Title : ABI1 protein phosphatase 2C is a negative regulator of abscisic acid signaling.

Pub. Date : 1999 Oct

PMID : 10521520






13 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 ABI1 protein phosphatase 2C is a negative regulator of abscisic acid signaling. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
2 In Arabidopsis, the ABI1 gene encodes a member of the 2C class of protein serine/threonine phosphatases (PP2C), and the abi1-1 mutation markedly reduces ABA responsiveness in both seeds and vegetative tissues. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
3 In Arabidopsis, the ABI1 gene encodes a member of the 2C class of protein serine/threonine phosphatases (PP2C), and the abi1-1 mutation markedly reduces ABA responsiveness in both seeds and vegetative tissues. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
4 Hence, it remained unclear whether ABI1 contributes to ABA signaling, and in case ABI1 does regulate ABA responsiveness, whether it is a positive or negative regulator of ABA action. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
5 Hence, it remained unclear whether ABI1 contributes to ABA signaling, and in case ABI1 does regulate ABA responsiveness, whether it is a positive or negative regulator of ABA action. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
6 In contrast to the ABA-resistant abi1-1 mutant, these revertants were more sensitive than the wild type to the inhibition of seed germination and seedling root growth by applied ABA. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
7 In contrast to the ABA-resistant abi1-1 mutant, these revertants were more sensitive than the wild type to the inhibition of seed germination and seedling root growth by applied ABA. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
8 The revertant alleles were recessive to the wild-type ABI1 allele in enhancing ABA sensitivity, indicating that this ABA-supersensitive phenotype results from a loss of function in ABI1. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
9 The revertant alleles were recessive to the wild-type ABI1 allele in enhancing ABA sensitivity, indicating that this ABA-supersensitive phenotype results from a loss of function in ABI1. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
10 The revertant alleles were recessive to the wild-type ABI1 allele in enhancing ABA sensitivity, indicating that this ABA-supersensitive phenotype results from a loss of function in ABI1. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
11 The revertant alleles were recessive to the wild-type ABI1 allele in enhancing ABA sensitivity, indicating that this ABA-supersensitive phenotype results from a loss of function in ABI1. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
12 These results indicate that a loss of ABI1 PP2C activity leads to an enhanced responsiveness to ABA. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana
13 Thus, the wild-type ABI1 phosphatase is a negative regulator of ABA responses. Abscisic Acid Protein phosphatase 2C family protein Arabidopsis thaliana