A HD-ZIP III gene, PtrHB4, is required for interfascicular cambium development in Populus.

ABSTRACT: Wood production is dependent on the activity of the vascular cambium, which develops from the fascicular and interfascicular cambia. However, little is known about the mechanisms controlling how the vascular cambium is developed in woody species. Here, we show that PtrHB4, belonging to the Populus HD-ZIP III family, plays a critical role in the process of vascular cambium development. PtrHB4 was specifically expressed in shoot tip and stem vascular tissue at an early developmental stage. Repression of PtrHB4 caused defects in the development of the secondary vascular system due to failures in interfascicular cambium formation. By contrast, overexpression of PtrHB4 induced cambium activity and xylem differentiation during secondary vascular development. Transcriptional analysis of PtrHB4 re

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC5814583 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature