Structure and chemistry of the xylem of arborescent species of Blechnum from South America

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The xylem in three arborescent species of Blechnum section Lomariocycas was studied in detail using SEM, TEM, FT-IR spectroscopy and sugar composition analysis. The overall structure of root and rhizome metaxylem tracheids was similar in the three species analyzed, and characterized by mostly scalar...

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Autores principales:	Luna, María Luján, Ramos Giacosa, Juan Pablo, Giudice, Gabriela Elena, Fernández, Paula Virginia, Ciancia, Marina, Saparrat, Mario Carlos Nazareno
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2015
Materias:	Ciencias Naturales Arborescent ferns tracheids (pseudo)vestured pits torus-like structures transfer-cells G-lignin xyloglucans
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/134561
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-134561
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales Arborescent ferns tracheids (pseudo)vestured pits torus-like structures transfer-cells G-lignin xyloglucans
spellingShingle	Ciencias Naturales Arborescent ferns tracheids (pseudo)vestured pits torus-like structures transfer-cells G-lignin xyloglucans Luna, María Luján Ramos Giacosa, Juan Pablo Giudice, Gabriela Elena Fernández, Paula Virginia Ciancia, Marina Saparrat, Mario Carlos Nazareno Structure and chemistry of the xylem of arborescent species of Blechnum from South America
topic_facet	Ciencias Naturales Arborescent ferns tracheids (pseudo)vestured pits torus-like structures transfer-cells G-lignin xyloglucans
description	The xylem in three arborescent species of Blechnum section Lomariocycas was studied in detail using SEM, TEM, FT-IR spectroscopy and sugar composition analysis. The overall structure of root and rhizome metaxylem tracheids was similar in the three species analyzed, and characterized by mostly scalariform pitting of these multifaceted cells. Pit membrane thickness and porosity varied according to the stage of tracheid maturation. Approximately rounded deposits resembling vestures were observed in the outer pit apertures of some tracheids. Under TEM, thickenings like one-sided tori appeared on the tracheid side of tracheid-to-parenchyma contact walls; some parenchyma cells showed, in addition, features of transfer cells. As the increase in stature creates new constraints in terms of biomechanical support and water transport in plants, the characteristics found in Blechnum xylem might be related to optimization of conductive efficiency and safety. Chemical analyses of roots and rhizomes of B. yungense revealed similar levels of G-type lignin deposited in the xylem cell walls. Such lignin is the most common in ferns, including other arborescent genera. Preliminary analysis of cell wall polysaccharide composition of both root and rhizome xylem, yielded cellulose, xyloglucans and xylans with low amounts of mannans and pectins. The xylem of rhizomes had higher amounts of cellulose than root xylem. Our results are discussed in the context of functional and evolutionary aspects of xylem ferns.
format	Articulo Articulo
author	Luna, María Luján Ramos Giacosa, Juan Pablo Giudice, Gabriela Elena Fernández, Paula Virginia Ciancia, Marina Saparrat, Mario Carlos Nazareno
author_facet	Luna, María Luján Ramos Giacosa, Juan Pablo Giudice, Gabriela Elena Fernández, Paula Virginia Ciancia, Marina Saparrat, Mario Carlos Nazareno
author_sort	Luna, María Luján
title	Structure and chemistry of the xylem of arborescent species of Blechnum from South America
title_short	Structure and chemistry of the xylem of arborescent species of Blechnum from South America
title_full	Structure and chemistry of the xylem of arborescent species of Blechnum from South America
title_fullStr	Structure and chemistry of the xylem of arborescent species of Blechnum from South America
title_full_unstemmed	Structure and chemistry of the xylem of arborescent species of Blechnum from South America
title_sort	structure and chemistry of the xylem of arborescent species of blechnum from south america
publishDate	2015
url	http://sedici.unlp.edu.ar/handle/10915/134561
work_keys_str_mv	AT lunamarialujan structureandchemistryofthexylemofarborescentspeciesofblechnumfromsouthamerica AT ramosgiacosajuanpablo structureandchemistryofthexylemofarborescentspeciesofblechnumfromsouthamerica AT giudicegabrielaelena structureandchemistryofthexylemofarborescentspeciesofblechnumfromsouthamerica AT fernandezpaulavirginia structureandchemistryofthexylemofarborescentspeciesofblechnumfromsouthamerica AT cianciamarina structureandchemistryofthexylemofarborescentspeciesofblechnumfromsouthamerica AT saparratmariocarlosnazareno structureandchemistryofthexylemofarborescentspeciesofblechnumfromsouthamerica
bdutipo_str	Repositorios
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Structure and chemistry of the xylem of arborescent species of Blechnum from South America

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