented with granules that vary in shape and morphology, thus allowing the studied species to be grouped into four spore types: regular and delicate granulate, irregular and coarse granulate, long granules with flattened apices, and long and straight granules. Hierarchical cluster analysis revealed five different groups of species, evidencing the importance of spore information for taxonomic and phylogenetic studies.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019005002107&lng=en&tlng=enbryophytesliverwortsmorphologypalynologySEMtaxonomyTEMultrastructure |
| spellingShingle | Juliana da Costa Silva-e-Costa Andrea Pereira Luizi-Ponzo Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructure Acta Botânica Brasílica bryophytes liverworts morphology palynology SEM taxonomy TEM ultrastructure |
| title | Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructure |
| title_full | Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructure |
| title_fullStr | Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructure |
| title_full_unstemmed | Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructure |
| title_short | Spores of Plagiochila (Dumort.) Dumort.: the taxonomic relevance of morphology and ultrastructure |
| title_sort | spores of plagiochila dumort dumort the taxonomic relevance of morphology and ultrastructure |
| topic | bryophytes liverworts morphology palynology SEM taxonomy TEM ultrastructure |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019005002107&lng=en&tlng=en |
| work_keys_str_mv | AT julianadacostasilvaecosta sporesofplagiochiladumortdumortthetaxonomicrelevanceofmorphologyandultrastructure AT andreapereiraluiziponzo sporesofplagiochiladumortdumortthetaxonomicrelevanceofmorphologyandultrastructure |