Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)

Protandry has been described in orchids since Darwin (1862) as a strategy to promote cross-pollination. Three different forms of protandry have been reported in tribe Cranichideae: downward movement of the labellum in Spiranthes species, upward movement of the column in Sauroglossum elatum Lindl. an...

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Autores principales:	Trujillo, Delsy, Franke, Thassilo, Agerer, Reinhard
Formato:	Online
Idioma:	spa
Publicado:	Universidad de Costa Rica 2011
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/18302

id	LANKESTERIANA18302
record_format	ojs
spelling	LANKESTERIANA183022022-07-20T01:12:58Z Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae) Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae) Trujillo, Delsy Franke, Thassilo Agerer, Reinhard Protandry has been described in orchids since Darwin (1862) as a strategy to promote cross-pollination. Three different forms of protandry have been reported in tribe Cranichideae: downward movement of the labellum in Spiranthes species, upward movement of the column in Sauroglossum elatum Lindl. and Manniella spp., and downward movement of the column in Prescottia stachyodes (Sw.) Lindl. In the present work, through longitudinal and transverse sections of flowers of different developmental stages, we reported column movement of Aa erosa (Rchb.f.) Schltr. and the mechanism responsible for the movement. Our result shows that in an early flower stage (male phase), the column of Aa erosa is straight. The gradual cell death of the dorsal side of the column and size increase of the cells of the ventral side cause the column to bend downward to almost 90o representing the female stage. Some authors have suggested self-pollination in Aa. But flies exploring inflorescences of Aa species have been observed in the field by the author. This observation plus the evidence of protandry in Aa erosa could discard self- pollination as the only strategy of pollination in this genus. Protandry has been described in orchids since Darwin (1862) as a strategy to promote cross-pollination. Three different forms of protandry have been reported in tribe Cranichideae: downward movement of the labellum in Spiranthes species, upward movement of the column in Sauroglossum elatum Lindl. and Manniella spp., and downward movement of the column in Prescottia stachyodes (Sw.) Lindl. In the present work, through longitudinal and transverse sections of flowers of different developmental stages, we reported column movement of Aa erosa (Rchb.f.) Schltr. and the mechanism responsible for the movement. Our result shows that in an early flower stage (male phase), the column of Aa erosa is straight. The gradual cell death of the dorsal side of the column and size increase of the cells of the ventral side cause the column to bend downward to almost 90o representing the female stage. Some authors have suggested self-pollination in Aa. But flies exploring inflorescences of Aa species have been observed in the field by the author. This observation plus the evidence of protandry in Aa erosa could discard self- pollination as the only strategy of pollination in this genus. Universidad de Costa Rica 2011-11-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/18302 10.15517/lank.v11i3.18302 Lankesteriana: International Journal on Orchidology; 2011: Lankesteriana: Volumen 11, Número 3 Lankesteriana: International Journal on Orchidology; 2011: Lankesteriana: Volumen 11, Número 3 2215-2067 1409-3871 spa https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/18302/18491
institution	Universidad de Costa Rica
collection	Lankesteriana: International Journal on Orchidology
language	spa
format	Online
author	Trujillo, Delsy Franke, Thassilo Agerer, Reinhard
spellingShingle	Trujillo, Delsy Franke, Thassilo Agerer, Reinhard Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)
author_facet	Trujillo, Delsy Franke, Thassilo Agerer, Reinhard
author_sort	Trujillo, Delsy
description	Protandry has been described in orchids since Darwin (1862) as a strategy to promote cross-pollination. Three different forms of protandry have been reported in tribe Cranichideae: downward movement of the labellum in Spiranthes species, upward movement of the column in Sauroglossum elatum Lindl. and Manniella spp., and downward movement of the column in Prescottia stachyodes (Sw.) Lindl. In the present work, through longitudinal and transverse sections of flowers of different developmental stages, we reported column movement of Aa erosa (Rchb.f.) Schltr. and the mechanism responsible for the movement. Our result shows that in an early flower stage (male phase), the column of Aa erosa is straight. The gradual cell death of the dorsal side of the column and size increase of the cells of the ventral side cause the column to bend downward to almost 90o representing the female stage. Some authors have suggested self-pollination in Aa. But flies exploring inflorescences of Aa species have been observed in the field by the author. This observation plus the evidence of protandry in Aa erosa could discard self- pollination as the only strategy of pollination in this genus.
title	Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)
title_short	Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)
title_full	Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)
title_fullStr	Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)
title_full_unstemmed	Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)
title_sort	evidence of protandry in aa rchb.f. (orchidaceae, cranichideae)
title_alt	Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)
publisher	Universidad de Costa Rica
publishDate	2011
url	https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/18302
work_keys_str_mv	AT trujillodelsy evidenceofprotandryinaarchbforchidaceaecranichideae AT frankethassilo evidenceofprotandryinaarchbforchidaceaecranichideae AT agererreinhard evidenceofprotandryinaarchbforchidaceaecranichideae
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Evidence of protandry in Aa Rchb.f. (Orchidaceae, Cranichideae)

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