OsARF4 regulates leaf inclination via auxin and brassinosteroid pathways in rice.

ABSTRACT: Leaf inclination is a vital agronomic trait and is important for plant architecture that affects photosynthetic efficiency and grain yield. To understand the molecular mechanisms underlying regulation of leaf inclination, we constructed an auxin response factor (arf) rice mutant-osarf4-showing increased leaf inclination using CRISPR/Cas9 gene editing technology. OsARF4 encodes a nuclear protein that is expressed in the lamina joint (LJ) at different developmental stages in rice. Histological analysis indicated that an increase in cell differentiation on the adaxial side resulted in increased leaf inclination in the osarf4 mutants; however, OsARF4-overexpressing lines showed a decrease in leaf inclination, resulting in erect leaves. Additionally, a decreas

SUBMITTER: Qiao J 

PROVIDER: S-EPMC9561258 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature