General information

Mutant name abi2-1/sbr
Mutant/Transgenic plant mutant
Ecotype Ler
Mutagenesis type other
Dominant/Recessive/Semi-dominant semi-dominant
PMID 12008902
CommentThe sbr mutant was identified in the same mutant screen as hlq by its phenotype of stunted roots in the absence of ABA.

Mutated genes

Locus name Alias Hormone Mutated site Paper description
AT5G57050 ABI2 abscisic acid G168D in the PP2C domain encodes a Calcium ion binding / protein phosphatase type 2C, Facilitates the activation of slow anion channels and stomata closure mediated by abscisic acid (ABA).
AT1G79040 SBR abscisic acid SHORT BLUE ROOT

Phenotype information

Organ AttributeNo hormone
Root otherThe primary root did not expand beyond a length of 3-4mm or form lateral roots.often produced advertitious roots from the hypocotyl or the root-shoot junction.
Cotyledon/Leaf otherThe cotyledons and true leaves of the mutant seedlings were epinastic and darker green.
Hypocotyl/Stem Hypocotyl lengthsevere dwarf growth.