Gradients in stomatal conductance, xylem sap ABA and bulk leaf ABA along canes of Vitis vinifera cv. Shiraz: molecular and physiological studies investigating their source

Functional Plant Biology : FPB
Christopher J SoarBrian Loveys

Abstract

Gradients were observed in xylem sap ABA and in stomatal conductance along canes of Vitis vinifera L. cv. Shiraz. To investigate the source of the ABA responsible for these gradients a series of girdling and decapitation experiments were carried out. Leaf stomatal conductance and bulk ABA of leaves and apices were measured in control plants and in response to apex removal or girdling. Gradients in leaf ABA were observed over the first eight expanded leaves of field-grown Shiraz, with higher concentrations of ABA observed towards the apex. Gradients in stomatal conductance that correlated negatively with the concentration of ABA in the leaf ([ABA]leaf) were also observed over the first eight leaves. No significant effect of decapitation was observed on either leaf ABA or stomatal conductance except for the leaf immediately below the apex where a transient increase in [ABA]leaf was observed after 24 h with no corresponding decrease in conductance. Girdling resulted in an increase in [ABA]leaf in leaves distal to the girdle without the corresponding effect on conductance. These effects were further studied at the level of gene activity. To facilitate this, gene sequences encoding two key enzymes involved in the biosynthetic pathwa...Continue Reading

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Citations

Sep 28, 2007·Plant, Cell & Environment·Simone D CastellarinGabriele DI Gaspero
Apr 20, 2016·BMC Plant Biology·Landry RossdeutschNathalie Ollat
Jan 14, 2012·Planta·Irene PerroneAndrea Schubert
Jan 1, 2014·Horticulture Research·Daniel W HopperGrant R Cramer
Dec 27, 2019·Briefings in Functional Genomics·Manoj Kumar DharSanjana Kaul
Aug 16, 2008·Journal of Experimental Botany·Ali IzanlooThorsten Schnurbusch
Jan 30, 2015·Journal of Experimental Botany·Ian C DoddMartin S A Blackwell
Jul 14, 2018·International Journal of Molecular Sciences·Israel de Jesus Sampaio FilhoJeffrey Quintin Chambers
Aug 10, 2013·Plant, Cell & Environment·Rebecca K VandeleurStephen D Tyerman
Mar 24, 2016·BMC Plant Biology·Supakan RattanakonGrant R Cramer
Apr 8, 2021·The Plant Journal : for Cell and Molecular Biology·Seo-Young LeeByoung-Cheorl Kang

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Datasets Mentioned

BETA
AY337614
CF403209
AY337615

Methods Mentioned

BETA
PCR

Software Mentioned

Protpars
Clustal W
Genstat
ANGIS

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