Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species

Abstract Background: Density in inter and intraspecific plant-plant interactions affects the action modes of allelopathy (autotoxicity, negative and positive allelopathy). Some seeds exude compounds that inhibit the germination of others. Ipomoea murucoides and I. pauciflora are sympatric tree spec...

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Autores principales:	Aguilar-Franco,Zoila Mercedes, Flores-Palacios,Alejandro, Flores-Morales,Alejandro, Perea-Arango,Irene, Arellano-García,José de Jesús, Valencia-Díaz,Susana
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2019
Materias:	Autotoxicity Chemical interference Facilitation Replacement series experiment Resource competition Tropical dry forest
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2019000100206
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spelling	oai:scielo:S0716-078X20190001002062019-10-10Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea speciesAguilar-Franco,Zoila MercedesFlores-Palacios,AlejandroFlores-Morales,AlejandroPerea-Arango,IreneArellano-García,José de JesúsValencia-Díaz,Susana Autotoxicity Chemical interference Facilitation Replacement series experiment Resource competition Tropical dry forest Abstract Background: Density in inter and intraspecific plant-plant interactions affects the action modes of allelopathy (autotoxicity, negative and positive allelopathy). Some seeds exude compounds that inhibit the germination of others. Ipomoea murucoides and I. pauciflora are sympatric tree species that form patches at the local scale where one or the other dominates, possibly due to allelopathy in the seeds. The objective of this study was to determine the possible density-dependence of the allelopathic effect among seeds of these species through the measure of seed germination and seedling emergence. Methods: In both species, allelopathy was measured as: a) germination in mixed sowing of both species at different proportions, b) germination in single-species trials at different densities after adding seed extracts of both species, and c) seedling emergence in seed mixtures of both species sown at different proportions beneath canopies of the two Ipomoea species. Results: Seed germination of I. murucoides was increased by the presence of I. pauciflora and diminished at higher densities of its own seeds; however, seed germination of I. pauciflora was not affected by the presence of I. murucoides seeds. The addition of extracts (either from conspecifics or congeneric) diminished the germination of both species and at higher seed densities the germination was lower. Seedling emergence did not depend on the species under which the seeds were sown nor on the density of the seeds. Conclusions: The germination experiments evidenced positive allelopathy and/or autotoxicity, while there was no evidence of allelopathic effects in seedling emergence. The allelopathic activity is reported in the seeds of these species for the first time.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.92 20192019-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2019000100206en10.1186/s40693-019-0087-z
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Autotoxicity Chemical interference Facilitation Replacement series experiment Resource competition Tropical dry forest
spellingShingle	Autotoxicity Chemical interference Facilitation Replacement series experiment Resource competition Tropical dry forest Aguilar-Franco,Zoila Mercedes Flores-Palacios,Alejandro Flores-Morales,Alejandro Perea-Arango,Irene Arellano-García,José de Jesús Valencia-Díaz,Susana Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species
description	Abstract Background: Density in inter and intraspecific plant-plant interactions affects the action modes of allelopathy (autotoxicity, negative and positive allelopathy). Some seeds exude compounds that inhibit the germination of others. Ipomoea murucoides and I. pauciflora are sympatric tree species that form patches at the local scale where one or the other dominates, possibly due to allelopathy in the seeds. The objective of this study was to determine the possible density-dependence of the allelopathic effect among seeds of these species through the measure of seed germination and seedling emergence. Methods: In both species, allelopathy was measured as: a) germination in mixed sowing of both species at different proportions, b) germination in single-species trials at different densities after adding seed extracts of both species, and c) seedling emergence in seed mixtures of both species sown at different proportions beneath canopies of the two Ipomoea species. Results: Seed germination of I. murucoides was increased by the presence of I. pauciflora and diminished at higher densities of its own seeds; however, seed germination of I. pauciflora was not affected by the presence of I. murucoides seeds. The addition of extracts (either from conspecifics or congeneric) diminished the germination of both species and at higher seed densities the germination was lower. Seedling emergence did not depend on the species under which the seeds were sown nor on the density of the seeds. Conclusions: The germination experiments evidenced positive allelopathy and/or autotoxicity, while there was no evidence of allelopathic effects in seedling emergence. The allelopathic activity is reported in the seeds of these species for the first time.
author	Aguilar-Franco,Zoila Mercedes Flores-Palacios,Alejandro Flores-Morales,Alejandro Perea-Arango,Irene Arellano-García,José de Jesús Valencia-Díaz,Susana
author_facet	Aguilar-Franco,Zoila Mercedes Flores-Palacios,Alejandro Flores-Morales,Alejandro Perea-Arango,Irene Arellano-García,José de Jesús Valencia-Díaz,Susana
author_sort	Aguilar-Franco,Zoila Mercedes
title	Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species
title_short	Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species
title_full	Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species
title_fullStr	Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species
title_full_unstemmed	Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species
title_sort	density-dependent effect of allelopathy on germination and seedling emergence in two ipomoea species
publisher	Sociedad de Biología de Chile
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2019000100206
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Density-dependent effect of allelopathy on germination and seedling emergence in two Ipomoea species

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