Martinez-Zapater J M, Somerville C R
Departamento de Protección Vegetal, CIT-INIA, Apdo 8111, Carretera de la Coruna Km 7, E-28040 Madrid, Spain.
Plant Physiol. 1990 Mar;92(3):770-6. doi: 10.1104/pp.92.3.770.
We have analyzed the response to vernalization and light quality of six classes of late-flowering mutants (fb, fca, fe, fg, ft, and fy) previously isolated following mutagenesis of the early Landsberg race of Arabidopsis thaliana (L.) Heynh. When grown in continuous fluorescent illumination, four mutants (fca, fe, ft, and fy) and the Landsberg wild type exhibited a reduction in both flowering time and leaf number following 6 weeks of vernalization. A significant decrease in flowering time was also observed for all the mutants and the wild type when constant fluorescent illumination was supplemented with irradiation enriched in the red and far red regions of the spectrum. In the most extreme case, the late-flowering phenotype of the fca mutant was completely suppressed by vernalization, suggesting that this mutation has a direct effect on flowering. The fe and fy mutants also showed a more pronounced response than wild type to both vernalization and incandescent supplementation. The ft mutant showed a similar response to that of the wild type. The fb and fg mutants were substantially less sensitive to these treatments. These results are interpreted in the context of a multifactorial pathway for induction of flowering, in which the various mutations affect different steps of the pathway.
我们分析了先前在拟南芥（L.）Heynh的早期Landsberg生态型诱变后分离出的六类晚花突变体（fb、fca、fe、fg、ft和fy）对春化作用和光质的反应。在连续荧光光照下生长时，四个突变体（fca、fe、ft和fy）以及Landsberg野生型在经过6周的春化处理后，开花时间和叶片数量均有所减少。当在持续的荧光光照中补充富含光谱中红光和远红光区域的辐射时，所有突变体和野生型的开花时间也显著缩短。在最极端的情况下，fca突变体的晚花表型被春化作用完全抑制，这表明该突变对开花有直接影响。fe和fy突变体对春化作用和补充白炽灯照射的反应也比野生型更为明显。ft突变体的反应与野生型相似。fb和fg突变体对这些处理的敏感性明显较低。这些结果是在开花诱导的多因素途径的背景下进行解释的，其中各种突变影响该途径的不同步骤。
