Blar i forfatter "Hansen, Per Juel"

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    • Dimorphism in cryptophytes—The case of Teleaulax amphioxeia/Plagioselmis prolonga and its ecological implications 

      Altenburger, Andreas; Blossom, Hannah E.; Garcia-Cuetos, Lydia; Jakobsen, Hans H.; Carstensen, Jacob; Lundholm, Nina; Hansen, Per Juel; Haraguchi, Lumi (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-11)
      Growing evidence suggests that sexual reproduction might be common in unicellular organisms, but observations are sparse. Limited knowledge of sexual reproduction constrains understanding of protist ecology. Although <i>Teleaulax amphioxeia</i> and <i>Plagioselmis prolonga</i> are common marine cryptophytes worldwide, and are also important plastid donors for some kleptoplastic ciliates and ...

    • Ecophysiological traits of mixotrophic Strombidium spp 

      Maselli, Maira; Altenburger, Andreas; Stoecker, Diane K.; Hansen, Per Juel (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-07)
      Ciliates represent an important trophic link between nanoplankton and mesoplankton. Many species acquire functional chloroplasts from photosynthetic prey, being thus mixotrophs. Little is known about which algae they exploit, and of the relevance of inorganic carbon assimilation to their metabolism. To get insights into these aspects, laboratory cultures of three mixotrophic <i>Strombidium</i> spp. ...

    • Limits to the cellular control of sequestered cryptophyte prey in the marine ciliate Mesodinium rubrum 

      Altenburger, Andreas; Cai, Huimin; Li, Qiye; Drumm, Kirstine; Kim, Miran; Zhu, Yuanzhen; Garcia-Cuetos, Lydia; Zhan, Xiaoyu; Hansen, Per Juel; John, Uwe; Li, Shuaicheng; Lundholm, Nina (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-23)
      The marine ciliate <i>Mesodinium rubrum</i> is famous for its ability to acquire and exploit chloroplasts and other cell organelles from some cryptophyte algal species. We sequenced genomes and transcriptomes of free-swimming <i>Teleaulax amphioxeia</i>, as well as well-fed and starved <i>M. rubrum</i> in order to understand cellular processes upon sequestration under different prey and light ...

    • Physiological Responses of Mesodiniummajor to Irradiance, Prey Concentration and Prey Starvation 

      Drumm, Kristine; Norlin, Andreas; Kim, Miran; Altenburger, Andreas; Hansen, Per Juel (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-18)
      Ciliates within the <i>Mesodinium rubrum/Mesodinium major</i> species complex harbor chloroplasts and other cell organelles from specific cryptophyte species. <i>Mesodinium major</i> was recently described, and new studies indicate that blooms of <i>M. major</i> are just as common as blooms of <i>M. rubrum</i>. Despite this, the physiology of <i>M. major</i> has never been studied and compared to ...