Three ancient hormonal cues co-ordinate shoot branching in a moss. Coudert, Y., Palubicki, W., Ljung, K., Novak, O., Leyser, O., & Harrison, C. J. Elife, 4:e06808, March, 2015. Edition: 2015/03/26![Three ancient hormonal cues co-ordinate shoot branching in a moss [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Shoot branching is a primary contributor to plant architecture, evolving independently in flowering plant sporophytes and moss gametophytes. Mechanistic understanding of branching is largely limited to flowering plants such as Arabidopsis, which have a recent evolutionary origin. We show that in gametophytic shoots of Physcomitrella, lateral branches arise by re-specification of epidermal cells into branch initials. A simple model co-ordinating the activity of leafy shoot tips can account for branching patterns, and three known and ancient hormonal regulators of sporophytic branching interact to generate the branching pattern- auxin, cytokinin and strigolactone. The mode of auxin transport required in branch patterning is a key divergence point from known sporophytic pathways. Although PIN-mediated basipetal auxin transport regulates branching patterns in flowering plants, this is not so in Physcomitrella, where bi-directional transport is required to generate realistic branching patterns. Experiments with callose synthesis inhibitors suggest plasmodesmal connectivity as a potential mechanism for transport.
@article{coudert_three_2015,
title = {Three ancient hormonal cues co-ordinate shoot branching in a moss},
volume = {4},
issn = {2050-084X (Electronic) 2050-084X (Linking)},
url = {https://www.ncbi.nlm.nih.gov/pubmed/25806686},
doi = {10.7554/eLife.06808},
abstract = {Shoot branching is a primary contributor to plant architecture, evolving independently in flowering plant sporophytes and moss gametophytes. Mechanistic understanding of branching is largely limited to flowering plants such as Arabidopsis, which have a recent evolutionary origin. We show that in gametophytic shoots of Physcomitrella, lateral branches arise by re-specification of epidermal cells into branch initials. A simple model co-ordinating the activity of leafy shoot tips can account for branching patterns, and three known and ancient hormonal regulators of sporophytic branching interact to generate the branching pattern- auxin, cytokinin and strigolactone. The mode of auxin transport required in branch patterning is a key divergence point from known sporophytic pathways. Although PIN-mediated basipetal auxin transport regulates branching patterns in flowering plants, this is not so in Physcomitrella, where bi-directional transport is required to generate realistic branching patterns. Experiments with callose synthesis inhibitors suggest plasmodesmal connectivity as a potential mechanism for transport.},
language = {en},
urldate = {2021-06-07},
journal = {Elife},
author = {Coudert, Y. and Palubicki, W. and Ljung, K. and Novak, O. and Leyser, O. and Harrison, C. J.},
month = mar,
year = {2015},
note = {Edition: 2015/03/26},
keywords = {Biological Transport/drug effects, Body Patterning/drug effects, Bryopsida/drug effects/*growth \& development, Cytokinins/biosynthesis, Gene Expression Regulation, Plant/drug effects, Indoleacetic Acids/metabolism/pharmacology, Lactones/pharmacology, Models, Biological, Morphogenesis/*drug effects, Mutation/genetics, Physcomitrella, Plant Epidermis/cytology/growth \& development, Plant Growth Regulators/*pharmacology, Plant Proteins/metabolism, Plant Shoots/drug effects/*growth \& development, Plants, Genetically Modified, apical dominance, branching, developmental biology, gametophyte, plant biology, stem cells},
pages = {e06808},
}
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