FIDDLEHEAD - AN ARABIDOPSIS MUTANT CONSTITUTIVELY EXPRESSING AN ORGAN FUSION PROGRAM THAT INVOLVES INTERACTIONS BETWEEN EPIDERMAL-CELLS
FIDDLEHEAD - AN ARABIDOPSIS MUTANT CONSTITUTIVELY EXPRESSING AN ORGAN FUSION PROGRAM THAT INVOLVES INTERACTIONS BETWEEN EPIDERMAL-CELLS
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DOI：
10.1016/0012-1606(92)90145-7
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发表时间：
1992-08-01
影响因子：
2.7
通讯作者：
SUSSEX, IM
中科院分区：
文献类型：
--
作者：
LOLLE, SJ;CHEUNG, AY;SUSSEX, IM
在大多数情况下，植物表皮细胞对与邻近植物部分的表面接触没有反应。我们已经鉴定并描述了拟南芥的一个突变体，命名为fiddlehead，其中茎的侧枝相互融合。虽然花器官之间的融合是最常见的，叶融合也发生。使用扫描和透射电子显微镜，我们发现粘附发生在表皮细胞之间，不涉及细胞质结合。我们还表明，器官融合的频率是由器官接近决定的。在野生型拟南芥中，遗传后融合只发生在雌蕊中，而在fiddleheadmutant中，该程序被组成性地表达。这种突变体的存在表明，生殖后融合是一种遗传上独特的程序，叠加在拟南芥雌蕊发育的其他方面。
In most circumstances plant epidermal cells do not respond to surface contact with adjacent plant parts. We have identified and characterized a mutant ofArabidopsis thaliana, designatedfiddlehead, where lateral appendages of the shoot fuse with one another. While fusion between floral organs is most frequent, leaf fusions also occur. Using scanning and transmission electron microscopy, we show that adhesion takes place between epidermal cells and does not involve cytoplasmic union. We also show that the frequency of organ fusion is dictated by organ proximity. In wildtypeArabidopsis, postgential fusion takes place exclusively in the gynoecium, whereas in thefiddleheadmutant, this program becomes expressed constitutively. The existence of such a mutant demonstrates that postgenital fusion is a genetically distinct program superimposed upon other aspects of gynoecial development inArabidopsis.