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Expression pattern of CYC-like genes relating to a dorsalized actinomorphic flower in Tengia(Gesneriaceae)

Journal of Systematics and Evolution 2010年第5期48卷 309-317页

作者： 1Hong-Bo PANG 2Qing-Wen SUN 2Shun-Zhi HE 1Yin-Zheng WANG 1(State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China) 2(Guiyang College of Traditional Chinese Medicine,Guiyang 550002,China) (State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China) (Guiyang College of Traditional Chinese Medicine Guiyang 550002 China)

Tengia has been called a "natural peloria" in the family Gesneriaceae because it exhibits an almost perfect actinomorphic flower from whorl one to whorl *** would be especially interesting to know whether or how CYC-like gene activities are related to this type of perfect actinomorphic *** address this,we have isolated four CYC-like TCP genes and carried out an investigation on their expression patterns in ***1C and TsCYC1D have similar expression patterns with strong signals being detected in all five petals and stamens,whereas TsCYC2A and TsCYC2B are only transiently expressed in the very early floral *** results suggest that the expansion of the expressions of TsCYC1C and TsCYC1D from the dorsal to the ventral petals is likely responsible for the evolutionary formation of the fully dorsalized actinomorphic corolla,that is,an expanded functional domain of CYC-like gene dorsal identity in Tengia ***,the expressions of TsCYC1C and TsCYC1D are not correlated with stamen abortion;therefore,TsCYC genes do not functionally repress the stamen development in Tengia *** is probably due to changed cis-activities that result in the cell cycle-related genes uncoupling from the TsCYC regulatory pathway in Tengia.

关键词： actinomorphy CYCLOIDEA dorsalized Gesneriaceae RNA in situ hybridization Tengia.

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