The molecular basis of diversity in the photoperiodic flowering responses of Arabidopsis and rice
The molecular basis of diversity in the photoperiodic flowering responses of Arabidopsis and rice
复制标题
DOI：
10.1104/pp.104.042614
复制
发表时间：
2004-06-01
期刊：
影响因子：
7.4
通讯作者：
Coupland, G
中科院分区：
文献类型：
--
作者：
Hayama, R;Coupland, G
一天长短的波动影响许多生物的发育过程和行为。哺乳动物和鸟类在春天繁殖，以应对白天的延长，昆虫在秋天化蛹，当日照缩短。这些现象称为光周期现象，可以检测季节变化和预测环境条件，如低温和干燥。1920年，Garner和Allard首次详细描述了光周期现象，证明许多植物会对日照长度的变化做出反应（Garner和Allard，1920）。随后，他们表明，当日照福尔斯低于临界日照时，一些植物物种会促进开花，而其他植物则会加速开花，以应对超过临界日照的日照。这些植物分别被称为短日（SD）和长日（LD）植物。在过去的十年中，分子遗传学的方法被应用于理解开花时间的控制，主要是在LD植物拟南芥，并在确定拟南芥识别日长和促进开花的分子机制，特别是在LD下取得了显着进展。此外，最近在水稻的遗传研究，使在这个SD植物的日长反应的机制进行比较与拟南芥。在此，我们回顾了近年来在了解拟南芥开花日长响应调节机制方面的进展，并将其与水稻进行了比较。
Fluctuations in the length of the day affect developmental processes and behaviors of many organisms. Mammals and birds reproduce in spring in response to lengthening days and insects pupate in autumn when daylength shortens. These phenomena, called photoperiodism, allow detection of seasonal changes and anticipation of environmental conditions such as low temperatures and desiccation. Photoperiodism was first described in detail by Garner and Allard in 1920 through the demonstration that many plants flower in response to changes in daylength (Garner and Allard, 1920). Subsequently, they showed that some plant species promote flowering when daylength falls below a critical daylength, whereas other plants accelerate flowering in response to daylengths longer than a critical daylength. These plants are called short-day (SD) and long-day (LD) plants, respectively. During the last decade, molecular-genetic approaches were applied to understanding the control of flowering time, mainly in the LD plant Arabidopsis, and notable progress has been made in identifying the molecular mechanisms by which Arabidopsis recognizes daylength and promotes flowering specifically under LDs. Also, recent genetic studies in rice enabled the mechanisms of the daylength response in this SD plant to be compared with those of Arabidopsis. Here we review the recent advances in understanding the regulatory mechanisms for daylength response of flowering in Arabidopsis and compare them with those of rice.