This work opens a novel perspective for the study of vascular pattering in crops and its potential impact in the physiology of economically relevant plants.
The characterization of transgenic plants expressing the sunflower transcription factor HaHB4 uncovered a new role for the lateral auxin influx carrier LAX2 in venation patterning and xylem vasculature development. Most of single and multiple mutants for AUX/LAX genes presented an enhanced asymmetry in the venation patterning.
Additionally, Moreno-Piovano et al. show that LAX2 is a negative regulator of xylem vasculature, since the lax2 mutant exhibited increased xylem length and number of xylem cell rows. These results strongly indicated that auxin homeostasis influenced by LAX2 is required to achieve normal vascular development.
Moreno-Piovano, G. S., Moreno, J. E., Cabello, J. V., Arce, A. L., Otegui, M. E., & Chan, R. L. (2017). A role for LAX2 in regulating xylem development and lateral-vein symmetry in the leaf. Annals of Botany, 120(4), 577–590. https://doi.org/10.1093/aob/mcx091
Discover the most popular botany headlines and scientific papers every Monday morning, as chosen by @BotanyOne's Twitter followers.
After signing up, we'll send an email to your inbox to check it is you who wants to sign up to the list. You'll need to click on a link in this email to confirm your subscription. It's our way of making sure we're not accidentally sending you spam.