2009
DOI: 10.1590/s1677-04202009000400005
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Abstract: abbreviations: Al, aluminum; ARD, average root diameter; CIAT, Centro Internacional de Agricultura Tropical; QTL, quantitative trait loci; RB, root biomass; RER, root elongation rate; TRL, total root length; SRL, specific root length. abstract Aluminum (Al) toxicity is the principal abiotic constraint in acid soils of the tropics. Common bean, meanwhile, is for the most part very sensitive to this stress although certain genotypes within the species show some level of resistance, justifying screening of germpl… Show more

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Cited by 31 publications
(44 citation statements)
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“…This confirms previous reports on Andean and Mesoamerican genotypes (Rangel et al 2005(Rangel et al , 2007Blair et al 2009;López-Marín et al 2009). Only one accession of P. acutifolius was included in this study, but it was distinguished by its consistently greater values of SRL and correspondingly thinner roots, in both the hydroponic system and in soil cylinders, and under either stress.…”
Section: Discussionsupporting
confidence: 93%
See 1 more Smart Citation
“…This confirms previous reports on Andean and Mesoamerican genotypes (Rangel et al 2005(Rangel et al , 2007Blair et al 2009;López-Marín et al 2009). Only one accession of P. acutifolius was included in this study, but it was distinguished by its consistently greater values of SRL and correspondingly thinner roots, in both the hydroponic system and in soil cylinders, and under either stress.…”
Section: Discussionsupporting
confidence: 93%
“…Significant genotypic differences in Al resistance in common bean were reported based on Al-inhibited root elongation in nutrient solution (Foy 1988;Massot et al 1999;Rangel et al 2005Rangel et al , 2007Manrique et al 2006). Differential genotypic response to Al stress contributes to identification of new sources of Al resistance as well as improved understanding of mechanisms of Al resistance in common bean (Rangel et al 2005(Rangel et al , 2007(Rangel et al , 2009Blair et al 2009;López-Marín et al 2009). Resistance to Al in common bean is attributed to the release of citrate by the root apex ) and the expression of a citrate transporter MATE (multidrug and toxin extrusion family protein) gene is crucial for citrate exudation .…”
Section: Introductionmentioning
confidence: 99%
“…This is supported by the significantly high negative correlations between SRL and NOR (r = −0.73), and between SRL and RDM (r = −0.76); the moderate negative correlation of SRL with TDM (r = −0.50); and the weak negative correlation of SRL with SDM (r = −0.14). Blair et al (2009) observed a negative correlation between SRL and SRDM ratio in beans under aluminum toxicity. In this study, a strong positive correlation between SRL and SRDM ratio was observed, suggesting that increasing SRL will result in increasing the dry matter partitioned to the shoot rather than the roots in cereals.…”
Section: Correlation Among Seedling Traitsmentioning
confidence: 78%
“…QTLs for Al stress tolerance were first identified by López-Marín and . Andean genotypes have been screened for Al tolerance, with significant genetic variability identified for this trait (Blair et al 2009).…”
Section: Abiotic Stressesmentioning
confidence: 99%