IIB   20738
INSTITUTO DE INVESTIGACIONES BIOLOGICAS
Unidad Ejecutora - UE
artículos
Título:
Hydrogen sulphide, a novel gasotransmitter involved in guard cell signalling
Autor/es:
GARCIA-MATA C.; LAMATTINA L.
Revista:
NEW PHYTOLOGIST
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2010 vol. 188 p. 977 - 984
ISSN:
0028-646X
Resumen:
Hydrogen sulphide (H2S) has been proposed as the third gasotransmitter. In
animal cells, H2S has been implicated in several physiological processes. H2S is
endogenously synthesized in both animals and plants by enzymes with L-Cys
desulphydrase activity in the conversion of L-Cys to H2S, pyruvate and ammonia.Hydrogen sulphide (H2S) has been proposed as the third gasotransmitter. In
animal cells, H2S has been implicated in several physiological processes. H2S is
endogenously synthesized in both animals and plants by enzymes with L-Cys
desulphydrase activity in the conversion of L-Cys to H2S, pyruvate and ammonia.2S has been implicated in several physiological processes. H2S is
endogenously synthesized in both animals and plants by enzymes with L-Cys
desulphydrase activity in the conversion of L-Cys to H2S, pyruvate and ammonia.L-Cys
desulphydrase activity in the conversion of L-Cys to H2S, pyruvate and ammonia.L-Cys to H2S, pyruvate and ammonia.
The participation of H2S in both stomatal movement regulation and abscisic acid
(ABA)-dependent induction of stomatal closure was studied in epidermal strips of
three plant species (Vicia faba, Arabidopsis thaliana and Impatiens walleriana).
The effect of H2S on stomatal movement was contrasted with leaf relative water
content (RWC) measurements of whole plants subjected to water stress.The participation of H2S in both stomatal movement regulation and abscisic acid
(ABA)-dependent induction of stomatal closure was studied in epidermal strips of
three plant species (Vicia faba, Arabidopsis thaliana and Impatiens walleriana).
The effect of H2S on stomatal movement was contrasted with leaf relative water
content (RWC) measurements of whole plants subjected to water stress.Vicia faba, Arabidopsis thaliana and Impatiens walleriana).
The effect of H2S on stomatal movement was contrasted with leaf relative water
content (RWC) measurements of whole plants subjected to water stress.2S on stomatal movement was contrasted with leaf relative water
content (RWC) measurements of whole plants subjected to water stress.
In this work we report that exogenous H2S induces stomatal closure and this
effect is impaired by the ATP-binding cassette (ABC) transporter inhibitor glibenclamide;
scavenging H2S or inhibition of the enzyme responsible for endogenous
H2S synthesis partially blocks ABA-dependent stomatal closure; and H2S treatment
increases RWC and protects plants against drought stress.In this work we report that exogenous H2S induces stomatal closure and this
effect is impaired by the ATP-binding cassette (ABC) transporter inhibitor glibenclamide;
scavenging H2S or inhibition of the enzyme responsible for endogenous
H2S synthesis partially blocks ABA-dependent stomatal closure; and H2S treatment
increases RWC and protects plants against drought stress.2S or inhibition of the enzyme responsible for endogenous
H2S synthesis partially blocks ABA-dependent stomatal closure; and H2S treatment
increases RWC and protects plants against drought stress.2S synthesis partially blocks ABA-dependent stomatal closure; and H2S treatment
increases RWC and protects plants against drought stress.
Our results indicate that H2S induces stomatal closure and participates in ABAdependent
signalling, possibly through the regulation of ABC transporters in guard
cells.Our results indicate that H2S induces stomatal closure and participates in ABAdependent
signalling, possibly through the regulation of ABC transporters in guard
cells.