Heat stress suppresses DNA replication and mitosis in barley root apical meristems.

ABSTRACT: Increasing temperature affects plant development, with the assumption that roots are among the tissues particularly sensitive to heat stress (HS). However, a comprehensive analysis of the impact of high temperature on the dynamics of cell cycle and mitosis in barley root cells remains limited. Here, we analyzed barley root growth across a temperature gradient from 15°C to 37°C, encompassing ambient, thermomorphogenic, and HS conditions. Root growth was stimulated by moderately elevated temperatures but arrested at approximately 35°C. HS-changed nuclear architecture parameters, including expanded nuclear area and altered circularity. Although HS led to a temporary mitosis arrest, we demonstrated that DNA replication and mitotic activity were efficiently reinitiated upon recovery at a lower

SUBMITTER: Kaduchova K 

PROVIDER: S-EPMC12695828 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature