Growth-limiting drought stress induces time-of-day-dependent transcriptome and physiological responses in hybrid poplar.

ABSTRACT: Drought stress negatively impacts the health of long-lived trees. Understanding the genetic mechanisms that underpin response to drought stress is requisite for selecting or enhancing climate change resilience. We aimed to determine how hybrid poplars respond to prolonged and uniform exposure to drought; how responses to moderate and more severe growth-limiting drought stresses differed; and how drought responses change throughout the day. We established hybrid poplar trees (Populus × 'Okanese') from unrooted stem cutting with abundant soil moisture for 6 weeks. We then withheld water to establish well-watered, moderate and severe growth-limiting drought conditions. These conditions were maintained for 3 weeks during which growth was monitored. We then measured photosynthetic rates

SUBMITTER: Robertson SM 

PROVIDER: S-EPMC9521483 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature