QUINTERO ARIZA , José Manuel

Excised 20-d-old sunflower roots (Helianthus annuus L. cv. Sun-Gro 380) with different Ca2+ status were used to study the effects of root Ca2+ status and abscisic acid (ABA) on the exudation rate (Jv), the hydraulic conductivity of the root (Lpr), the flux of exuded Ca2+ (JCa), and the gradient of rosmotic pressure between the xylem and the...

Excised 20-d-old sunflower roots ( Helianthusannuus L. cv. Sun-Gro 393) were used to study the effect of different sugars on rubidium and water fluxes. The roots sensed and absorbed glucose from the external medium inducing the activation of rubidium accu- mulated in the root (Rb q root), the flux of exuded rubidium ( J Rb ) and, to a lesser...

Método de corrección de la clorosis férrica en plantas a partir de ácido fosfórico enriquecido en Fe.La presente invención tiene por objeto la prevención y el control de la deficiencia de Fe (II) en plantas por aplicación directa al medio de cultivo o med

The fungus Trichoderma asperellum T34 is a biological control agent which has been shown to enhance Fe uptake by plants. The objective of this research was to study the contribution of T34 to Fe availability to cucumber plants in soils and how this potential supply can be affected by soil properties and in particular, by soil microbial...

Application of Fe salts with different organic matter sources has been demonstrated to be effective in preventing Fe deficiency chlorosis. The main objective of this work was to study the effectiveness of different Fe sources based on mixtures of humic substances or compost with vivianite in preventing this nutritional disorder in...

Phosphogypsum (PG) is a by-product of the P fertilizer industry usually valorised as amendment for acidic and sodic soils. This work was aimed to study the effects of PG on nutrient uptake by industrial tomato plants in an originally sodic soil. A completely randomized experiment was performed involving two factors: (i) acidification with...

Phosphogypsum (PG) has been usually applied as Ca-amendment to reclaim sodic soils such as those in the marshland area of Lebrija (SW Spain). This work aimed at the effects of PG amendments on the uptake of trace-elements by tomato and its implications for food safety. A completely randomized experiment was performed using a representative soil...

About 170 million tons of phosphogypsum (PG) are annually generated worldwide as a by-product of phosphoric acid factories. Agricultural uses of PG could become the main sink for this waste, which usually contains significant radionuclide (from the 238U-series) and toxic metals concentrations. To study PG effects on pollutant uptake by crops, a...

The main goal of this Project has been the radiological and alimentary assessment of the agriculture use of phosphogypsum (PG), a by-product of the fertilizer industry, as Ca-amendment in reclaimed salt-marsh soils in SW Spain. The work-plan included: PG characterization (concentrations of radionuclide and heavy metals, 222Rn exhalation from PG...

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