AMP1 - A MUTANT WITH HIGH CYTOKININ LEVELS AND ALTERED EMBRYONIC PATTERN, FASTER VEGETATIVE GROWTH, CONSTITUTIVE PHOTOMORPHOGENESIS AND PRECOCIOUS FLOWERING
AMP1 - A MUTANT WITH HIGH CYTOKININ LEVELS AND ALTERED EMBRYONIC PATTERN, FASTER VEGETATIVE GROWTH, CONSTITUTIVE PHOTOMORPHOGENESIS AND PRECOCIOUS FLOWERING
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DOI：
10.1046/j.1365-313x.1993.04060907.x
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发表时间：
1993-12-01
期刊：
影响因子：
7.2
通讯作者：
DENNIS, ES
中科院分区：
文献类型：
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作者：
CHAUDHURY, AM;LETHAM, S;DENNIS, ES
拟南芥突变体amp1在植物发育的空间格局、光形态发生生长和开花起始三个不同方面具有表型改变。野生型植物的幼苗中只有不到0.1%是非双子叶植物，而amp1突变体的幼苗中多达20%是特里科或四分叶植物。amp1的叶片分化速度快，营养叶序发生改变。当在黑暗中生长时，amp1幼苗表现出与光生长的野生型植物相似的形态发生特性：它们不形成顶端钩，具有比野生型植物短的下胚轴，并形成黄化的真叶。Amp 1突变体开花时间显著早于同类Amp 1植株。突变体的细胞分裂素比野生型多6倍，这表明内源性细胞分裂素水平可能在介导这些不同的发育过程中发挥重要作用。AMP 1可能编码细胞分裂素生物合成的负调节因子，或者可能是细胞分裂素降解所需的。
amp1, a mutant of Arabidopsis thaliana has a phenotype altered in three different aspects of plant development; spatial pattern, photomorphogenetic growth, and initiation of flowering. While fewer than 0.1% of the seedlings of wild-type plants are non-dicot as many as 20% of the seedlings of the amp1 mutant are tricot or tetracot. The rate of leaf initiation is faster and vegetative phyllotaxy is altered in amp1. When grown in the dark amp1 seedlings show morphogenetic properties similar to light-grown wild-type plants: they do not form an apical hook, have hypocotyls shorter than wild-type plants and form etiolated true leaves. amp1 mutant flowers significantly earlier than congenic Amp1 plants. The mutant has six times more cytokinin than wild-type suggesting that endogenous cytokinin levels might play an important role in mediating these different developmental processes. AMP1 might code for a negative regulator of cytokinin biosynthesis, or may be required for the degradation of cytokinin.