Leaf direction: Lamina joint development and environmental
Jing Xu1+， Jia-Jia Wang+， Hong-Wei Xue* and Guang-Heng Zhang*
Plant Cell and Environment
10.1111/pce.14065
Abstract
Plant architecture plays a major role in canopy photosynthesis and biomass production,
and plants adjust their growth (and thus architecture) in response to changing
environments. Leaf angle is one of the most important traits in rice (Oryza sativa L.)
plant architecture, because leaf angle strongly affects leaf direction and rice production,
with more-erect leaves being advantageous for high-density plantings. The
degree of leaf bending depends on the morphology of the lamina joint, which connects
the leaf and the sheath. In this review, we discuss cell morphology in different
lamina joint tissues and describe the underlying genetic network that governs this
morphology and thus regulates leaf direction. Furthermore, we focus on the mechanism
by how environmental factors influence rice leaf angle. Our review provides a
theoretical framework for the future genetic improvement of rice leaf orientation
and plant architecture.