General information

Mutant name gtg1 gtg2
Mutant/Transgenic plant mutant
Ecotype Ws
Mutagenesis type cross T-DNA insertion lines of gtg1 and gtg2
Dominant/Recessive/Semi-dominant
PMID 19135895
CommentNo comment

Mutated genes

Locus name Alias Hormone Mutated site Paper description
AT1G64990 GTG1 abscisic acid T-DNA insertion in 1000 Encodes a GPCR-type G protein receptor with nine predicted transmembrane domains. The protein binds abscisic acid (ABA) and is predicted to function as an ABA receptor. It has GTP-binding and GTPase activity and binds to ABA more effectively in the presence of GDP. GTG1 binds to GPA1, the alpha subunit of the heterotrimeric G protein. GPA1 (in its GTP-bound state) affects the GTP binding and GTPase activity of GTG1 and may act to down-regulate GTG1 binding to ABA. GTG1 is widely expressed throughout the plant and appears to be involved in the regulation of several ABA-dependent responses including seed germination, plant development, and promotion of stomatal closure. GTG1 transcript levels do not appear to change in response to ABA or abiotic stresses.
AT4G27630 GTG2 abscisic acid T-DNA insertion in 3000 Encodes a GPCR-type G protein receptor with nine predicted transmembrane domains. The protein binds abscisic acid (ABA) and is predicted to function as an ABA receptor. It has GTP-binding and GTPase activity and binds to ABA more effectively in the presence of GDP. GTG2 binds to GPA1, the alpha subunit of the heterotrimeric G protein. GPA1 (in its GTP-bound state) affects the GTP binding and GTPase activity of GTG2 and may act to down-regulate GTG2 binding to ABA. GTG2 is widely expressed throughout the plant and appears to be involved in the regulation of several ABA-dependent responses including seed germination, plant development, and promotion of stomatal closure. GTG2 transcript levels do not appear to change in response to ABA or abiotic stresses.

Phenotype information

Organ AttributeNo hormoneabscisic acid
Root Primary root-long
Cotyledon/Leaf Stomata aperture-larger
Silique/Seed Germination rate-increased and more green cotyledon post germination