PHOTOPERIOD 1 enhances stress resistance and energy metabolism to promote spike fertility in barley under high ambient temperatures.

ABSTRACT: High ambient temperature (HT) impairs reproductive development and grain yield in temperate crops. To ensure reproductive success under HT, plants must maintain developmental stability. However, the mechanisms integrating plant development and temperature resistance are largely unknown. Here, we demonstrate that PHOTOPERIOD 1 (PPD-H1), homologous to PSEUDO RESPONSE REGULATOR genes of the Arabidopsis (Arabidopsis thaliana) circadian clock, controls developmental stability in response to HT in barley (Hordeum vulgare). We analyzed the HT responses in independent introgression lines with either the ancestral wild-type Ppd-H1 allele or the natural ppd-h1 variant, selected in spring varieties to delay flowering and enhance yield under favorable conditions. HT delayed inflorescence development a

SUBMITTER: Lan T 

PROVIDER: S-EPMC12002028 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature