Regulation of xylem fiber differentiation by gibberellins through DELLA-KNAT1 interaction

Our analysis indicates that at least 37% of the transcriptome mobilized by KNAT1 is potentially dependent on this interaction, and includes genes involved in secondary cell wall modifications and phenylpropanoid biosynthesis. Overall design: Seven-day-old Arabidopsis wild-type (No-0) and 35S::KNAT1 seedlings growing in MS plates under continuous light were transferred to a liquid growing medium supplemented with 10 µM paclobutrazol (PAC) for 18 h. Seedlings were then incubated with 10 µM PAC+100 µM GA3 or maintained in 10 µM PAC for 5 h.

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Felipo-Benavent A, Úrbez C, Blanco-Touriñán N, Serrano-Mislata A, Baumberger N, Achard P, Agustí J, Blázquez MA, Alabadí D