Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)

Lygodium Sw. is the only genus of the family Lygodiaceae, with around 25 to 40 species inhabiting mostly tropical regions worldwide. In Argentina two species develop; one of them, L. venustum, grows in the Northeast of the country. Some species of Lygodium are invasive whereas medicinal uses have be...

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Detalles Bibliográficos
Autores principales:	Bejar, Julieta, Luna, María Luján, Murace, Mónica Adriana
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2019
Materias:	Botánica Biología Pathogenic fungus Ferns Gametophyte Leaf spots Argentina
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/105092
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-105092
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Botánica Biología Pathogenic fungus Ferns Gametophyte Leaf spots Argentina
spellingShingle	Botánica Biología Pathogenic fungus Ferns Gametophyte Leaf spots Argentina Bejar, Julieta Luna, María Luján Murace, Mónica Adriana Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)
topic_facet	Botánica Biología Pathogenic fungus Ferns Gametophyte Leaf spots Argentina
description	Lygodium Sw. is the only genus of the family Lygodiaceae, with around 25 to 40 species inhabiting mostly tropical regions worldwide. In Argentina two species develop; one of them, L. venustum, grows in the Northeast of the country. Some species of Lygodium are invasive whereas medicinal uses have been reported for some taxa. As part of a project to ascertain on the reproductive biology of native ferns in Argentina, a fungus was found during in vitro spore culture of L. venustum. Dark brown spots and eruptive pustules were also observed in fertile leaves. Thus, emerged as objectives of this work: 1) to retrieve and identify the fungus from the sporophyte and from the spores cultures, 2) to inquire on the impact of the fungus on gametophyte generation, and 3) to perform experiments with untreated spores to demonstrate that the fungus is associated to the spores collected from infested sporophytes. Phytopathological techniques were applied in order to isolate the fungus and then to achieve monosporic cultures. The morpho-biometric features of the conidia corresponded with those of Pestalotiopsis maculans (Corda) Nag Raj [= Pestalotiopsis guepinii (Desm.) Steyaert] (Amphisphaeriales, Ascomycota). Re-inoculation of conidia on healthy gametophytes conducted to their necrosis and death. The percentages of spore germination were initially higher in unsterilized cultures, suggesting that disinfection protocol may have affected spore germination. This is the first report of Pestalotiopsis maculans on the sporophytes of Lygodium venustum. The information that emerges from our work could be useful for the biocontrol of other species of Lygodium, considered weeds in other regions of the world.
format	Articulo Articulo
author	Bejar, Julieta Luna, María Luján Murace, Mónica Adriana
author_facet	Bejar, Julieta Luna, María Luján Murace, Mónica Adriana
author_sort	Bejar, Julieta
title	Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)
title_short	Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)
title_full	Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)
title_fullStr	Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)
title_full_unstemmed	Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)
title_sort	effects of the fungus pestalotiopsis maculans (ascomycota: amphisphaeriales) on the gametophytic development of the fern lygodium venustum (lygodiaceae)
publishDate	2019
url	http://sedici.unlp.edu.ar/handle/10915/105092
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bdutipo_str	Repositorios
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Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)

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