Arabidopsis thaliana homeodomain-leucine zipper type I transcription factors contribute to control leaf venation patterning.

MORENO, JAVIER E.; ROMANI, FACUNDO; CHAN, RAQUEL L.

Plant Signaling & Behavior

Taylor and Francis

Año: 2018 p. 1 - 11

Venation patterning is a taxonomic attribute for classification of plantsand it also plays a role in the interaction of plants with the environment.Despite its importance, the molecular physiology controlling this aspect ofplant development is still poorly understood. Auxin plays a central role modulatingthe final vein network and patterning. This addendum discusses recent findingson the role of homeodomain-leucine zipper (HD-Zip) transcription factors on theregulation of leaf venation patterning. Moreno-Piovano et al. reported that ectopic expression of a sunflower HD-Zip I gene, HaHB4, increased the asymmetry of leaf venation. Even more, this workshowed that auxin transport in the leaf through LAX carriers controls venationpatterning. Here, we provide evidence indicating that some Arabidopsis thaliana HD-Zip I genes play a role in thedetermination of the final leaf venation patterning. We propose that these genescontribute to regulate vein patterning, likely controlling auxin homeostasis.