Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability

Different studies have determined that environmental variation is a key factor determining the outcome of competition within plant communities. Considering the importance of the resource water in non-irrigated lands of Argentina, the aim was to determine the effects of water deficit on relative grow...

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Detalles Bibliográficos
Autores principales: Leguizamón, Eduardo S., Yanniccari, Marcos, Guiamet, Juan José, Acciaresi, Horacio Abel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Agrarias
Competition
Photosynthesis
Relative growth rate
Transpiration
Weed biology
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84098
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84098
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Competition
Photosynthesis
Relative growth rate
Transpiration
Weed biology
spellingShingle Ciencias Agrarias
Competition
Photosynthesis
Relative growth rate
Transpiration
Weed biology
Leguizamón, Eduardo S.
Yanniccari, Marcos
Guiamet, Juan José
Acciaresi, Horacio Abel
Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability
topic_facet Ciencias Agrarias
Competition
Photosynthesis
Relative growth rate
Transpiration
Weed biology
description Different studies have determined that environmental variation is a key factor determining the outcome of competition within plant communities. Considering the importance of the resource water in non-irrigated lands of Argentina, the aim was to determine the effects of water deficit on relative growth rate (RGR), root length ratio (RLR), gas exchange and competitive ability of Sorghum halepense populations collected in humid and subhumid regions of the Pampa plains. Under semi-controlled conditions, we compared plants of seven S. halepense populations subjected to three different levels of soil water availability during 3 wk: Field capacity (FC), 75% FC and drought (D). Moreover, total above-ground biomass of S. halepense and Zea mays plants growing together in competition was determined. It was found that those plants collected in humid or subhumid regions had greater RGR, gas exchange and RLR under FC and D, respectively. Zea mays achieved a higher competitive ability than S. halepense under FC, but plants collected in humid regions outcompeted the crop when grown at 75% FC. Sorghum halepense plants collected in subhumid regions dominated under D. Root length ratio may have favored the maintenance of high levels of gas exchange and also high RGR, thus contributing to sustain a competitive hierarchy under soil water stress.
format Articulo
Articulo
author Leguizamón, Eduardo S.
Yanniccari, Marcos
Guiamet, Juan José
Acciaresi, Horacio Abel
author_facet Leguizamón, Eduardo S.
Yanniccari, Marcos
Guiamet, Juan José
Acciaresi, Horacio Abel
author_sort Leguizamón, Eduardo S.
title Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability
title_short Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability
title_full Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability
title_fullStr Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability
title_full_unstemmed Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability
title_sort growth, gas exchange and competitive ability of sorghum halepense populations under different soil water availability
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84098
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AT guiametjuanjose growthgasexchangeandcompetitiveabilityofsorghumhalepensepopulationsunderdifferentsoilwateravailability
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