文章基本信息

标题：Robust control of the seasonal expression of the Arabidopsis FLC gene in a fluctuating environment
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作者：Shinichiro Aikawa ; Masaki J. Kobayashi ; Akiko Satake 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2010
卷号：107
期号：25
页码：11632-11637
DOI：10.1073/pnas.0914293107
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Plants flower in particular seasons even in natural, fluctuating environments. The molecular basis of temperature-dependent flowering-time regulation has been extensively studied, but little is known about how gene expression is controlled in natural environments. Without a memory of past temperatures, it would be difficult for plants to detect seasons in natural, noisy environments because temperature changes occurring within a few weeks are often inconsistent with seasonal trends. Our 2-y census of the expression of a temperature-dependent flowering-time gene, AhgFLC, in a natural population of perennial Arabidopsis halleri revealed that the regulatory system of this flowering-time gene extracts seasonal cues as if it memorizes temperatures over the past 6 wk. Time-series analysis revealed that as much as 83% of the variation in the AhgFLC expression is explained solely by the temperature for the previous 6 wk, but not by the temperatures over shorter or longer periods. The accuracy of our model in predicting the gene expression pattern under contrasting temperature regimes in the transplant experiments indicates that such modeling incorporating the molecular bases of flowering-time regulation will contribute to predicting plant responses to future climate changes.
关键词：Arabidopsis halleri ; FLOWERING LOCUS C ; gene regulation ; natural temperature fluctuation ; plant phenology modeling