Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)

Root anatomical responses to water deficit are diverse and regulation of water uptake strongly depends on plant anatomy. The ancestors of common bean (Phaseolus vulgaris L.) cultivars are the wild common beans. Because wild beans adapt and survive well in theon atural environment, it is hypothesized...

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Autores principales:	Peña-Valdivia,Cecilia B, Sánchez-Urdaneta,Adriana B, Meza Rangel,Joel, Juárez Muñoz,Juana, García-Nava,Rodolfo, Celis Velázquez,Raquel
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2010
Materias:	Endodermis protoderm seedlings water potential xylem
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000400006
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spelling	oai:scielo:S0716-976020100004000062011-02-01Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)Peña-Valdivia,Cecilia BSánchez-Urdaneta,Adriana BMeza Rangel,JoelJuárez Muñoz,JuanaGarcía-Nava,RodolfoCelis Velázquez,Raquel Endodermis protoderm seedlings water potential xylem Root anatomical responses to water deficit are diverse and regulation of water uptake strongly depends on plant anatomy. The ancestors of common bean (Phaseolus vulgaris L.) cultivars are the wild common beans. Because wild beans adapt and survive well in theon atural environment, it is hypothesized that wild common bean roots are less affected than those of domesticated beans at low substrate water potential (ψW). A wild common bean accession from Chihuahua Mexico and cv. Bayomex were studied. Seedlings with a mean root length between 3 and 4 cm were maintained for 24 h in vermiculite at ψW of -0.03 (well hydrated), -0.65, -1.48 and -2.35 MPa (partially dry). Ten anatomical characteristics of differentiation and cell division in root regions were evaluated. Thickness of epidermis and protoderm diminished similarly in wild and domesticated beans growing at low substrate ψW (between -0.65 and -2.35 MPa). At the same time, parenchymatic cell area diminished by 71 % in the domesticated variety, but by only 32 % in the wild bean at -2.35 MPa. Theon umber of cells in the cortex and the thickness of the xylem wall increased in both wild and domesticated beans at low substrate ψW;on evertheless, the effect was significantly lower in the wild bean. Theon umber of xylem vessels increased in the cultivar (up to 40 %) while in the wild bean it decreased (up to 33 %). The diameter of xylem vessels and transverse root area diminished (15 and 57 %, respectively) in the cultivar, but in the wild common bean wereon ot affected. Anatomical root characteristics and their modifications in both differentiation and cell division in root regions demonstrated that the wild bean reacted quite differently to substrate ψW than the domesticated common bean.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.43 n.4 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000400006en10.4067/S0716-97602010000400006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Endodermis protoderm seedlings water potential xylem
spellingShingle	Endodermis protoderm seedlings water potential xylem Peña-Valdivia,Cecilia B Sánchez-Urdaneta,Adriana B Meza Rangel,Joel Juárez Muñoz,Juana García-Nava,Rodolfo Celis Velázquez,Raquel Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)
description	Root anatomical responses to water deficit are diverse and regulation of water uptake strongly depends on plant anatomy. The ancestors of common bean (Phaseolus vulgaris L.) cultivars are the wild common beans. Because wild beans adapt and survive well in theon atural environment, it is hypothesized that wild common bean roots are less affected than those of domesticated beans at low substrate water potential (ψW). A wild common bean accession from Chihuahua Mexico and cv. Bayomex were studied. Seedlings with a mean root length between 3 and 4 cm were maintained for 24 h in vermiculite at ψW of -0.03 (well hydrated), -0.65, -1.48 and -2.35 MPa (partially dry). Ten anatomical characteristics of differentiation and cell division in root regions were evaluated. Thickness of epidermis and protoderm diminished similarly in wild and domesticated beans growing at low substrate ψW (between -0.65 and -2.35 MPa). At the same time, parenchymatic cell area diminished by 71 % in the domesticated variety, but by only 32 % in the wild bean at -2.35 MPa. Theon umber of cells in the cortex and the thickness of the xylem wall increased in both wild and domesticated beans at low substrate ψW;on evertheless, the effect was significantly lower in the wild bean. Theon umber of xylem vessels increased in the cultivar (up to 40 %) while in the wild bean it decreased (up to 33 %). The diameter of xylem vessels and transverse root area diminished (15 and 57 %, respectively) in the cultivar, but in the wild common bean wereon ot affected. Anatomical root characteristics and their modifications in both differentiation and cell division in root regions demonstrated that the wild bean reacted quite differently to substrate ψW than the domesticated common bean.
author	Peña-Valdivia,Cecilia B Sánchez-Urdaneta,Adriana B Meza Rangel,Joel Juárez Muñoz,Juana García-Nava,Rodolfo Celis Velázquez,Raquel
author_facet	Peña-Valdivia,Cecilia B Sánchez-Urdaneta,Adriana B Meza Rangel,Joel Juárez Muñoz,Juana García-Nava,Rodolfo Celis Velázquez,Raquel
author_sort	Peña-Valdivia,Cecilia B
title	Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)
title_short	Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)
title_full	Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)
title_fullStr	Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)
title_full_unstemmed	Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)
title_sort	anatomical root variations in response to water deficit: wild and domesticated common bean (phaseolus vulgaris l)
publisher	Sociedad de Biología de Chile
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000400006
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Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L)

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