Leafbladeless1 is required for dorsoventrality of lateral organs in maize

• DOI: 10.1242/dev.125.15.2813
• Publication Date: 2021-04-26T03:20:04Z
• Authors: Marja C. P. Timme...; Neil P. Schultes; Julia P. Jankovsky; Timothy Nelson
• Keywords: Homeodomain Proteins; 0301 basic medicine; Models, Genetic; Meristem; Genes, Homeobox; Gene Expression Regulation, Developmental; Cell Differentiation; Genes, Recessive; Genes, Plant; Zea mays; Plant Leaves; 03 medical and health sciences; Mutation; Morphogenesis; Alleles; Body Patterning; Plant Proteins

ABSTRACT The maize leafbladeless1 (lbl1) mutant displays a variety of leaf and plant phenotypes. most extreme manifestation in the is formation radially symmetric, abaxialized leaves due to complete loss adaxial cell types. Less severe phenotypes, resulting from partial identity, include ectopic laminae at boundary between abaxialized, sectors on surface bifurcation leaves. Ectopic bifurcations arise early development result an altered patterning along proximodistal axis, or duplication developing organ. Leaf-like lateral organs inflorescences flowers show similar These observations suggest that Lbl1 required for specification identity within leaflike organs. also propagation founder recruitment, plays direct indirect role downregulation homeobox gene, knotted1, during development. Our results adaxial/abaxial asymmetry specified shoot apical meristem, this axis essential marginal, growth points growth. Parallels events organ plants animals are discussed.