Variation of Expression Levels of Seven Housekeeping Genes at Different Life-History Stages in Porphyra yezoensis
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| Authors: | Xiaojie Wu Aiyou Huang Meiling Xu Chao Wang Zhaojun Jia Guangce Wang Jianfeng Niu |
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| Institution: | 1. College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin, China.; 2. Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.; 3. Graduate School, Chinese Academy of Sciences, Beijing, China.; Rutgers University, United States of America, |
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| Abstract: | In order to identify the optimal internal control for relative real-time PCR when studying target gene expression in the red alga Porphyra yezoensis, we quantified the expression of seven housekeeping genes (18S ribosomal RNA, 30S ribosomal protein S8, Polyubiquitin-2, Glyceraldehyde-3-phosphate dehydrogenase, Elongation factor 1-alpha, Beta-tubulin and Actin 3) at different life-history stages. Absolute quantification was done by normalization to total RNA quantity and by normalization to genomic DNA quantity. We used these two normalization approaches, comparing the differences of expression levels of all candidate housekeeping genes between any two generations and across three life-history stages (filamentous sporophytes, leafy gametophytes and conchospores). We found GAPDH had the best stability in all cases and we recommend that GAPDH be considered as a potential internal control for gene expression studies at different life-history stages in P. yezoensis. |
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