PETAL LOSS and ROXY1 Interact to Limit Growth Within and between Sepals But to Promote Petal Initiation in Arabidopsis thaliana
Tezz Quon, Edwin R Lampugnani, David R Smyth
Frontiers in Plant Science | Frontiers Media | Published : 2017
The activity of genes controlling organ development may be associated with the redox state of subregions within the meristem. Glutaredoxins react to the level of oxidative potential and can reduce cysteine dithiols, in some cases to activate specific transcription factors. In Arabidopsis, loss of function of the glutaredoxin ROXY1 or the trihelix transcription factor PETAL LOSS (PTL) each results in reduced numbers of petals. Here, genetic studies have revealed that loss of petals in ptl mutant plants depends on ROXY1 function. The two genes also act together to restrain stamen-identifying C function from entering the outer whorls. On the other hand, they suppress growth between sepals and i..View full abstract
Awarded by Australian Research Council
TQ was supported by a Monash Faculty of Science Dean's Postgraduate Research Scholarship. This work was funded in part by Australian Research Council Discovery Grants DP0880214 and DP130100177.