FLOWER COLOR INTENSITY DEPENDS ON SPECIALIZED CELL-SHAPE CONTROLLED BY A MYB-RELATED TRANSCRIPTION FACTOR
FLOWER COLOR INTENSITY DEPENDS ON SPECIALIZED CELL-SHAPE CONTROLLED BY A MYB-RELATED TRANSCRIPTION FACTOR
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DOI：
10.1038/369661a0
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发表时间：
1994-06-23
期刊：
影响因子：
64.8
通讯作者：
MARTIN, C
中科院分区：
文献类型：
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作者：
NODA, K;GLOVER, BJ;MARTIN, C
花的颜色主要由色素的产生决定，通常是花青素或类胡萝卜素，但颜色的深浅和强度通常会受到其他因素的影响，如液泡化合物，pH值和金属离子（1，2）。色素沉着也会受到表皮细胞形状的影响，特别是那些面对潜在传粉者的表皮细胞（3，4）。圆锥形被认为增加了进入表皮细胞的入射光的比例，增强了花色素的光吸收，从而增强了它们的颜色强度。我们已经确定了一个基因（mixta），影响金鱼草花瓣表皮细胞色素沉着的强度。在mixta突变体中，花冠叶细胞无法分化成正常的圆锥形。我们已经克隆的mixta基因的转座子标签，其序列显示，它编码的Myb相关的蛋白，可能参与表皮细胞形状的转录控制。
Flower colour is determined primarily by the production of pigments, usually anthocyanins or carotenoids, but the shade and intensity of the colour are often changed by other factors such as vacuolar compounds, pH and metal ions(1,2). Pigmentation can also be affected by the shape of epidermal cells, especially those facing prospective pollinators(3,4). A conical shape is believed to increase the proportion of incident light that enters the epidermal cells, enhancing light absorption by the floral pigments, and thus the intensity of their colour. We have identified a gene (mixta) that affects the intensity of pigmentation of epidermal cells in Antirrhinum majus petals. The cells of the corolla lobes fail to differentiate into their normal conical form in mixta mutants. We have cloned the mixta gene by transposon tagging; its sequence reveals that it encodes a Myb-related protein that probably participates in the transcriptional control of epidermal cell shape.