Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition

In an environment involving water deficit and competition, weed species may show inefficient water use. The aim was to determine the water consumption strategy of Zea mays and Sorghum halepense and the effects of these strategies on crop and weed competitive ability.Under two soil water availability...

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Detalles Bibliográficos
Autores principales:	Acciaresi, Horacio Abel, Yanniccari, Marcos Ezequiel, Leguizamón, E., Guiamet, Juan José
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2012
Materias:	Ciencias Agrarias aggressivity instantaneous water use efficiency Johnsongrass relative water content relative yield total water potential
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/84007
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-84007
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 aggressivity instantaneous water use efficiency Johnsongrass relative water content relative yield total water potential
spellingShingle	Ciencias Agrarias aggressivity instantaneous water use efficiency Johnsongrass relative water content relative yield total water potential Acciaresi, Horacio Abel Yanniccari, Marcos Ezequiel Leguizamón, E. Guiamet, Juan José Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition
topic_facet	Ciencias Agrarias aggressivity instantaneous water use efficiency Johnsongrass relative water content relative yield total water potential
description	In an environment involving water deficit and competition, weed species may show inefficient water use. The aim was to determine the water consumption strategy of Zea mays and Sorghum halepense and the effects of these strategies on crop and weed competitive ability.Under two soil water availability conditions, the soil and leaf water potential (Ψ), relative water content (RWC) and leaf gas exchange parameters were measured during the critical period of crop competition in pot experiments where Z. mays and S. halepense were grown alone or in competition. In addition, the relative yield total and aggressivity index of both species were calculated.S. halepense showed continuous absorption of water, reaching a lower Ψ than the Z. mays hybrids. S. halepense maintained a RWC of above 90%, which only decreased to 70% in the case of competition for low water supplies. In Z. mays, RWC declined to values of 70% at both water levels. S. halepense exhibited active leaf gas exchange. Z. mays hybrids had lower competitive ability than S. halepense at both competition levels due to their conservative water use strategy. Sustained water use by the weed could be the cause of the increased aggressivity of S. halepense under water deficit conditions.
format	Articulo Articulo
author	Acciaresi, Horacio Abel Yanniccari, Marcos Ezequiel Leguizamón, E. Guiamet, Juan José
author_facet	Acciaresi, Horacio Abel Yanniccari, Marcos Ezequiel Leguizamón, E. Guiamet, Juan José
author_sort	Acciaresi, Horacio Abel
title	Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition
title_short	Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition
title_full	Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition
title_fullStr	Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition
title_full_unstemmed	Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition
title_sort	leaf gas exchange and competitive ability of zea mays and sorghum halepense as affected by water competition
publishDate	2012
url	http://sedici.unlp.edu.ar/handle/10915/84007
work_keys_str_mv	AT acciaresihoracioabel leafgasexchangeandcompetitiveabilityofzeamaysandsorghumhalepenseasaffectedbywatercompetition AT yanniccarimarcosezequiel leafgasexchangeandcompetitiveabilityofzeamaysandsorghumhalepenseasaffectedbywatercompetition AT leguizamone leafgasexchangeandcompetitiveabilityofzeamaysandsorghumhalepenseasaffectedbywatercompetition AT guiametjuanjose leafgasexchangeandcompetitiveabilityofzeamaysandsorghumhalepenseasaffectedbywatercompetition
bdutipo_str	Repositorios
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Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition

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