title: Post-embryonic root organogenesis in cereals: branching out from model plants.
abstract: The root architecture of higher plants is amazingly diverse. In this review, we compare the lateral root developmental programme in cereals and Arabidopsis thaliana. In cereals, cells in the endodermis are recruited to form the new root cap and overlying cortical cells divide to facilitate the emergence of the lateral root primordium. The TIR1/ABF2 auxin receptors and the AUX/IAA, ARF, and LBD transcriptional regulatory proteins are conserved in cereals and Arabidopsis. Several elements of this regulatory network are common to lateral and crown roots in cereals. Also, the ground meristem from which crown roots differentiate shows similarities with the root pericycle. Studies in cereals promise to give complementary insights into the mechanisms regulating the development of post-embryonic roots in plants.
authors.affiliation: Université catholique de Louvain, Earth and Life Institute, Louvain-la-Neuve, Belgium.
authors.forename: Beata
authors.initials: B
authors.lastname: Orman-Ligeza
authors.forename: Boris
authors.initials: B
authors.lastname: Parizot
authors.forename: Pascal P
authors.initials: PP
authors.lastname: Gantet
authors.forename: Tom
authors.initials: T
authors.lastname: Beeckman
authors.forename: Malcolm J
authors.initials: MJ
authors.lastname: Bennett
authors.forename: Xavier
authors.initials: X
authors.lastname: Draye
mesh_terms: D017360:Arabidopsis / Q000254:growth & development / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D002523:Edible Grain / Q000254:growth & development / Q000502:physiology*; D044783:F-Box Proteins / Q000235:genetics / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D001467:Hordeum / Q000254:growth & development / Q000502:physiology*; D007210:Indoleacetic Acids / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000378:metabolism*; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000502:physiology; D011956:Receptors, Cell Surface / Q000235:genetics / Q000378:metabolism; D036226:Seedlings / Q000254:growth & development / Q000502:physiology; D015398:Signal Transduction; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D003313:Zea mays / Q000254:growth & development / Q000502:physiology*
chemical_list: D029681:Arabidopsis Proteins; D044783:F-Box Proteins; D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D010940:Plant Proteins; D011956:Receptors, Cell Surface; C501405:TIR1 protein, Arabidopsis; D014157:Transcription Factors; C046131:auxin receptor, plant
keywords: barley; cereals; hormones; maize; rice; root system architecture