title: Going mainstream: How is the body axis of plants first initiated in the embryo?
abstract: Vascular plants have an open body plan and continuously generate new axes of growth, such as shoot or root branches. Apical-to-basal transport of the hormone auxin is a hallmark of every axis, and the resulting pattern of auxin distribution affects plant development across scales, from overall architecture to cellular differentiation. How the first axis is initiated in the early embryo is a long-standing question. While our knowledge is still sparse, some of the key players of axialization have emerged, and recent work points to specific models for connecting cellular polarity to the asymmetric division of the zygote and domain specific gene expression to the organization of basipetal auxin flux.
authors.affiliation: Department of Plant Biology, University of Georgia, 120 Carlton Street, Athens, GA 30602-7271, United States. Electronic address: sjeong@uga.edu.
authors.forename: Sangho
authors.initials: S
authors.lastname: Jeong
authors.affiliation: Department of Plant Biology, University of Georgia, 120 Carlton Street, Athens, GA 30602-7271, United States. Electronic address: emily.eilbert25@uga.edu.
authors.forename: Emily
authors.initials: E
authors.lastname: Eilbert
authors.affiliation: Botany Department, Faculty of Science, Zagazig University, 44519 Sharkira, Egypt. Electronic address: abolbol76@googlemail.com.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Bolbol
authors.affiliation: Department of Plant Biology, University of Georgia, 120 Carlton Street, Athens, GA 30602-7271, United States. Electronic address: lukowitz@uga.edu.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Lukowitz
mesh_terms: D017360:Arabidopsis / Q000196:embryology / Q000235:genetics / Q000254:growth & development; D029681:Arabidopsis Proteins / Q000502:physiology; D002455:Cell Division; D016764:Cell Polarity; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D007210:Indoleacetic Acids; D063245:Plant Development; D010944:Plants / Q000196:embryology* / Q000235:genetics; D014157:Transcription Factors / Q000502:physiology; D015053:Zygote
chemical_list: D029681:Arabidopsis Proteins; D007210:Indoleacetic Acids; D014157:Transcription Factors
keywords: Apical-basal axis; Asymmetric division; Auxin transport; EPF; Embryogenesis; GRD/RKD4; MAP-kinase cascade; Plant development; Polarity; SSP; Suspensor; WOX8; WRKY2; YDA; Zygote