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...