Seed germination of Agave species as influenced by substrate water potential

BACKGROUND: Plants of Agave spp. perform Crassulacean acid metabolism (CAM) and are highly drought-tolerant, but little is known concerning seed germination under low water availability. The aim of this study was to assess the effect of substrate water potential (ΨW) on seed germination and...

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Autores principales:	Ramírez-Tobías,Hugo M, Peña-Valdivia,Cecilia B, Trejo,Carlos, R,J Rogelio Aguirre, Humberto Vaquera,H
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2014
Materias:	Base water potential CAM Drought Germination Hydrotime model Maguey
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100011
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spelling	oai:scielo:S0716-976020140001000112015-10-30Seed germination of Agave species as influenced by substrate water potentialRamírez-Tobías,Hugo MPeña-Valdivia,Cecilia BTrejo,CarlosR,J Rogelio AguirreHumberto Vaquera,H Base water potential CAM Drought Germination Hydrotime model Maguey BACKGROUND: Plants of Agave spp. perform Crassulacean acid metabolism (CAM) and are highly drought-tolerant, but little is known concerning seed germination under low water availability. The aim of this study was to assess the effect of substrate water potential (ΨW) on seed germination and contrast hydrotime parameters of seven valuable and commercially-important Agave species from different geographical distributions and climatic regions of Mexico. Our hypothesis was that seed germination of Agave species is not affected by low water availability independently of seed biomass and the climate of their distribution area. RESULTS: Seed germination (at 25°C and in the dark) between 85 and 100% for all species occurred within 80 - 180 h at -0.03 MPa and 250 - 430 h at -1.0 MPa. Seed germination at -1.5 MPa declined to less than 50% (p < 0.05) for A. asperrima and A. cupreata but did not change significantly for A. americana var. marginata, A. lechuguilla and A. striata, although they showed the lowest mean base water potential (-2.01 to -2.64 MPa). Seed germination of 40% Agave species, from arid and semi-arid climates in this study, was not affected by the lower ΨW. CONCLUSION: Germination of seeds of Agave species is moderately affected by low water availability, is partially dependent of their ecological distribution, and is independent of seed mass.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.47 20142014-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100011en10.1186/0717-6287-47-11
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Base water potential CAM Drought Germination Hydrotime model Maguey
spellingShingle	Base water potential CAM Drought Germination Hydrotime model Maguey Ramírez-Tobías,Hugo M Peña-Valdivia,Cecilia B Trejo,Carlos R,J Rogelio Aguirre Humberto Vaquera,H Seed germination of Agave species as influenced by substrate water potential
description	BACKGROUND: Plants of Agave spp. perform Crassulacean acid metabolism (CAM) and are highly drought-tolerant, but little is known concerning seed germination under low water availability. The aim of this study was to assess the effect of substrate water potential (ΨW) on seed germination and contrast hydrotime parameters of seven valuable and commercially-important Agave species from different geographical distributions and climatic regions of Mexico. Our hypothesis was that seed germination of Agave species is not affected by low water availability independently of seed biomass and the climate of their distribution area. RESULTS: Seed germination (at 25°C and in the dark) between 85 and 100% for all species occurred within 80 - 180 h at -0.03 MPa and 250 - 430 h at -1.0 MPa. Seed germination at -1.5 MPa declined to less than 50% (p < 0.05) for A. asperrima and A. cupreata but did not change significantly for A. americana var. marginata, A. lechuguilla and A. striata, although they showed the lowest mean base water potential (-2.01 to -2.64 MPa). Seed germination of 40% Agave species, from arid and semi-arid climates in this study, was not affected by the lower ΨW. CONCLUSION: Germination of seeds of Agave species is moderately affected by low water availability, is partially dependent of their ecological distribution, and is independent of seed mass.
author	Ramírez-Tobías,Hugo M Peña-Valdivia,Cecilia B Trejo,Carlos R,J Rogelio Aguirre Humberto Vaquera,H
author_facet	Ramírez-Tobías,Hugo M Peña-Valdivia,Cecilia B Trejo,Carlos R,J Rogelio Aguirre Humberto Vaquera,H
author_sort	Ramírez-Tobías,Hugo M
title	Seed germination of Agave species as influenced by substrate water potential
title_short	Seed germination of Agave species as influenced by substrate water potential
title_full	Seed germination of Agave species as influenced by substrate water potential
title_fullStr	Seed germination of Agave species as influenced by substrate water potential
title_full_unstemmed	Seed germination of Agave species as influenced by substrate water potential
title_sort	seed germination of agave species as influenced by substrate water potential
publisher	Sociedad de Biología de Chile
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100011
work_keys_str_mv	AT ramireztobiashugom seedgerminationofagavespeciesasinfluencedbysubstratewaterpotential AT penavaldiviaceciliab seedgerminationofagavespeciesasinfluencedbysubstratewaterpotential AT trejocarlos seedgerminationofagavespeciesasinfluencedbysubstratewaterpotential AT rjrogelioaguirre seedgerminationofagavespeciesasinfluencedbysubstratewaterpotential AT humbertovaquerah seedgerminationofagavespeciesasinfluencedbysubstratewaterpotential
_version_	1718441512112488448

Seed germination of Agave species as influenced by substrate water potential

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