BREVIPEDICELLUS/KNAT1 targets TCP15 to modulate filament elongation during Arabidopsis late stamen development

MANSILLA, NATANAEL; LUCERO, LEANDRO E; ALEM, ANTONELA ; VIOLA, IVANA L; GASTALDI, VICTORIA; ARIEL, FEDERICO D; GONZALEZ, DANIEL H

PLANT PHYSIOLOGY.

AMER SOC PLANT BIOLOGISTS

Lugar: Rockville; Año: 2022

0032-0889

Dear Editor,Stamen filament elongation is a strictly controlled process, crucial for efficient self-pollination in autogamous plants. In Arabidopsis (Arabidopsis thaliana), stamen primordia emergence is followed by differentiation of filaments and anthers around Stage 7 of flower development and by fast filament elongation during Stages 10?13, when the flower opens (Smyth et al., 1990; Cardarelli and Cecchetti, 2014). The repression of genes encoding Class I KNOX homeodomain transcription factors at early stages of flower development is necessary for correct stamen development in Arabidopsis (Tabata et al., 2010; Rubio-Somoza and Weigel, 2013). A literature survey, however, indicated that the promoter of the Class I KNOX gene KNOTTED1-LIKE in ARABIDOPSIS THALIANA1 (KNAT1), also named BREVIPEDICELLUS (BP; Venglat et al., 2002), is active in elongated stamen filaments (Ori et al., 2000; Wang et al., 2006), raising the possibility of an additional role of this transcription factor during late stamen development.