EAF1 Regulates Vegetative-Phase Change and Flowering Time in Arabidopsis1

Autor:	Derek B. Scott, Hou-Sung Jung, Mary Honma, Wei Jin, Heidi K. Ledford
Rok vydání:	1999
Předmět:	Phytochrome Physiology Mutant Wild type food and beverages Locus (genetics) Plant Science Biology biology.organism_classification Paclobutrazol Vegetative phase change chemistry.chemical_compound chemistry Arabidopsis Botany Genetics Gibberellin
Zdroj:	Plant Physiology. 120:675-684
ISSN:	1532-2548 0032-0889
DOI:	10.1104/pp.120.3.675
Popis:	We have identified a new locus that regulates vegetative phase change and flowering time in Arabidopsis. An early-flowering mutant, eaf1(earlyflowering1) was isolated and characterized.eaf1 plants flowered earlier than the wild type under either short-day or long-day conditions, and showed a reduction in the juvenile and adult vegetative phases. When grown under short-day conditions, eaf1 plants were slightly pale green and had elongated petioles, phenotypes that are observed in mutants altered in either phytochrome or the gibberellin (GA) response.eaf1 seed showed increased resistance to the GA biosynthesis inhibitor paclobutrazol, suggesting that GA metabolism and/or response had been altered. Comparison of eaf1 to other early-flowering mutants revealed that eaf1 shifts to the adult phase early and flowers early, similarly to thephyB(phytochromeB) and spy(spindly) mutants. eaf1 maps to chromosome 2, but defines a locus distinct from phyB, clf(curlyleaf), and elf3(early-flowering3). These results demonstrate thateaf1 defines a new locus involved in an autonomous pathway and may affect GA regulation of flowering.
Databáze:	OpenAIRE
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