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Plants growing in acid soils suffer both phosphorus (P) deficiency and aluminum (Al) toxicity stresses. Selection of genotypes for adaptation to either P deficiency or Al toxicity has sometimes been unsuccessful because these two soil factors often interact. Two experiments were conducted to eval...


Jemo, M.Abaidoo, R.C.Nolte, C.Horst, Walter J.[Aluminum resistance of cowpea as affected by phosphorusdeficiency stress]Aluminum resistance of cowpea as affected by phosphorusdeficiency stress

BACKGROUND Plants depend on their root systems to acquire the water and nutrients necessary for their survival in nature, and for their yield and nutritional quality in agriculture. Root systems are complex and a variety of root phenes have been identified as contributors to adaptation to soils w...


Rao, Idupulapati M.Miles, John W.Beebe, Stephen E.Horst, Walter J.[Root adaptations to soils with low fertility and aluminium toxicity]Root adaptations to soils with low fertility and aluminium toxicity
Rangel Becerra, AFRao, Idupulapati M.Braun, HPHorst, Walter J.[Aluminum resistance in common bean (Phaseolus vulgaris) involves induction and maintenance of citrate exudation from root apices]Aluminum resistance in common bean (Phaseolus vulgaris) involves induction and maintenance of citrate exudation from root apices

• Aluminium (Al) toxicity and drought are two major stress factors limiting common bean (Phaseolus vulgaris) production on tropical acid soils. Polyethylene glycol (PEG) treatment reduces Al uptake and Al toxicity. • The effect of PEG 6000‐induced osmotic stress on the expression of genes was st...


Yang, Z.B.Eticha, DRotter, BRao, Idupulapati M.Horst, Walter J.[Physiological and molecular analysis of polythylene glycol-induced reduction of aluminium accumulation in the root tips of common bean (Phaseolus vulgaris)]Physiological and molecular analysis of polythylene glycol-induced reduction of aluminium accumulation in the root tips of common bean (Phaseolus vulgaris)

We conducted field experiments over 2 years on two acid soils of southern Cameroon to test whether efficient uptake and use of phosphorus (P) from less available sources by grain legume genotypes could benefit subsequent rotational maize. We grew two crops each year. For the first crop we grew 4 ...


Jemo, M.Abaidoo, R.C.Nolte, CTchienkoua, MSanginga, NteranyaHorst, Walter J.[Phosphorus benefits from grain-legume crops to subsequent maize grown on acid soils of southern Cameroon]Phosphorus benefits from grain-legume crops to subsequent maize grown on acid soils of southern Cameroon

Common bean (Phaseolus vulgaris L.) proved to be very sensitive of low pH (4.3), with large genotypic differences in proton sensitivity. Therefore, proton toxicity did not allow the screening of common bean genotypes for aluminium (Al) resistance using the established protocol for maize (0.5 mM C...


Rangel Becerra, AFMobin, MRao, Idupulapati M.Horst, Walter J.[Proton toxicity interferes with the screening of common bean (Phaseolus vulgaris L.) genotypes for aluminium resistance in nutrient solution]Proton toxicity interferes with the screening of common bean (Phaseolus vulgaris L.) genotypes for aluminium resistance in nutrient solution

We summarize progress made towards the development of tools and knowledge that aid the genetic improvement of aluminum (Al) resistance in two of CIAT’s (International Center for Tropical Agriculture) commodity crops; common bean (Phaseolus vulgaris L.) and brachiariagrasses (Brachiaria spp. Grisi...


Rao, Idupulapati M.Wenzl, PeterArango Vélez, AdrianaMiles, John W.Watanabe, ToshihiroShinano, TakuroOsaki, MitsuruWagatsuma, TadaoManrique, GermánBeebe, Stephen E.Tohme, Joseph M.Ishitani, ManabuRangel Becerra, Andrés FelipeHorst, Walter J.[Advances in developing screening methods and improving aluminum resistance in common bean and brachiaria]Advances in developing screening methods and improving aluminum resistance in common bean and brachiaria

The initial response of plants to aluminium (Al) is an inhibition of root elongation. In the present study, short and medium-term effects of Al treatment (20??M) on root growth and Al accumulation of two common bean (Phaseolus vulgaris L.) genotypes, VAX-1 (Al-sensitive) and Quimbaya (Al-resistan...


Rangel Becerra, AFRao, Idupulapati M.Horst, Walter J.[Spatial aluminium sensitivity of root apices of two common bean (Phaseolus vulgaris L.) genotypes with contrasting aluminium resistance]Spatial aluminium sensitivity of root apices of two common bean (Phaseolus vulgaris L.) genotypes with contrasting aluminium resistance

An experiment was conducted for 4 years to assess the effectiveness of fallow, slash and burn farming systems on maize grain yield and soil chemical characteristics. It was also meant to measure the response to yearly rotation of maize and leguminous crops (cowpea and mucuna), as options for mana...


The, C.Meka, S.Ngonkeu, E.Bell, J.M.Mafouasson, H.A.Menkir, A.Calba, H.Zonkeng, C.Atemkeng, M.Horst, Walter J.[Maize grain yield response to changes in acid soil characteristics with yearly leguminous crop rotation, fallow, slash, burn and liming practices]Maize grain yield response to changes in acid soil characteristics with yearly leguminous crop rotation, fallow, slash, burn and liming practices
Rao, Idupulapati M.Friesen, Dennis K.Horst, Walter J.[Opportunities for germplasm selection to influence phosphorus acquisition from low-phosphorus soils]Opportunities for germplasm selection to influence phosphorus acquisition from low-phosphorus soils

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