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Ethylene Interacts with Abscisic Acid to Regulate Endosperm Rupture during Germination: A Comparative Approach Using Lepidium sativum and Arabidopsis thaliana
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SYSNO ASEP 0340951 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ethylene Interacts with Abscisic Acid to Regulate Endosperm Rupture during Germination: A Comparative Approach Using Lepidium sativum and Arabidopsis thaliana Author(s) Linkies, A. (DE)
Müller, L. (DE)
Morris, K. (GB)
Turečková, Veronika (UEB-Q) RID, ORCID
Wenk, M. (DE)
Cadman, C. S. C. (GB)
Corbineau, F. (FR)
Strnad, Miroslav (UEB-Q) RID, ORCID
Lynn, J. R . (GB)
Finch-Savage, W. E. (GB)
Leubner-Metzger, G. (DE)Source Title Plant Cell. - : Oxford University Press - ISSN 1040-4651
Roč. 21, č. 12 (2009), s. 3803-3822Number of pages 20 s. Language eng - English Country US - United States Keywords SEED DORMANCY RELEASE ; GIBBERELLIN BIOSYNTHESIS ; FEEDBACK-REGULATION Subject RIV EF - Botanics CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000274196000009 DOI 10.1105/tpc.109.070201 Annotation The micropylar endosperm cap covering the radicle in the mature seeds of most angiosperms acts as a constraint that regulates seed germination. Here, we report on a comparative seed biology study with the close Brassicaceae relatives Lepidium sativum and Arabidopsis thaliana showing that ethylene biosynthesis and signaling regulate seed germination by a mechanism that requires the coordinated action of the radicle and the endosperm cap. The larger seed size of Lepidium allows direct tissue-specific biomechanical, biochemical, and transcriptome analyses. We show that ethylene promotes endosperm cap weakening of Lepidium and endosperm rupture of both species and that it counteracts the inhibitory action of abscisic acid (ABA) on these two processes. Cross-species microarrays of the Lepidium micropylar endosperm cap and the radicle show that the ethylene-ABA antagonism involves both tissues and has the micropylar endosperm cap as a major target. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2010
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