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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

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

Díaz, Lucy MilenaRicaurte Oyola, José JaumerCajiao V., César HernandoGaleano, Carlos H.Rao, Idupulapati M.Beebe, Stephen E.Raatz, Bodo[Phenotypic evaluation and QTL analysis of yield and symbiotic nitrogen fixation in a common bean population grown with two levels of phosphorus supply]Phenotypic evaluation and QTL analysis of yield and symbiotic nitrogen fixation in a common bean population grown with two levels of phosphorus supply
Fonte, Steven J.Nesper, MaikeHegglin, DjangoVelásquez, Jaime E.Ramírez, BerthaRao, Idupulapati M.Bernasconi, Stefano M.Bünemann, Else K.Frossard, EmmanuelOberson, Astrid[Pasture degradation impacts soil phosphorus storage via changes to aggregate-associated soil organic matter in highly weathered tropical soils]Pasture degradation impacts soil phosphorus storage via changes to aggregate-associated soil organic matter in highly weathered tropical soils

It is generally assumed that phosphorus (P) availability for plant growth on highly weathered and P-deficient tropical soils may depend more on biologically mediated organic P (Po) turnover processes than on the release of adsorbed inorganic P (Pi). However, experimental evidence showing the link...


Oberson, AstridFriesen, Dennis K.Rao, Idupulapati M.Buhler, SFrossard, Emmanuel[Phosphorus transformations in an oxisol under contrasting land-use systems: The role of the soil microbial biomass]Phosphorus transformations in an oxisol under contrasting land-use systems: The role of the soil microbial biomass

Phosphorus (P) deficiency increased the secretion of phytases from roots of various plant species. The secretory phytases were collected with a dialysis membrane tube for 24 hours from roots of sixteen plant species grown with low or adequate supply of P in nutrient solutions. The activity of not...


Li, MOsaki, MRao, Idupulapati M.Tadano, T[Secretion of phytase from the roots of several plant species under phosphorus-deficient conditions]Secretion of phytase from the roots of several plant species under phosphorus-deficient conditions

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, S.Rao, Idupulapati M.Barrios, EdmundoSingh, B.R.[Plant growth, mycorrhizal association, nutrient uptake and phosphorus dynamics in a volcanic-ash soil in Colombia as affected by the establishment of Tithonia diversifolia]Plant growth, mycorrhizal association, nutrient uptake and phosphorus dynamics in a volcanic-ash soil in Colombia as affected by the establishment of Tithonia diversifolia

The phosphorus (P) content of whole roots and root apices has been reported to increase under aluminum (Al) stress, particularly in Al-sensitive plant varieties. We investigated the impact of Al toxicity on the P content of root apices of two tropical forage cultivars of the Brachiaria genus, gro...


Wenzl, PeterMayer, Jorge EdgardRao, Idupulapati M.[Aluminum stress inhibits accumulation of phosphorus in root apices of aluminum-sensitive but not aluminum-resistant brachiaria cultivar]Aluminum stress inhibits accumulation of phosphorus in root apices of aluminum-sensitive but not aluminum-resistant brachiaria cultivar

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