Number of the records: 1
Three ancient hormonal cues co-ordinate shoot branching in a moss
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SYSNO ASEP 0446640 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Three ancient hormonal cues co-ordinate shoot branching in a moss Author(s) Coudert, Y. (GB)
Palubicki, W. (GB)
Ljung, K. (SE)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Leyser, O. (GB)
Harrison, C.J. (GB)Source Title eLife. - : eLife - ISSN 2050-084X
Roč. 4, MAR 25 (2015)Number of pages 26 s. Language eng - English Country GB - United Kingdom Keywords EARLY LAND PLANTS ; AUXIN TRANSPORT ; APICAL DOMINANCE Subject RIV EB - Genetics ; Molecular Biology R&D Projects LO1204 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UEB-Q - RVO:61389030 UT WOS 000351867100006 DOI 10.7554/eLife.06808 Annotation 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 (gametophore) 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 branching 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. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2016
Number of the records: 1