RT Journal Article
SR Electronic
T1 Collaboration of multiple pathways in making a compound leaf
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2020.08.19.257550
DO 10.1101/2020.08.19.257550
A1 Alon Israeli
A1 Ori Ben-Herzel
A1 Yogev Burko
A1 Ido Shwartz
A1 Hadas Ben-Gera
A1 Smadar Harpaz-Saad
A1 Maya Bar
A1 Idan Efroni
A1 Naomi Ori
YR 2020
UL http://biorxiv.org/content/early/2020/08/20/2020.08.19.257550.abstract
AB The variability in leaf form in nature is immense. Leaf patterning occurs by differential growth that occurs during a limited window of morphogenetic activity at the leaf marginal meristem. While many regulators have been implicated in the designation of the morphogenetic window and in leaf patterning, how these effectors interact to generate a particular form is still not well understood.We addressed the interaction among different effectors of tomato compound leaf development, using genetic and molecular analyses.Mutations in the tomato auxin response factor SlARF5/SlMP, which promotes leaflet formation, suppressed the increased leaf complexity of mutants with extended morphogenetic window. Impaired activity of the NAC/CUC transcription factor GOBLET (GOB), which specifies leaflet boundaries, also reduced leaf complexity in these backgrounds. Analysis of genetic interactions showed that the patterning factors SlMP, GOB and the MYB transcription factor LYRATE (LYR) act in parallel to promote leaflet formation.This work places an array of developmental regulators in a morphogenetic context. It reveals how organ-level differentiation rate and local growth are coordinated to sculpture an organ. These concepts and findings are applicable to other plant species and developmental processes that are regulated by patterning and differentiation.Competing Interest StatementThe authors have declared no competing interest.