Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set

Reproduction of Triumfetta semitriloba Jacq. (Tiliaceae), a facultatively autogamous tropical shrub weed, was studied in tbree patches of different habitat "quality", in Vicosa, Southeastern Brazil. In each patch ten plants were randomly chosen to collect 25 fruits per plant, during each f...

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Autores principales:	Collevatti, Rosane G, Lopes, Frederico S, C. Amaral, Maria Eugenia
Formato:	Online
Idioma:	eng
Publicado:	Universidad de Costa Rica 1997
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/rbt/article/view/21444

id	RBT21444
record_format	ojs
spelling	RBT214442022-05-25T20:50:39Z Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set Collevatti, Rosane G Lopes, Frederico S C. Amaral, Maria Eugenia Reproduction of Triumfetta semitriloba Jacq. (Tiliaceae), a facultatively autogamous tropical shrub weed, was studied in tbree patches of different habitat "quality", in Vi Reproduction of Triumfetta semitriloba Jacq. (Tiliaceae), a facultatively autogamous tropical shrub weed, was studied in tbree patches of different habitat "quality", in Vicosa, Southeastern Brazil. In each patch ten plants were randomly chosen to collect 25 fruits per plant, during each flowc::ring month (March, April and May) in 1994. Mean seed initiation and seed set, pooling all patches,and flowering months were.2.535 (sd=O.l45) and 1.487 (sd=o.102), respectively (maximum: six seeds per fruit). Mean seed abortion was 41.3%. There was a higher number pf initiated seeds per fruit in one patch, probably caused by differences in patch "quality" and pollinátor abundance, and not by spatial differences on seed abortion, which was not different among patches. Two patches had the same temporal variation (among flowering months) in seed seto The greater brood size during the first and last months was caused by a higher seed initiation on the first flowering month and bigher proportipn of seed abortion on the second month. On the second month there were more flowersJl,er plant, which my lead to a lower rate of cross-polJination and, consequently, lower seed set. The differing patchhad a greater brood size during the first and second months. This pattern could be a . result of a higher seed initiation 'on the first flowering month, or of other patch charíÍcteristics such as lower number of flowers per plant, or lower abundallce of pollinators, especially during the last month, and a high rate of flower predation by beetle species, but not by differencés in seed abortion among months. Universidad de Costa Rica 1997-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/21444 Revista de Biología Tropical; Vol. 45 No. 4 (1997): Volume 45 – Regular number 4 – December 1997; 1395–1399 Revista de Biología Tropical; Vol. 45 Núm. 4 (1997): Volumen 45 – Volumen regular 4 – Diciembre 1997; 1395–1399 Revista Biología Tropical; Vol. 45 N.º 4 (1997): Volume 45 – Regular number 4 – December 1997; 1395–1399 2215-2075 0034-7744 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/21444/21660 Copyright (c) 1997 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
institution	Universidad de Costa Rica
collection	Revista de Biología Tropical
language	eng
format	Online
author	Collevatti, Rosane G Lopes, Frederico S C. Amaral, Maria Eugenia
spellingShingle	Collevatti, Rosane G Lopes, Frederico S C. Amaral, Maria Eugenia Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set
author_facet	Collevatti, Rosane G Lopes, Frederico S C. Amaral, Maria Eugenia
author_sort	Collevatti, Rosane G
description	Reproduction of Triumfetta semitriloba Jacq. (Tiliaceae), a facultatively autogamous tropical shrub weed, was studied in tbree patches of different habitat "quality", in Vicosa, Southeastern Brazil. In each patch ten plants were randomly chosen to collect 25 fruits per plant, during each flowc::ring month (March, April and May) in 1994. Mean seed initiation and seed set, pooling all patches,and flowering months were.2.535 (sd=O.l45) and 1.487 (sd=o.102), respectively (maximum: six seeds per fruit). Mean seed abortion was 41.3%. There was a higher number pf initiated seeds per fruit in one patch, probably caused by differences in patch "quality" and pollinátor abundance, and not by spatial differences on seed abortion, which was not different among patches. Two patches had the same temporal variation (among flowering months) in seed seto The greater brood size during the first and last months was caused by a higher seed initiation on the first flowering month and bigher proportipn of seed abortion on the second month. On the second month there were more flowersJl,er plant, which my lead to a lower rate of cross-polJination and, consequently, lower seed set. The differing patchhad a greater brood size during the first and second months. This pattern could be a . result of a higher seed initiation 'on the first flowering month, or of other patch charíÍcteristics such as lower number of flowers per plant, or lower abundallce of pollinators, especially during the last month, and a high rate of flower predation by beetle species, but not by differencés in seed abortion among months.
title	Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set
title_short	Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set
title_full	Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set
title_fullStr	Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set
title_full_unstemmed	Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set
title_sort	reproductive success in the tropical weed triumfetta semitriloba (tiliaceae): spatial and temporal variation in seed set
title_alt	Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set
publisher	Universidad de Costa Rica
publishDate	1997
url	https://revistas.ucr.ac.cr/index.php/rbt/article/view/21444
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Reproductive success in the tropical weed Triumfetta semitriloba (Tiliaceae): spatial and temporal variation in seed set

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