Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile

The extent to which plants depend on pollinators for outcross pollen transportation is a key issue in plant reproductive ecology. We evaluated the putative breeding system, foral display, and natural pollination in two Southern Cone of South American orchids, Gavilea araucana and G. venosa, by perfo...

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Autores principales:	Valdivia,Carlos E, Cisternas,Mauricio A, Verdugo,Gabriela S
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2010
Materias:	Autogamy allogamy self-compatibility foral display fruiting patterns
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432010000100005
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spelling	oai:scielo:S0717-664320100001000052010-08-12Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central ChileValdivia,Carlos ECisternas,Mauricio AVerdugo,Gabriela S Autogamy allogamy self-compatibility foral display fruiting patterns The extent to which plants depend on pollinators for outcross pollen transportation is a key issue in plant reproductive ecology. We evaluated the putative breeding system, foral display, and natural pollination in two Southern Cone of South American orchids, Gavilea araucana and G. venosa, by performing four hand pollination trials (agamospermy, autogamy, geitonogamy, and xenogamy tests) and by counting each fower and fruit produced by plants in natural conditions. Fruit set differed signifcantly depending on the origin of pollen as well as on the presence of a pollen vector. None of these species produced fruits by the agamospermy tests, therefore indicating that they require the presence of pollen on the stigmas for fruit setting. By contrast, only G. araucana was capable of fruit setting following the autogamy test, therefore demostrating that this orchid needs not depend on pollinators for fruit set. Furthermore, G. araucana and G. venosa produced 100% fruits by geitonogamy and by xenogamy, thereby indicating that both plants are totally self-compatible. The mean number of fowers per plant was 2.1 times higher in G. venosa with respect to G. araucana; however, natural fruiting success was 28.8% and 98.9%, respectively. Furthermore, while the increase in fruiting success signifcantly and positively correlated with an increase in foral display in G. araucana, in G. venosa these variables were unrelated. Certainly, further studies concerning the reproductive strategies in orchids of southern South America are of great importance.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana. Botánica v.67 n.1 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432010000100005en10.4067/S0717-66432010000100005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Autogamy allogamy self-compatibility foral display fruiting patterns
spellingShingle	Autogamy allogamy self-compatibility foral display fruiting patterns Valdivia,Carlos E Cisternas,Mauricio A Verdugo,Gabriela S Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile
description	The extent to which plants depend on pollinators for outcross pollen transportation is a key issue in plant reproductive ecology. We evaluated the putative breeding system, foral display, and natural pollination in two Southern Cone of South American orchids, Gavilea araucana and G. venosa, by performing four hand pollination trials (agamospermy, autogamy, geitonogamy, and xenogamy tests) and by counting each fower and fruit produced by plants in natural conditions. Fruit set differed signifcantly depending on the origin of pollen as well as on the presence of a pollen vector. None of these species produced fruits by the agamospermy tests, therefore indicating that they require the presence of pollen on the stigmas for fruit setting. By contrast, only G. araucana was capable of fruit setting following the autogamy test, therefore demostrating that this orchid needs not depend on pollinators for fruit set. Furthermore, G. araucana and G. venosa produced 100% fruits by geitonogamy and by xenogamy, thereby indicating that both plants are totally self-compatible. The mean number of fowers per plant was 2.1 times higher in G. venosa with respect to G. araucana; however, natural fruiting success was 28.8% and 98.9%, respectively. Furthermore, while the increase in fruiting success signifcantly and positively correlated with an increase in foral display in G. araucana, in G. venosa these variables were unrelated. Certainly, further studies concerning the reproductive strategies in orchids of southern South America are of great importance.
author	Valdivia,Carlos E Cisternas,Mauricio A Verdugo,Gabriela S
author_facet	Valdivia,Carlos E Cisternas,Mauricio A Verdugo,Gabriela S
author_sort	Valdivia,Carlos E
title	Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile
title_short	Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile
title_full	Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile
title_fullStr	Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile
title_full_unstemmed	Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile
title_sort	reproductive biology aspects of two species of the genus gavilea (orchidaceae, chloraeinae) in populations from central chile
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432010000100005
work_keys_str_mv	AT valdiviacarlose reproductivebiologyaspectsoftwospeciesofthegenusgavileaorchidaceaechloraeinaeinpopulationsfromcentralchile AT cisternasmauricioa reproductivebiologyaspectsoftwospeciesofthegenusgavileaorchidaceaechloraeinaeinpopulationsfromcentralchile AT verdugogabrielas reproductivebiologyaspectsoftwospeciesofthegenusgavileaorchidaceaechloraeinaeinpopulationsfromcentralchile
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Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile

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