Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.

Lotus corniculatus L. is a perennial forage legume species highly-adapted to growth under drought conditions. However, the genetic and physiological mechanisms involved in its adaptive capacity have not been elucidated. The role of osmotic adjustment (OA) and water-use efficiency (WUE) on the drough...

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Autores principales:	Inostroza,Luis, Acuña,Hernán, Tapia,Gerardo
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2015
Materias:	Drought acclimation genetic variability physiological traits transpiration rate
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000100001
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spelling	oai:scielo:S0718-583920150001000012018-10-01Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.Inostroza,LuisAcuña,HernánTapia,Gerardo Drought acclimation genetic variability physiological traits transpiration rate Lotus corniculatus L. is a perennial forage legume species highly-adapted to growth under drought conditions. However, the genetic and physiological mechanisms involved in its adaptive capacity have not been elucidated. The role of osmotic adjustment (OA) and water-use efficiency (WUE) on the drought tolerance of L. corniculatus was studied in a greenhouse experiment. Seven cultivars of different origin were subjected to two contrasting treatments of available soil water: No water stress (NWS) and with water stress (WWS). Xylem water potential (Ψx), osmotic potential (Ψπ), pressure potential (Ψp), relative water content (RWC), stomatal conductance (g s), shoot DM production, water transpiration (T), and WUE (shoot DM/T) were measured. Water treatments significantly (P < 0.05) affected plant water status, which was reflected in reduced Ψx, RWC, g s, and transpiration rate in the WWS treatment compared with the NWS treatment. All cultivars showed a high capacity for OA under WWS treatment because Ψπ decreased by approximately 60% and Ψp increased by approximately 30%, compared with the NWS treatment. Cultivars with a higher solute accumulation (low Ψπ value) had the lowest DM production under WWS treatment. In contrast, WUE varied greatly among cultivars and was positively associated (R² = 0.88; P < 0.01) with DM production under drought conditions.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.75 n.1 20152015-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000100001en10.4067/S0718-58392015000100001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Drought acclimation genetic variability physiological traits transpiration rate
spellingShingle	Drought acclimation genetic variability physiological traits transpiration rate Inostroza,Luis Acuña,Hernán Tapia,Gerardo Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.
description	Lotus corniculatus L. is a perennial forage legume species highly-adapted to growth under drought conditions. However, the genetic and physiological mechanisms involved in its adaptive capacity have not been elucidated. The role of osmotic adjustment (OA) and water-use efficiency (WUE) on the drought tolerance of L. corniculatus was studied in a greenhouse experiment. Seven cultivars of different origin were subjected to two contrasting treatments of available soil water: No water stress (NWS) and with water stress (WWS). Xylem water potential (Ψx), osmotic potential (Ψπ), pressure potential (Ψp), relative water content (RWC), stomatal conductance (g s), shoot DM production, water transpiration (T), and WUE (shoot DM/T) were measured. Water treatments significantly (P < 0.05) affected plant water status, which was reflected in reduced Ψx, RWC, g s, and transpiration rate in the WWS treatment compared with the NWS treatment. All cultivars showed a high capacity for OA under WWS treatment because Ψπ decreased by approximately 60% and Ψp increased by approximately 30%, compared with the NWS treatment. Cultivars with a higher solute accumulation (low Ψπ value) had the lowest DM production under WWS treatment. In contrast, WUE varied greatly among cultivars and was positively associated (R² = 0.88; P < 0.01) with DM production under drought conditions.
author	Inostroza,Luis Acuña,Hernán Tapia,Gerardo
author_facet	Inostroza,Luis Acuña,Hernán Tapia,Gerardo
author_sort	Inostroza,Luis
title	Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.
title_short	Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.
title_full	Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.
title_fullStr	Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.
title_full_unstemmed	Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.
title_sort	relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of lotus corniculatus l.
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000100001
work_keys_str_mv	AT inostrozaluis relationshipsbetweenphenotypicvariationinosmoticadjustmentwateruseefficiencyanddroughttoleranceofsevencultivarsoflotuscorniculatusl AT acunahernan relationshipsbetweenphenotypicvariationinosmoticadjustmentwateruseefficiencyanddroughttoleranceofsevencultivarsoflotuscorniculatusl AT tapiagerardo relationshipsbetweenphenotypicvariationinosmoticadjustmentwateruseefficiencyanddroughttoleranceofsevencultivarsoflotuscorniculatusl
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Relationships between phenotypic variation in osmotic adjustment, water-use efficiency, and drought tolerance of seven cultivars of Lotus corniculatus L.

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