How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?

Temperature determines plant formations and species distribution along altitudinal gradients. Plants in the tropical high Andes, through different physiological and morphological characteristics, respond to freezing night temperatures and high daytime energy inputs which occur anytime of the year. T...

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Autores principales:	RADA,FERMÍN, BRICEÑO,BENITO, AZÓCAR,AURA
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2008
Materias:	Lupinus meridanus Lupinus eromonomos frost avoidance freezing tolerance optimum temperature for photosynthesis
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300003
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spelling	oai:scielo:S0716-078X20080003000032009-04-24How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?RADA,FERMÍNBRICEÑO,BENITOAZÓCAR,AURA Lupinus meridanus Lupinus eromonomos frost avoidance freezing tolerance optimum temperature for photosynthesis Temperature determines plant formations and species distribution along altitudinal gradients. Plants in the tropical high Andes, through different physiological and morphological characteristics, respond to freezing night temperatures and high daytime energy inputs which occur anytime of the year. The main objective of this study was to characterize day and night temperature related responses of two Lupinus species with different altitudinal ranges (L. meridanus, 1,800-3,600 and L. eromonomos, 3,700-4,300 m of altitude). Are there differences in night low temperature resistance mechanisms between the species along the gradient? How do these species respond, in terms of optimum temperature for photosynthesis, to increasing altitude? Lupinus meridanus shows frost avoidance, in contrast to L. eromonomos, which tolerates freezing at higher altitudes. Optimum temperature for photosynthesis decreases along the gradient for both species. Maximum C0(2) assimilation rates were higher in L. meridanus, while L. eromonomos showed decreasing C0(2) assimilation rates at the higher altitude. In most cases, measured daily leaf temperature is always within the 80 % of optimum for photosynthesis. L. meridanus7 upper distribution limit seems to be restricted by cold resistance mechanisms, while L. eromonomos7 to a combination of both cold resistance and to C0(2) assimilation responses at higher altitudes.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.81 n.3 20082008-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300003en10.4067/S0716-078X2008000300003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Lupinus meridanus Lupinus eromonomos frost avoidance freezing tolerance optimum temperature for photosynthesis
spellingShingle	Lupinus meridanus Lupinus eromonomos frost avoidance freezing tolerance optimum temperature for photosynthesis RADA,FERMÍN BRICEÑO,BENITO AZÓCAR,AURA How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
description	Temperature determines plant formations and species distribution along altitudinal gradients. Plants in the tropical high Andes, through different physiological and morphological characteristics, respond to freezing night temperatures and high daytime energy inputs which occur anytime of the year. The main objective of this study was to characterize day and night temperature related responses of two Lupinus species with different altitudinal ranges (L. meridanus, 1,800-3,600 and L. eromonomos, 3,700-4,300 m of altitude). Are there differences in night low temperature resistance mechanisms between the species along the gradient? How do these species respond, in terms of optimum temperature for photosynthesis, to increasing altitude? Lupinus meridanus shows frost avoidance, in contrast to L. eromonomos, which tolerates freezing at higher altitudes. Optimum temperature for photosynthesis decreases along the gradient for both species. Maximum C0(2) assimilation rates were higher in L. meridanus, while L. eromonomos showed decreasing C0(2) assimilation rates at the higher altitude. In most cases, measured daily leaf temperature is always within the 80 % of optimum for photosynthesis. L. meridanus7 upper distribution limit seems to be restricted by cold resistance mechanisms, while L. eromonomos7 to a combination of both cold resistance and to C0(2) assimilation responses at higher altitudes.
author	RADA,FERMÍN BRICEÑO,BENITO AZÓCAR,AURA
author_facet	RADA,FERMÍN BRICEÑO,BENITO AZÓCAR,AURA
author_sort	RADA,FERMÍN
title	How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
title_short	How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
title_full	How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
title_fullStr	How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
title_full_unstemmed	How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
title_sort	how do two lupinus species respond to temperature along an altitudinal gradient in the venezuelan andes?
publisher	Sociedad de Biología de Chile
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300003
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How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?

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