CO/FT regulatory module controls timing of flowering and seasonal growth cessation in trees
CO/FT regulatory module controls timing of flowering and seasonal growth cessation in trees
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DOI：
10.1126/science.1126038
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发表时间：
2006-05-19
期刊：
影响因子：
56.9
通讯作者：
Nilsson, O
中科院分区：
文献类型：
--
作者：
Böhlenius, H;Huang, T;Nilsson, O
森林树木表现出一种常年生长行为，其特征是开花延迟多年，在温带地区，生长和休眠之间存在年度循环。我们在这里展示了CO/FT调节模块，它控制开花时间以响应一年生植物日长的变化，控制杨树的开花。然而，出乎意料的是，它还控制了短日照诱导的生长停止和秋季发生的芽形成。这种调节机制可以解释一种高度适应性特征的生态变异：横跨北欧纬度梯度的杨树显示出停止生长的临界日长。
Forest trees display a perennial growth behavior characterized by a multiple-year delay in flowering and, in temperate regions, an annual cycling between growth and dormancy. We show here that the CO/FT regulatory module, which controls flowering time in response to variations in daylength in annual plants, controls flowering in aspen trees. Unexpectedly, however, it also controls the short-day-induced growth cessation and bud set occurring in the fall. This regulatory mechanism can explain the ecogenetic variation in a highly adaptive trait: the critical daylength for growth cessation displayed by aspen trees sampled across a latitudinal gradient spanning northern Europe.