Assessing Transcriptional Responses to Light by the Dinoflagellate Symbiodinium

文献类型： 外文期刊

第一作者： Zaheri, Bahareh

作者： Zaheri, Bahareh;Dagenais-Bellefeuille, Steve;Morse, David;Song, Bo

作者机构：

关键词： dinoflagellate; transcriptional control; light regulation

期刊名称：MICROORGANISMS （ 影响因子：4.128； ）

ISSN：

年卷期： 2019 年 7 卷 8 期

页码：

收录情况： SCI

摘要： The control of transcription is poorly understood in dinoflagellates, a group of protists whose permanently condensed chromosomes are formed without histones. Furthermore, while transcriptomes contain a number of proteins annotated as transcription factors, the majority of these are cold shock domain proteins which are also known to bind RNA, meaning the number of true transcription factors is unknown. Here we have assessed the transcriptional response to light in the photosynthetic species Symbiodinium kawagutii. We find that three genes previously reported to respond to light using qPCR do not show differential expression using northern blots or RNA-Seq. Interestingly, global transcript profiling by RNA-Seq at LD 0 (dawn) and LD 12 (dusk) found only seven light-regulated genes (FDR = 0.1). qPCR using three randomly selected genes out of the seven was only able to validate differential expression of two. We conclude that there is likely to be less light regulation of gene expression in dinoflagellates than previously thought and suggest that transcriptional responses to other stimuli should also be more thoroughly evaluated in this class of organisms.

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