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Table 1 Mutant alleles used in the study with the description of corresponding genes and mutant phenotypes

From: Brassinosteroid-mediated stress tolerance in Arabidopsis shows interactions with abscisic acid, ethylene and salicylic acid pathways

Category Locus (AGI) Gene Description Mutant allele
used
References
SA synthesis
Defective
AT4G39030 EDS5 member of the MATE-transporter family;
mutants do not accumulate SA after pathogen inoculation and are hypersusceptible to pathogen infection.
eds5-1 [73, 74]
SA-insensitive AT1G64280 NPR1 similar to the transcription factor inhibitor I kappa B, and contains ankyrin repeats;
key regulator of SA-mediated systemic acquired
resistance (SAR) pathway;
mutants are SA-insensitive and hypersusceptible
to pathogen infection.
npr1-1 [43, 75, 76]
High SA levels AT5G64930 CPR5 regulator of expression of pathogenesis-related (PR) genes;
participates in signal transduction pathways involved in plant defense;
mutants exhibit increased SA levels and constitutive expression of PR genes.
cpr5-2 [63]
ET-insensitive AT5G03280 EIN2 NRAMP metal transporter family; involved in ET signal transduction;
mutants are ET-insensitive.
ein2 [77]
High ET levels AT3G51770 ETO1 encodes a negative regulator of 1-aminocyclopropane-1-carboxylic acid synthase5(ACS5), which catalyzes the rate-limiting step in ET biosynthesis;
mutations elevate ET biosynthesis by affecting the posttranscriptional regulation of ACS.
eto1-1 [77]
JA-deficient AT5G42650 AOS encodes a member of the cytochrome p450 CYP74 gene family that functions as an allene oxide synthase;
catalyzes dehydration of the hydroperoxide to an unstable allene oxide in the JA biosynthetic pathway;
mutants are JA-deficient.
aos [78]
JA-insensitive AT2G46370 JAR1 encodes cytoplasmic localized phytochrome A signaling component protein similar to the GH3 family of proteins;
loss of function mutants are defective in a variety of responses to JA.
jar1-1 [79]
ABA-deficient AT5G67030 ABA1 encodes zeaxanthin epoxidase gene that functions in first step of ABA biosynthesis;
mutants are ABA-deficient.
aba1-1 [80]
ABA-insensitive AT4G26080 ABI1 Protein phosphatase 2C; involved in ABA signal transduction;
mutants are ABA-insensitive.
abi1-1 [81]