Changes in hormone flux and signaling in white spruce (Picea glauca) seeds during the transition from dormancy to germination in response to temperature cues

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• 作者：Yang Liu ; Kerstin Müller ; Yousry A. El-Kassaby ; Allison R. Kermode
• 关键词：Seed dormancy ; Auxin ; ABA ; GAs ; Moist ; chilling ; Seed germination ; White spruce
• 刊名：BMC Plant Biology
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：15
• 期：1
• 全文大小：1,574 KB
• 刊物主题：Plant Sciences; Agriculture; Tree Biology;
• 出版者：BioMed Central
• ISSN：1471-2229

文摘

Background Seeds use environmental cues such as temperature to coordinate the timing of their germination, allowing plants to synchronize their life history with the seasons. Winter chilling is of central importance to alleviate seed dormancy, but very little is known of how chilling responses are regulated in conifer seeds. White spruce (Picea glauca) is an important conifer species of boreal forests in the North American taiga. The recent sequencing and assembly of the white spruce genome allows for comparative gene expression studies toward elucidating the molecular mechanisms governing dormancy alleviation by moist chilling. Here we focused on hormone metabolite profiling and analyses of genes encoding components of hormone signal transduction pathways, to elucidate changes during dormancy alleviation and to help address how germination cues such as temperature and light trigger radicle emergence.