Deciphering the complex architecture of an herb using micro-computed X-ray tomography, with an illustrated discussion on architectural diversity of herbs

Autor(en)
Guillaume Chomicki, Yannick M. Staedler, Luc P.R. Bidel, Christian Jay-Allemand, Jürg Schönenberger, Susanne S. Renner
Abstrakt

Differing from most animals, plants have an indeterminate body plan, allowing them to add new body parts throughout their lifetime. The realized modular construction of a plant is the result of endogenous processes and exogenous constraints. Plant architectural analysis provides a holistic approach to whole-plant development by disentangling endogenous processes from exogenous constraints. Such analyses have focused more on trees than herbs. We here report a rare growth form discovered in the tropical herb Centella asiatica (Apiaceae) using micro-computed X-ray tomography to understand organogenesis in the meristem. Seeds of C. asiatica germinate to give rise to an orthotropic monochasium (sympodium) with terminal inflorescences. A stolon subsequently emerges from the oldest leaf axils of the sympodium. The primary growth of stolons is indeterminate (monopodial), and they only bear scale leaves. The stolon not only produces new leafy sympodial shoots at each node but also an axillary inflorescence. To place this growth form in context, we illustrate all architectural models so far reported from herbs. Our study highlights the complexity of herb architectures and illustrates the use of a novel methodology to decipher plant branching modes.

Organisation(en)
Department für Botanik und Biodiversitätsforschung
Externe Organisation(en)
Ludwig-Maximilians-Universität München, INRA - Institut national de la recherche agronomique, Université de Montpellier
Journal
Botanical Journal of the Linnean Society
Band
186
Seiten
145-157
Anzahl der Seiten
13
ISSN
0024-4074
DOI
https://doi.org/10.1093/botlinnean/box090
Publikationsdatum
01-2018
Peer-reviewed
Ja
ÖFOS 2012
106042 Systematische Botanik, 106008 Botanik, 106012 Evolutionsforschung
Schlagwörter
ASJC Scopus Sachgebiete
Ecology, Evolution, Behavior and Systematics, Plant Science
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/deciphering-the-complex-architecture-of-an-herb-using-microcomputed-xray-tomography-with-an-illustrated-discussion-on-architectural-diversity-of-herbs(6d6c99e2-d1c7-4437-affd-1cccf559378e).html