Detailing early shoot growth arrest in Kro-0 x BG-5 hybrids of Arabidopsis thaliana

Katelyn Sageman-Furnas, Gustavo Turqueto Duarte, Roosa A.E. Laitinnen

Research outputpeer-review

Abstract

Shoot growth directly impacts plant productivity. Plants adjust their shoot growth in response to varying environments to maximize resource capture and stress resilience. While several factors controlling shoot growth are known, the complexity of the regulation and the input of the environment are not fully understood. We have investigated shoot growth repression induced by low ambient temperatures in hybrids of Arabidopsis thaliana Kro-0 and BG-5 accessions. To continue our previous studies, we confirmed that the Kro-0 allele of DYNAMIN-RELATED PROTEIN 3B causes stunted shoot growth in the BG-5 background. We also found that shoot growth repression was most pronounced near the apex at a lower temperature and that the cells in the hybrid stem failed to elongate correctly. Furthermore, we observed that shoot growth repression in hybrids depended on light availability. Global gene expression analysis indicated the involvement of hormones, especially strigolactone, associated with the dwarf phenotype. Altogether, this study enhances our knowledge on the genetic, physiological and environmental factors associated with shoot growth regulation.

Original languageEnglish
Article numberpcad167
Pages (from-to)420-427
Number of pages8
JournalPlant & Cell Physiology
Volume65
Issue number3
DOIs
StatePublished - 1 Mar 2024

ASJC Scopus subject areas

  • Physiology
  • Plant Science
  • Cell Biology

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