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| Silva,Dilma Melo da; Sylvestre,Lana da Silva; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| ABSTRACT The palynological diversity of Blechnaceae in the Atlantic Forest was investigated. While the monophyletic family belongs to the group of leptosporangiate ferns, a new classification proposed by recent phylogenetic study reorganizes the family and adds new genera. To expand palynological knowledge of the group, the spore morphology of 23 species and a hybrid, distributed among 10 genera, was described. Material from herbarium collections were submitted to acetolysis and mounted on slides, with subsequent statistical analysis of spore measurements. Photomicrographs of the material were taken under both light and scanning electron microscopy. Perine ornamentation varied among psilate, rugulate and scabrate; granules and gemmae were present along... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Austroblechnum; Blechnum; Spore; Multivariate analysis; Palynology. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300412 |
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| Atala,Cristian; Saldaña,Alfredo; Navarrete,Eduardo. |
| In Chilean temperate forest, the fern Blechnum chilense has a wide ecological breath, but occur mainly in full sun habitats, while Blechnum mochaenum is restricted only to shady sites. We evaluated if the species with different ecological breath behave similarly in their anatomical and physiological traits. Maximal photosynthetic rate (Amax), Stomatal conductance (g s), evapotranspiration (E), and SLA (specific leaf area) were measured in situ in 20 individuals of each fern species. Additionally, we estimated the stomatal density (SD), stomatal index (SI), and stomatal size in leaves of each sampled individual. B. mochaenum, the shade-tolerant species, had lower SD, SI, A, and E, and higher stomatal size and SLA than B. chilense. Higher stomatal frequency... |
| Tipo: Journal article |
Palavras-chave: Blechnum; Stomatal density; Stomatal index; Stomatal size; Gas exchange; Evergreen temperate forest. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432012000100016 |
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| González,Graciela E; Prada,Carmen; Rolleri,Cristina H. |
| Se da a conocer un nuevo recuento cromosómico para Blechnum hastatum y se presenta un análisis de la ontogenia del leptosporangio en ese taxón y en B. occidentale, así como una comparación con leptosporangios adultos de otras especies y subespecies del género, como B. australe subsp. auriculatum, B. glandulosum y B. mochaenum subsp. mochaenum. En relación con la citología de B. hastatum, se contaron 33 bivalentes en diacinesis, lo que indica que se trata de un diploide con un número cromosómico 2n=66, un dato que confrma un recuento previo y ubica al taxón en la secuencia de números cromosómicos básicos conocida para el género, es decir x=33, que es el más frecuente. En el estudio de la ontogenia de los esporangios se comprobó que se forman a partir de... |
| Tipo: Journal article |
Palavras-chave: Blechnum; Número cromosómico; Desarrollo del leptosporangio; Número de células del anillo; Sistemática. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432010000100006 |
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| Chambers, T. Carrick; Farrant, Penny A.. |
| In a taxonomic revision of the genus Blechnum of the Malesian region 20 taxa (17 species and 3 subspecies) are recognised. Much of the past confusion over names, especially of the Papua New Guinea taxa, has been the result of some species being based on inadequate, often single, collections. One new species and one new subspecies are described and two new combinations are made. Fortythree species and seven varieties are put into synonymy. A key, full descriptions, distribution maps and illustrations of the less well understood taxa, as well as scanning electron microscope images of the spores, are presented. Where a taxon also occurs outside the Malesian region, full distributional details are provided, so far as can at present be verified by field... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Blechnum; Malesia; Revision. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/525938 |
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