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Pyropia yezoensis genome reveals diverse mechanisms of carbon acquisition in the intertidal environment.

Dongmei WangXinzi YuKuipeng XuGuiqi BiMin CaoEhud ZelzionChunxiang FuPeipei SunYang LiuFanna KongGuoying DuXianghai TangRuijuan YangJunhao WangLei TangLu WangYingjun ZhaoYuan GeYunyun ZhuangZhaolan MoYu ChenTian GaoXiaowei GuanRui ChenWeihua QuBin SunDebashish BhattacharyaYunxiang Mao
Published in: Nature communications (2020)
Changes in atmospheric CO2 concentration have played a central role in algal and plant adaptation and evolution. The commercially important red algal genus, Pyropia (Bangiales) appears to have responded to inorganic carbon (Ci) availability by evolving alternating heteromorphic generations that occupy distinct habitats. The leafy gametophyte inhabits the intertidal zone that undergoes frequent emersion, whereas the sporophyte conchocelis bores into mollusk shells. Here, we analyze a high-quality genome assembly of Pyropia yezoensis to elucidate the interplay between Ci availability and life cycle evolution. We find horizontal gene transfers from bacteria and expansion of gene families (e.g. carbonic anhydrase, anti-oxidative related genes), many of which show gametophyte-specific expression or significant up-regulation in gametophyte in response to dehydration. In conchocelis, the release of HCO3- from shell promoted by carbonic anhydrase provides a source of Ci. This hypothesis is supported by the incorporation of 13C isotope by conchocelis when co-cultured with 13C-labeled CaCO3.
Keyphrases
  • genome wide
  • life cycle
  • copy number
  • poor prognosis
  • genome wide identification
  • dna methylation
  • endothelial cells
  • particulate matter
  • gene expression
  • mass spectrometry
  • carbon dioxide
  • simultaneous determination