Title : Two Arabidopsis mutants that overproduce ethylene are affected in the posttranscriptional regulation of 1-aminocyclopropane-1-carboxylic acid synthase.

Pub. Date : 1999 Feb

PMID : 9952448






7 Functional Relationships(s)
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Compound Name
Protein Name
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1 The Arabidopsis mutants eto1 (ethylene overproducer) and eto3 produce elevated levels of ethylene as etiolated seedlings. ethylene tetratricopeptide repeat (TPR)-containing protein Arabidopsis thaliana
2 The Arabidopsis mutants eto1 (ethylene overproducer) and eto3 produce elevated levels of ethylene as etiolated seedlings. ethylene tetratricopeptide repeat (TPR)-containing protein Arabidopsis thaliana
3 Ethylene overproduction in eto1 and eto3 is limited mainly to etiolated seedlings; light-grown seedlings and various adult tissues produce close to wild-type amounts of ethylene. ethylene tetratricopeptide repeat (TPR)-containing protein Arabidopsis thaliana
4 Ethylene overproduction in eto1 and eto3 is limited mainly to etiolated seedlings; light-grown seedlings and various adult tissues produce close to wild-type amounts of ethylene. ethylene tetratricopeptide repeat (TPR)-containing protein Arabidopsis thaliana
5 Several compounds that induce ethylene biosynthesis in wild-type, etiolated seedlings through distinct 1-aminocyclopropane-1-carboxylic acid (ACC) synthase (ACS) isoforms were found to act synergistically with eto1 and eto3, as did the ethylene-insensitive mutation etr1 (ethylene resistant), which blocks feedback inhibition of biosynthesis. ethylene tetratricopeptide repeat (TPR)-containing protein Arabidopsis thaliana
6 ACS activity, the rate-limiting step of ethylene biosynthesis, was highly elevated in both eto1 and eto3 mutant seedlings, even though RNA gel-blot analysis demonstrated that the steady-state level of ACS mRNA was not increased, including that of a novel Arabidopsis ACS gene that was identified. ethylene tetratricopeptide repeat (TPR)-containing protein Arabidopsis thaliana
7 Taken together, these data suggest that the eto1 and eto3 mutations elevate ethylene biosynthesis by affecting the posttranscriptional regulation of ACS. ethylene tetratricopeptide repeat (TPR)-containing protein Arabidopsis thaliana