Necrotic upper tips1 mimics heat and drought stress and encodes a protoxylem-specific transcription factor in maize.

ABSTRACT: Maintaining sufficient water transport during flowering is essential for proper organ growth, fertilization, and yield. Water deficits that coincide with flowering result in leaf wilting, necrosis, tassel browning, and sterility, a stress condition known as "tassel blasting." We identified a mutant, necrotic upper tips1 (nut1), that mimics tassel blasting and drought stress and reveals the genetic mechanisms underlying these processes. The nut1 phenotype is evident only after the floral transition, and the mutants have difficulty moving water as shown by dye uptake and movement assays. These defects are correlated with reduced protoxylem vessel thickness that indirectly affects metaxylem cell wall integrity and function in the mutant. nut1 is caused by an Ac<

SUBMITTER: Dong Z 

PROVIDER: S-EPMC7456077 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature