Phenotypic response of Lycopersicon chilense to water deficit

ABSTRACT Environmental-induced phenotypic variation in plants is often considered to be a functional response that maximizes fitness in heterogeneous environments. Lycopersicon chilense, a tomato species endemic to Atacama Desert, shows altitudinal phenotypics variations in their natural environment...

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Autores principales:	MALDONADO,CARLOS, SQUEO,FRANCISCO A, IBACACHE,ERIC
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2003
Materias:	phenotypic response water stress physiological adjustment self-organization wild tomato
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000100012
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spelling	oai:scielo:S0716-078X20030001000122003-05-30Phenotypic response of Lycopersicon chilense to water deficitMALDONADO,CARLOSSQUEO,FRANCISCO AIBACACHE,ERIC phenotypic response water stress physiological adjustment self-organization wild tomato ABSTRACT Environmental-induced phenotypic variation in plants is often considered to be a functional response that maximizes fitness in heterogeneous environments. Lycopersicon chilense, a tomato species endemic to Atacama Desert, shows altitudinal phenotypics variations in their natural environments, which could be due to different soil water availabilities. It is hypothesized that (a) seeds coming from populations of different environments, cultivated in the same environment, will have similar phenotypes, if populations are not genetically differentiated, and that (b) the different populations subjected to two drought levels should vary their phenotypic constitution with respect to the control groups. The responses of twenty phenotypic traits to different irrigation levels were studied in nine wild populations of Lycopersicon chilense. Seeds were collected from populations along an altitudinal gradient (from 20 m to 3,075 m), transferred to a common environment and grown under three soil water conditions: low (80 % FC), moderate (40 % FC) and severe (20 % FC). In spite of the climatic differences in their natural habitat the phenotypic responses of plants growing in the same environment was similar in the nine populations. Significant differences among populations were only observed in three out of twenty traits (fruit fresh weight, fruit volume and number of seeds per fruit). Soil water deficit induced a phenotypic response in twelve characters; among these: root dry weight, cover, number of seeting fruits and number of seeds per fruit showed the highest significance. An interaction between population and drought treatment was found only for fresh weight of fruits, fruit volume and number of seeds per fruit. Our data indicate that the phenotypic response does not differ among populations growing under similar environmental conditions. Probably the phenotypic response of L. chilense in their natural habitats is related to physiological and metabolic adjustment rather than genetic variation.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.76 n.1 20032003-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000100012en10.4067/S0716-078X2003000100012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	phenotypic response water stress physiological adjustment self-organization wild tomato
spellingShingle	phenotypic response water stress physiological adjustment self-organization wild tomato MALDONADO,CARLOS SQUEO,FRANCISCO A IBACACHE,ERIC Phenotypic response of Lycopersicon chilense to water deficit
description	ABSTRACT Environmental-induced phenotypic variation in plants is often considered to be a functional response that maximizes fitness in heterogeneous environments. Lycopersicon chilense, a tomato species endemic to Atacama Desert, shows altitudinal phenotypics variations in their natural environments, which could be due to different soil water availabilities. It is hypothesized that (a) seeds coming from populations of different environments, cultivated in the same environment, will have similar phenotypes, if populations are not genetically differentiated, and that (b) the different populations subjected to two drought levels should vary their phenotypic constitution with respect to the control groups. The responses of twenty phenotypic traits to different irrigation levels were studied in nine wild populations of Lycopersicon chilense. Seeds were collected from populations along an altitudinal gradient (from 20 m to 3,075 m), transferred to a common environment and grown under three soil water conditions: low (80 % FC), moderate (40 % FC) and severe (20 % FC). In spite of the climatic differences in their natural habitat the phenotypic responses of plants growing in the same environment was similar in the nine populations. Significant differences among populations were only observed in three out of twenty traits (fruit fresh weight, fruit volume and number of seeds per fruit). Soil water deficit induced a phenotypic response in twelve characters; among these: root dry weight, cover, number of seeting fruits and number of seeds per fruit showed the highest significance. An interaction between population and drought treatment was found only for fresh weight of fruits, fruit volume and number of seeds per fruit. Our data indicate that the phenotypic response does not differ among populations growing under similar environmental conditions. Probably the phenotypic response of L. chilense in their natural habitats is related to physiological and metabolic adjustment rather than genetic variation.
author	MALDONADO,CARLOS SQUEO,FRANCISCO A IBACACHE,ERIC
author_facet	MALDONADO,CARLOS SQUEO,FRANCISCO A IBACACHE,ERIC
author_sort	MALDONADO,CARLOS
title	Phenotypic response of Lycopersicon chilense to water deficit
title_short	Phenotypic response of Lycopersicon chilense to water deficit
title_full	Phenotypic response of Lycopersicon chilense to water deficit
title_fullStr	Phenotypic response of Lycopersicon chilense to water deficit
title_full_unstemmed	Phenotypic response of Lycopersicon chilense to water deficit
title_sort	phenotypic response of lycopersicon chilense to water deficit
publisher	Sociedad de Biología de Chile
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000100012
work_keys_str_mv	AT maldonadocarlos phenotypicresponseoflycopersiconchilensetowaterdeficit AT squeofranciscoa phenotypicresponseoflycopersiconchilensetowaterdeficit AT ibacacheeric phenotypicresponseoflycopersiconchilensetowaterdeficit
_version_	1718439541169192960

Phenotypic response of Lycopersicon chilense to water deficit

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