MYB-FL controls gain and loss of floral UV absorbance, a key trait affecting pollinator preference and reproductive isolation
MYB-FL controls gain and loss of floral UV absorbance, a key trait affecting pollinator preference and reproductive isolation
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DOI：
10.1038/ng.3462
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发表时间：
2016-02-01
期刊：
影响因子：
30.8
通讯作者：
Kuhlemeier, Cris
中科院分区：
文献类型：
--
作者：
Sheehan, Hester;Moser, Michel;Kuhlemeier, Cris
对新传粉者的适应涉及多种花卉性状，每一种都需要多个基因的协调变化。尽管存在这种遗传复杂性，但在被子植物进化过程中，授粉综合征的转变经常发生。在这里，我们研究了花的紫外线吸收的遗传基础，这是吸引夜间传粉者的一个关键特征。在矮牵牛中，单一基因MYB-FL的突变可以解释紫外线吸收的两个转变。从蜜蜂授粉到飞蛾传粉的紫外光吸收增强是由顺式调节突变决定的，而移码突变导致了从飞蛾传粉到蜂鸟授粉的随后的紫外光吸收损失。MYB-FL的功能差异为物种形成过程提供了洞察力，并澄清了新生物种之间的系统发育关系。
Adaptations to new pollinators involve multiple floral traits, each requiring coordinated changes in multiple genes. Despite this genetic complexity, shifts in pollination syndromes have happened frequently during angiosperm evolution. Here we study the genetic basis of floral UV absorbance, a key trait for attracting nocturnal pollinators. In Petunia, mutations in a single gene, MYB-FL, explain two transitions in UV absorbance. A gain of UV absorbance in the transition from bee to moth pollination was determined by a cis-regulatory mutation, whereas a frameshift mutation caused subsequent loss of UV absorbance during the transition from moth to hummingbird pollination. The functional differences in MYB-FL provide insight into the process of speciation and clarify phylogenetic relationships between nascent species.