Ectopic endoreduplication caused by sterol alteration results in serrated petals in Arabidopsis
Ectopic endoreduplication caused by sterol alteration results in serrated petals in Arabidopsis
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DOI：
10.1093/jxb/eri122
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发表时间：
2005-04-01
影响因子：
6.9
通讯作者：
Tanaka, A
中科院分区：
文献类型：
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作者：
Hase, Y;Fujioka, S;Tanaka, A
研究人员对拟南芥 frill1 (frl1) 突变体进行了研究，该突变体具有锯齿状花瓣和萼片，但植物形态没有其他大的变化。 frl1 的甾醇甲基转移酶 2 发生突变，甾醇组成也发生改变。研究发现，frl1 突变会导致花瓣尖端发生异位内复制，而花瓣尖端通常不进行内复制。 frl1的莲座叶也表现出核内复制水平的增强，但其形态几乎没有受到影响。这些事实表明，内复制的抑制对于花瓣形态发生很重要，并且这种抑制需要正常的甾醇组成。
The Arabidopsis frill1 (frl1) mutant, that has serrated petals and sepals but no other large changes in plant morphology, was studied. The frl1 had a mutation in STEROL METHYLTRANSFERASE 2 and an altered sterol composition. It was found that the frl1 mutation causes ectopic endoreduplication in petal tips that do not normally endoreduplicate. The rosette leaves of frl1 also showed an enhanced level of endoreduplication, but their morphology was hardly affected. These facts suggest that the suppression of endoreduplication is important for petal morphogenesis and the normal sterol composition is required for this suppression.