Effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)

Abstract: Common teasel is an invasive and widespread weed in Argentina. Germination experiments were carried out from 2011 to 2014 to determine the effect of various environmental factors on germination and emergence. Germination of recently dispersed seeds was 12% in darkness at constant temperatu...

Descripción completa

Detalles Bibliográficos
Autores principales: Huarte, Héctor Roberto, Pereyra Zorraquín, María del Rosario, Bursztyn, Eric Michel, Zapiola, María Luz
Formato: Artículo
Lenguaje:Inglés
Publicado: Weed Science Society of America, Cambridge University Press 2022
Materias:
DIPSACUS FULLONUM
CARDO COMÚN
GERMINACION
LUZ
LATENCIA FISIOLÓGICA
Acceso en línea:https://repositorio.uca.edu.ar/handle/123456789/15520
Aporte de:
Repositorio Institucional de la Universidad Católica Argentina (UCA) de Universidad Católica Argentina
id I33-R139-123456789-15520
record_format dspace
institution Universidad Católica Argentina
institution_str I-33
repository_str R-139
collection Repositorio Institucional de la Universidad Católica Argentina (UCA)
language Inglés
topic DIPSACUS FULLONUM
CARDO COMÚN
GERMINACION
LUZ
LATENCIA FISIOLÓGICA
spellingShingle DIPSACUS FULLONUM
CARDO COMÚN
GERMINACION
LUZ
LATENCIA FISIOLÓGICA
Huarte, Héctor Roberto
Pereyra Zorraquín, María del Rosario
Bursztyn, Eric Michel
Zapiola, María Luz
Effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)
topic_facet DIPSACUS FULLONUM
CARDO COMÚN
GERMINACION
LUZ
LATENCIA FISIOLÓGICA
description Abstract: Common teasel is an invasive and widespread weed in Argentina. Germination experiments were carried out from 2011 to 2014 to determine the effect of various environmental factors on germination and emergence. Germination of recently dispersed seeds was 12% in darkness at constant temperature. In contrast, seed exposure to light and alternating temperatures enhancedgermination to 95%. The requirement of light and alternating temperatures suggest that common teasel has physiological dormancy. Several experiments were carried out to determine whether (1) seed responses to light and alternating temperatures have a hormonal basis, (2) seed coats can suppress germination, and (3) time and thermal conditions during seed storage reduce light andalternating temperature requirements. Germination was reduced ( 13%) by a gibberellin synthesis inhibitor. In contrast, the presence of gibberellins and an abscisic acid synthesis inhibitor increased germination to 95 and 38%, respectively. Results suggest that a higher ratio among gibberellins andabscisic acid (GA/ABA) leads to a break in dormancy. Germination was 100% when embryos were excised, suggesting that seed coats may suppress germination by mechanical restriction. Likewise,germination was enhanced by hydrogen peroxide (70%). This compound is known to increase GA/ABA ratio in agreement with a hormonal control of dormancy proposed for common teasel. An increment of storage time reduces light and alternating temperature requirements, allowing seeds togerminate in darkness. Taking these results together confirms that common teasel has physiological dormancy. Seedling emergence was progressively reduced from 70 to 8% by increased burial depth from 0 to 3 cm. Information from these experiments may facilitate development of effective management for common teasel.
format Artículo
author Huarte, Héctor Roberto
Pereyra Zorraquín, María del Rosario
Bursztyn, Eric Michel
Zapiola, María Luz
author_facet Huarte, Héctor Roberto
Pereyra Zorraquín, María del Rosario
Bursztyn, Eric Michel
Zapiola, María Luz
author_sort Huarte, Héctor Roberto
title Effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)
title_short Effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)
title_full Effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)
title_fullStr Effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)
title_full_unstemmed Effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)
title_sort effects of environmental factors on seed germination and seedling emergence of common teasel (dipsacus fullonum)
publisher Weed Science Society of America, Cambridge University Press
publishDate 2022
url https://repositorio.uca.edu.ar/handle/123456789/15520
work_keys_str_mv AT huartehectorroberto effectsofenvironmentalfactorsonseedgerminationandseedlingemergenceofcommonteaseldipsacusfullonum
AT pereyrazorraquinmariadelrosario effectsofenvironmentalfactorsonseedgerminationandseedlingemergenceofcommonteaseldipsacusfullonum
AT bursztynericmichel effectsofenvironmentalfactorsonseedgerminationandseedlingemergenceofcommonteaseldipsacusfullonum
AT zapiolamarialuz effectsofenvironmentalfactorsonseedgerminationandseedlingemergenceofcommonteaseldipsacusfullonum
bdutipo_str Repositorios
_version_ 1764820523869536256

Ejemplares similares