NDLI: Nephopteris out of the clouds: Molecular evidence places the enigmatic N. maxonii (Pteridaceae) within the Jamesonia clade

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Nephopteris out of the clouds: Molecular evidence places the enigmatic N. maxonii (Pteridaceae) within the Jamesonia clade

Content Provider	Springer Nature Link
Author	Pabón Mora, Natalia González, Favio
Copyright Year	2015
Abstract	The monospecific fern genus Nephopteris is restricted to four páramos in Colombia. Until now, its phylogenetic relationships have not been clarified, although morphological traits suggest that it belongs to the taenitidoid clade of the subfamily Pteridoideae in the Pteridaceae. We isolated four chloroplast (atpA, chlL, rbcL, and rps4) loci of N. maxonii and performed maximum parsimony and maximum likelihood phylogenetic analyses, including a preliminary analysis based on rbcL of 424 accessions of leptosporangiate ferns. Then, we carried out separate and combined reconstructions for all four loci, focusing the sampling in the subfamily Pteridoideae (Pteridaceae). Our results show that Nephopteris belongs to the taenitidoid clade of the subfamily Pteridoideae and is nested in Jamesonia. Thus, the new combination Jamesonia maxonii is provided. Its dimorphic sterile and fertile leaves appear to be unique within the taenitidoids. Given that this species shares the same microhabitat with other Jamesonia species, it is unlikely that leaf shape evolution within the entire clade is a result of adaptive processes to páramo conditions.El género monoespecífico de helechos Nephopteris está restringido a cuatro páramos de Colombia. Hasta ahora, las relaciones filogenéticas del género no han sido precisadas, aunque los caracteres morfológicos sugieren que pertenece a la subfamilia Pteridoideae, de las Pteridaceae. Cuatro loci del cloroplasto (atpA, chlL, rbcL, and rps4) de N. maxonii fueron aislados y empleados para reconstruir la filogenia bajo Parsimonia y Máxima Verosimilitud, incluído un análisis preliminar basado en secuencias de rbcL de 424 muestras de helechos leptosporangiados. Enseguida, llevamos a cabo análisis separados para los cuatro loci, enfocando el muestreo en la subfamilia Pteridoideae (Pteridaceae). Nuestros resultados demuestran que Nephopteris pertenece al clado taenitidoide de la subfamilia Pteridoideae, anidado dentro de Jamesonia. Por lo tanto, proponemos la nueva combinación, Jamesonia maxonii. Las hojas dimórficas de J. maxonii son únicas dentro del clado de helechos taenitidoides. Debido a que esta especie crece en los mismos microhabitat junto a otras especies de Jamesonia, es improbable que la evolución foliar en el clado Jamesonia sea el resultado de procesos adaptativos frente a condiciones de páramo.
Starting Page	83
Ending Page	92
Page Count	10
File Format	PDF
ISSN	0007196X
Journal	Brittonia
Volume Number	68
Issue Number	1
e-ISSN	1938436X
Language	English
Publisher	Springer US
Publisher Date	2015-10-21
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fern leaf evolution fern phylogeny Jamesonia Nephopteris páramo endemism Pteridoideae taenitidoid ferns Plant Sciences Plant Systematics/Taxonomy/Biogeography Plant Anatomy/Development Plant Physiology Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Ecology, Evolution, Behavior and Systematics

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Nephopteris out of the clouds: Molecular evidence places the enigmatic N. maxonii (Pteridaceae) within the Jamesonia clade

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Nephopteris out of the clouds: Molecular evidence places the enigmatic N. maxonii (Pteridaceae) within the Jamesonia clade