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Brachiaria species are widely sown on the infertile and Al-toxic soils of neotropical savannas. Breeding programs seek to combine edaphic adaptation with other traits in interspecific hybrids. Edaphic adaptation is difficult to assess because it is only manifest in pasture persistence across seve...


Wenzl, PeterArango Vélez, AdrianaChavez, Alba L.Buitrago González, M.E.Patino, GMMiles, John W.Rao, Idupulapati M.[A greenhouse method to screen brachiariagrass genotypes for aluminum resistance and root vigor]A greenhouse method to screen brachiariagrass genotypes for aluminum resistance and root vigor
Nesper, MaikeBünemann, Else K.Fonte, Steven J.Rao, Idupulapati M.Velásquez, Jaime E.Ramírez, BerthaHegglin, DjangoFrossard, EmmanuelOberson, Astrid[Pasture degradation decreases organic P content of tropical soils due to soil structural decline]Pasture degradation decreases organic P content of tropical soils due to soil structural decline

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 germplasm from both the Andean a...


Blair, Matthew W.López Marin, H.D.Rao, Idupulapati M.[Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes]Identification of aluminum resistant Andean common bean (Phaseolus vulgaris L.) genotypes

Aluminum is usually regarded as the determining factor for plant growth in acid soils and nutrient deficiencies are often additional growth-limiting factors in tropical acid soils. Taking into account the potential interactions between Al toxicity and nutrient deficiencies, the present study inve...


Akhter, AKhan, S.H.Hiroaki, ETawaraya, KRao, Idupulapati M.Wenzl, PeterIshikawa, S.Wagatsuma, Tadao[Greater contribution of low-nutrient tolerance to sorghum and maize growth under combined stress conditions with high aluminum and low nutrients in solution culture simulating the nutrient status of tropical acid soils]Greater contribution of low-nutrient tolerance to sorghum and maize growth under combined stress conditions with high aluminum and low nutrients in solution culture simulating the nutrient status of tropical acid soils

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

Aluminium (Al) toxicity limits common bean productivity in acid soil regions of the tropics. To improve Al resistance of common bean, Al-sensitive Phaseolus vulgaris (SER16) was crossed to Al-resistant P. coccineus (G35346-3Q) to create 94 F5:6 recombinant inbred lines (RILs) of the pedigree SER1...


Butare, LouisRao, Idupulapati M.Lepoivre, PhilippeCajiao V., César HernandoPolanía Perdomo, José A.Cuasquer, Juan B.Beebe, Stephen E.[Phenotypic evaluation of interspecific recombinant inbred lines (RILs) of Phaseolus species for aluminium resistance and shoot and root growth response to aluminium–toxic acid soil]Phenotypic evaluation of interspecific recombinant inbred lines (RILs) of Phaseolus species for aluminium resistance and shoot and root growth response to aluminium–toxic acid soil

As Brachiaria hybrid cv. ‘Mulato’ has adapted to acid soils with extremely low phosphorus (P) contents, its low-P-tolerance mechanisms were investigated and compared with those of wheat (Triticum aestivum L.) and rice (Oryza sativa L. cv. ‘Kitaake’). Among the three plant species, the highest P-u...


Begum, Hasna HenaOsaki, MitsuruNanamori, MasahitoWatanabe, ToshihiroShinano, TakuroRao, Idupulapati M.[Role of phosphoenolpyruvate carboxylase in the adaptation of a tropical forage grass to low-phosphorus acid soils]Role of phosphoenolpyruvate carboxylase in the adaptation of a tropical forage grass to low-phosphorus acid soils

Many tropical forage grasses and legumes grow well in acid soils, adapting to excess aluminum (Al) and phosphorus (P) starvation stresses by using mechanisms that are still unclear. To determine these mechanisms, responses to Al toxicity and P starvation in three tropical forages were studied: tw...


Watanabe, ToshihiroOsaki, MitsuruYano, HiromiRao, Idupulapati M.[Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages]Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages
Phiri, SamuelAmézquita Collazos, EdgarRao, Idupulapati M.[Constructing an arable layer through chisel tillage and agropastoral systems in tropical savanna soils of the Llanos of Colombia]Constructing an arable layer through chisel tillage and agropastoral systems in tropical savanna soils of the Llanos of Colombia
Rao, Idupulapati M.Borrero, V.Ricaurte Oyola, José JaumerGarcía, RamiroAyarza, Miguel Angel[Adaptive attributes of tropical forage species to acid soils. II. Differences in shoot and root growth responses to varying phosphorus supply and soil type]Adaptive attributes of tropical forage species to acid soils. II. Differences in shoot and root growth responses to varying phosphorus supply and soil type

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