Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)

ABSTRACT The Chilean endemic genus Conanthera is comprised of five species of herbaceous cormous geophytes. They have ornamental value due to their bell-shaped flowers, which are blue, violet or white. Previous germination studies of Conanthera campanulata and Conanthera trimaculata were carried out...

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Autores principales:	Cuadra,Carlos De la, Vidal,Alexis K., Lagomarsino,Felipe, Peñaloza,Patricia, Mansur,Leví M., Huenchuleo,Carlos
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2019
Materias:	Conanthera campanulata Conanthera trimaculata germination temperature imbibition scarification seed dormancy
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000200323
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spelling	oai:scielo:S0718-583920190002003232019-05-14Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)Cuadra,Carlos De laVidal,Alexis K.Lagomarsino,FelipePeñaloza,PatriciaMansur,Leví M.Huenchuleo,Carlos Conanthera campanulata Conanthera trimaculata germination temperature imbibition scarification seed dormancy ABSTRACT The Chilean endemic genus Conanthera is comprised of five species of herbaceous cormous geophytes. They have ornamental value due to their bell-shaped flowers, which are blue, violet or white. Previous germination studies of Conanthera campanulata and Conanthera trimaculata were carried out at 22 °C, and manual mechanical scarification improved germination. Based on these results, it was suggested that physical dormancy is present in the non-scarified seeds. However, an improvement in germination after scarification is not enough evidence to conclude that the seed is non-permeable to water and thus has physical dormancy. The objective of the present study was to assess the testa water permeability via an imbibition test and to identify the optimum germination temperature in C. campanulata and C. trimaculata. Using 6-mo-old seeds, data from the imbibition tests showed that neither the seeds of C. campanulata nor C. trimaculata have physical dormancy. In the germination experiments, the temperature range for achieving high germination percentages was 10 to 15 °C, where germination reached 90% in less than 28 d. Temperature of 20 °C can be considered supra-optimal, while 5 and 25 °C inhibited germination. Manual mechanical scarification did not affect germination results at the range of 10 to 15 °C. However, at the supra-optimal temperature of 20 °C manual mechanical scarification increased germination, although levels were never higher than 25%.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.79 n.2 20192019-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000200323en10.4067/S0718-58392019000200323
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Conanthera campanulata Conanthera trimaculata germination temperature imbibition scarification seed dormancy
spellingShingle	Conanthera campanulata Conanthera trimaculata germination temperature imbibition scarification seed dormancy Cuadra,Carlos De la Vidal,Alexis K. Lagomarsino,Felipe Peñaloza,Patricia Mansur,Leví M. Huenchuleo,Carlos Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)
description	ABSTRACT The Chilean endemic genus Conanthera is comprised of five species of herbaceous cormous geophytes. They have ornamental value due to their bell-shaped flowers, which are blue, violet or white. Previous germination studies of Conanthera campanulata and Conanthera trimaculata were carried out at 22 °C, and manual mechanical scarification improved germination. Based on these results, it was suggested that physical dormancy is present in the non-scarified seeds. However, an improvement in germination after scarification is not enough evidence to conclude that the seed is non-permeable to water and thus has physical dormancy. The objective of the present study was to assess the testa water permeability via an imbibition test and to identify the optimum germination temperature in C. campanulata and C. trimaculata. Using 6-mo-old seeds, data from the imbibition tests showed that neither the seeds of C. campanulata nor C. trimaculata have physical dormancy. In the germination experiments, the temperature range for achieving high germination percentages was 10 to 15 °C, where germination reached 90% in less than 28 d. Temperature of 20 °C can be considered supra-optimal, while 5 and 25 °C inhibited germination. Manual mechanical scarification did not affect germination results at the range of 10 to 15 °C. However, at the supra-optimal temperature of 20 °C manual mechanical scarification increased germination, although levels were never higher than 25%.
author	Cuadra,Carlos De la Vidal,Alexis K. Lagomarsino,Felipe Peñaloza,Patricia Mansur,Leví M. Huenchuleo,Carlos
author_facet	Cuadra,Carlos De la Vidal,Alexis K. Lagomarsino,Felipe Peñaloza,Patricia Mansur,Leví M. Huenchuleo,Carlos
author_sort	Cuadra,Carlos De la
title	Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)
title_short	Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)
title_full	Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)
title_fullStr	Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)
title_full_unstemmed	Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)
title_sort	effect of temperature and scarification on seed germination of conanthera spp. (tecophilaeaceae)
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000200323
work_keys_str_mv	AT cuadracarlosdela effectoftemperatureandscarificationonseedgerminationofconantheraspptecophilaeaceae AT vidalalexisk effectoftemperatureandscarificationonseedgerminationofconantheraspptecophilaeaceae AT lagomarsinofelipe effectoftemperatureandscarificationonseedgerminationofconantheraspptecophilaeaceae AT penalozapatricia effectoftemperatureandscarificationonseedgerminationofconantheraspptecophilaeaceae AT mansurlevim effectoftemperatureandscarificationonseedgerminationofconantheraspptecophilaeaceae AT huenchuleocarlos effectoftemperatureandscarificationonseedgerminationofconantheraspptecophilaeaceae
_version_	1714205389281558528

Effect of temperature and scarification on seed germination of Conanthera spp. (Tecophilaeaceae)

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