Dynamic Phytomeric Growth Contributes to Local Adaptation in Barley.

ABSTRACT: Vascular plants have segmented body axes with iterative nodes and internodes. Appropriate node initiation and internode elongation are fundamental to plant fitness and crop yield; however, how these events are spatiotemporally coordinated remains elusive. We show that in barley (Hordeum vulgare L.), selections during domestication have extended the apical meristematic phase to promote node initiation, but constrained subsequent internode elongation. In both vegetative and reproductive phases, internode elongation displays a dynamic proximal-distal gradient, and among subpopulations of domesticated barleys worldwide, node initiation and proximal internode elongation are associated with latitudinal and longitudinal gradients, respectively. Genetic and functional analyses suggest that, in add

SUBMITTER: Huang Y 

PROVIDER: S-EPMC10837018 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature