• Publications
  • Influence
Activation of Glucosidase via Stress-Induced Polymerization Rapidly Increases Active Pools of Abscisic Acid
It is proposed that the activation of inactive ABA pools by polymerized AtBG1 is a mechanism by which plants rapidly adjust ABA levels and respond to changing environmental cues. Expand
Abscisic acid and hydraulic conductivity of maize roots: a study using cell- and root-pressure probes
It was concluded that ABA acts at the plasmalemma, presumably by an interaction with water channels, and facilitated the cell-to-cell component of transport of water across the root cylinder. Expand
The Stomatal Response to Reduced Relative Humidity Requires Guard Cell-Autonomous ABA Synthesis
It is shown that guard cells possess the entire ABA biosynthesis pathway and that it appears upregulated by positive feedback by ABA, highlighting the primacy of abscisic acid (ABA) in the stomatal response to drying air. Expand
An abscisic acid-related reduced transpiration promotes gradual embolism repair when grapevines are rehydrated after drought.
A model is proposed to describe plant recovery after rehydration based on three main points: embolism repair occurs progressively in shoots and further in roots and in petioles, following an almost full recovery of Psi(leaf); hydraulic conductance recovers during diurnal transpiring hours. Expand
Abscisic acid in the xylem: where does it come from, where does it go to?
The significance of reflection coefficients (sigma(ABA), permeability coefficients of membranes (P(S)(ABA)) and apoplastic barriers for ABA is discussed and the factors that modify the intensity of the ABA signal in the xylem are of particular interest. Expand
Long-distance ABA Signaling and Its Relation to Other Signaling Pathways in the Detection of Soil Drying and the Mediation of the Plant’s Response to Drought
Evidence is reviewed for a variety of long-distance signaling pathways involving hormones and nutrient ions moving in the xylem sap that allow regulation of plant growth, development and functioning, and particularly shoot water status, as distinct from stress lesions in growth and other processes as a reaction to perturbations such as soil drying. Expand
Gating of water channels (aquaporins) in cortical cells of young corn roots by mechanical stimuli (pressure pulses): effects of ABA and of HgCl2.
It is concluded that inhibition is caused by the absolute value of intensities of water flow within the channels, which increased in proportion to the size of step changes in pressure. Expand
Long-distance signalling of abscisic acid (ABA): the factors regulating the intensity of the ABA signal.
Root growth-promoting microorganisms in the rhizosphere, lateral ABA flows in the root cortex across apoplastic barriers, ABA redistribution in the stem, leaf apoplastics pH values, and the action of beta-glucosidases play an important role in the regulation of signal intensity. Expand
Differential responses of maize MIP genes to salt stress and ABA.
The expression of the maize MIP gene family in response to NaCl was analysed by DNA array hybridization to examine a concomitant regulation of aquaporins and suggested the early induction of ZmPIP2;4 by NaCl may be mediated by ABA. Expand
Effects of P deficiency on assimilation and transport of nitrate and phosphate in intact plants of castor bean (Ricinus communis L.)
An experimentally-based modelling technique was applied to describe quantitatively the uptake, translocation, storage, and assimilation of NO 3 - and H 2 PO 4 - over a 9 d period in mid-vegetativeExpand