FACTORS INFLUENCING THE VERNALIZATION RESPONSE AND FLOWERING TIME OF LATE FLOWERING MUTANTS OF ARABIDOPSIS-THALIANA (L) HEYNH
FACTORS INFLUENCING THE VERNALIZATION RESPONSE AND FLOWERING TIME OF LATE FLOWERING MUTANTS OF ARABIDOPSIS-THALIANA (L) HEYNH
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DOI：
10.1093/jxb/45.9.1279
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发表时间：
1994-09-01
影响因子：
6.9
通讯作者：
DEAN, C
中科院分区：
文献类型：
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作者：
CHANDLER, J;DEAN, C
拟南芥晚花突变体为研究花诱导和春化反应的控制因素提供了一个很好的系统。先前对这些突变体的研究分析了它们对春化持续时间的反应，以及在不同光照条件下的生长。此外，我们还研究了植株年龄对春化反应的影响以及不同光照条件对春化处理的影响。分析了野生型直立兰花（Ler）和携带fca（春化响应型，日长响应型）或cc（日长不敏感型，春化不敏感型）突变的系。Ler、fca和co在不同株龄对春化的响应在质量上是相同的，但在程度和时间上存在差异。在Ler中，fca和co春化在黑暗中比在短白天（SD）更有效；或者连续的光。这一系列的晚开花突变体被用来检验一些先前被证明会影响开花的化合物的影响。赤霉素A(3)和5-溴脱氧尿苷加速了所有突变体的开花，并添加到fca春化处理中。fca突变体对赤霉素的反应范围与Ler相同，但程度更大。氯化胆碱延迟开花，但在大多数春化反应突变体中，这种效应被春化逆转。没有一种突变体表现出对任何特定化合物的特异性反应丧失。
The late flowering mutants of Arabidopsis thaliana provide an excellent system to investigate the factors controlling floral induction and the vernalization response. Previous studies with these mutants have analysed their response to the duration of vernalization, and growth in different light conditions. Mere, we examined the effect of plant age on the vernalization response and the influence of different light conditions during the vernalization treatment. Wild type Landsberg erecta (Ler) and lines carrying the fca (classified as vernalization responsive, daylength responsive) or cc (classified as daylength insensitive, vernalization insensitive) mutations were analysed. The response to vernalization at different plant ages was qualitatively the same for Ler, fca, and co, but differed in degree and timing. In Ler, fca and co vernalization was more effective in darkness than in short days (SD); or continuous light.The series of late flowering mutants were used to examine the effects of a number of compounds previously shown to influence flowering. Gibberellin A(3) and 5-bromodeoxyuridine accelerated flowering for all the mutants analysed, and were additive to a vernalization treatment for fca. The fca mutant responded to the same range of gibberellins as Ler, but to a greater degree. Choline chloride delayed flowering, but this effect was reversed by vernalization in most of the vernalization-responsive mutants. None of the mutants showed a specific loss of response to any particular compound.