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Anatomical root variations in response to water deficit: wild and domesticated common bean (Phaseolus vulgaris L) Biol. Res.
Peña-Valdivia,Cecilia B; Sánchez-Urdaneta,Adriana B; Meza Rangel,Joel; Juárez Muñoz,Juana; García-Nava,Rodolfo; Celis Velázquez,Raquel.
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...
Tipo: Journal article Palavras-chave: Endodermis; Protoderm; Seedlings; Water potential; Xylem.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000400006
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