Thallus structure and isidium development in two Parmeliaceae species (lichenized Ascomycota)
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
---|---|
Data(s) |
20/05/2014
20/05/2014
01/07/2009
|
Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Processo FAPESP: 00/12469-3 (Thallus structure and isidium development in two Parmeliaceae species (lichenized Ascomycota)). Conventional techniques for structural studies under light microscope and scanning electron microscope were employed to describe and compare the histology of thallus and isidia development in Parmotrema tinctorum and Parmelinopsis minarum. Although presenting layers typical of the heteromerous structure of Parmeliaceae lichens, the studied species have very distinct anatomical details including: the type of upper cortex, medulla thickness, hyphal orientation pattern and distinct strata in this layer, variations of crystal shape, color, location and degree of association with medullary hyphae, rhizines thickness and covering by a cortical layer. Isidium formation starts with cortical cell proliferation, which results in a small protuberance on the thallus surface, followed by the photobiont cell proliferation. Medullary hyphal intrusions occur only after the formation of this protuberance. In this stage medullary hyphae grow, ramifying or not inside the protuberance. In a posterior stage, the isidium base becomes constricted, which facilitates its detachment from the thallus. (C) 2009 Elsevier Ltd. All rights reserved. |
Formato |
536-542 |
Identificador |
http://dx.doi.org/10.1016/j.micron.2009.04.004 Micron. Oxford: Pergamon-Elsevier B.V. Ltd, v. 40, n. 5-6, p. 536-542, 2009. 0968-4328 http://hdl.handle.net/11449/17321 10.1016/j.micron.2009.04.004 WOS:000267515800004 |
Idioma(s) |
eng |
Publicador |
Pergamon-Elsevier B.V. Ltd |
Relação |
Micron |
Direitos |
closedAccess |
Palavras-Chave | #Anatomy #Isidia #Ontogeny #Parmotrema tinctorum #Parmelinopsis minarum |
Tipo |
info:eu-repo/semantics/article |