Transcriptional Regulators of Suberin Biosynthesis in Arabidopsis thaliana

Abstract

Like all vascular plants, the root endodermis of Arabidopsis thaliana contains aliphatic suberin, a cell wall-associated hydrophobic polymer that helps direct the symplastic movement of water and solutes into the central vasculature. The enzymes involved in suberin biosynthesis are relatively well characterized, but there are many gaps in our knowledge on how suberin biosynthesis is regulated. In this study, I demonstrate that Arabidopsis MYB41, MYB53, MYB92, and MYB93, which are R2R3 MYBtype transcription factors, can activate the transcription of suberin biosynthesis genes through their promoter (region 5' of the translation start site). Using a promoter: reporter deletion series, two regions 5-REFERENCES ..