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Comparative thallus anatomy of two Parmotrema (Parmeliaceae, lichenized Ascomycetes) with reticulate maculae Acta Botanica
Barbosa,Suzana Bissacot; Marcelli,Marcelo Pinto.
Using conventional techniques for structural studies under conventional microscopy, polarizing light microscopy and scanning electron microscopy this work describes and compares the thallus anatomy of two Parmotrema species with reticulate maculae, previously included in the genus Rimelia: Parmotrema cetratum (Ach.) Hale and P. clavuliferum (Räsänen) Streimann. The data showed that the species are anatomically similar, including the presence of epicortex, the upper cortex anatomy and the characteristics of rhizines and ciliae. In the medulla of the two species there are star-shaped clusters of hyphae associated with the presence of salazinic acid. This study showed that the anatomical characteristics are constant for the Parmotrema group studied.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomy; Reticulate maculae; Parmotrema; Rimelia.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000300023
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Pseudocyphellae ontogeny and thallus anatomy in species of Punctelia Krog (Parmeliaceae, lichenized Ascomycota) Acta Botanica
Zanetti,Camila Aparecida; Barbosa,Suzana Bissacot; Adachi,Sérgio Akira; Marcelli,Marcelo Pinto.
ABSTRACT The genus Punctelia has been traditionally characterized by the type and distribution of pseudocyphellae, medullary chemical substances and the shape of conidia, whereas its species have been distinguished using mainly the shape, location, abundance and size of pseudocyphellae. Given that Punctelia is not monophyletic, additional studies are needed to determine its current delimitation. The present study used conventional techniques for structural studies using optical and scanning electron microscopy in order to describe and compare the structure and ontogeny of the pseudocyphellae of five species of Punctelia. The main differences among the studied species involve the type of pseudocyphellae development, the presence or absence of an epicortex...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeroplectenchyma; Lichen anatomy; Light microscopy; Parmeliaceae; Plectenchyma; Pseudocyphellae; Punctelia.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100051
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Thallus anatomy of Canoparmelia texana (Parmeliaceae, lichenized Ascomycota) Biota Neotropica
Barbosa,Suzana Bissacot; Machado,Silvia Rodrigues; Marcelli,Marcelo Pinto.
Conventional techniques for structural studies under light microscope and scanning electron microscope were employed to describe the histology of thallus in Canoparmelia texana, a lichen with wide distribution in open environments and fairly common in the cerrados and urban areas of Brazil. This study describes a new type of cortical organization for the family Parmeliaceae, in C. texana the upper cortex is lacunar, showing a large quantity of small intercellular spaces or lacunae. The anatomical features including medulla thickness, hyphal orientation pattern, rhizines thickness and crystals inclusions have an important adaptive role for the success of C. texana in Brazilian cerrado, a savanna-like ecosystem.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomy; Crystals; Lacunar upper cortex; Parmeliaceae.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000300016
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