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Virus-Microbe Interactions in Marine Environments Determined by DNA Proximity Linkages
Virus-Microbe Interactions in Marine Environments Determined by DNA Proximity Linkages
Virus-Microbe Interactions in Marine Environments Determined by DNA Proximity Linkages

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211151953
ISBN  
9798383220375
DDC  
574
저자명  
Rathwell, Christina Renee.
서명/저자  
Virus-Microbe Interactions in Marine Environments Determined by DNA Proximity Linkages
발행사항  
[Sl] : University of Washington, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
176 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
주기사항  
Advisor: Rocap, Gabrielle.
학위논문주기  
Thesis (Ph.D.)--University of Washington, 2024.
초록/해제  
요약Microbial processes in the ocean drive global biogeochemical cycles and within microbial communities the most abundant entities are viruses. Viruses in the marine environment can alter microbial community composition and genomic potential when they interact with host and non-host microbes. However, because many host microbes are not yet in culture, traditional methods of culturing viruses cannot yet be undertaken for most viruses. A key component of interpreting data collected about virus presence and abundance across the world's oceans is determining with which microbes they can interact and under what conditions. In this thesis, I apply the DNA linkage method known as Hi-C sequencing to map out virus-host interactions in three different environments. In Chapter 1, I used this method to determine the impact and interaction of viruses with hosts in both particle-associated and free-living microbial communities at a depth below the euphotic zone in a shallow coastal fjord. I inferred that infected cells on particles were likely delivered to greater depths by particle flux and that viruses moved into new environments where host cells are sparse may interact with non-host organisms. In Chapter 2, I used Hi-C sequencing to analyze viral activity within the deep chlorophyll maximum of the Eastern Tropical North Pacific. Viruses were linked across multiple phytoplankton populations. I obtained evidence of viral auxiliary metabolic genes (AMGs) within Synechococcus cells at the time of sampling. Hi-C links also provided evidence of a known Phycodnaviridae, as well as a Mimivirus infecting a Bathycoccus prasinos at the time of sampling. Furthermore, a CrAss-like phage was shown to be interacting with a Planctomycetes of the Pirellulales order, a novel host in the marine environment for the Crassvirales family.In Chapter 3, I analyzed virus-microbe interactions in an oxygen deficient zone (ODZ), in the Eastern Tropical North Pacific, from which few microbes have been cultivated. The majority of organisms at this depth are prokaryotic and live amongst a diverse and unique community of viruses that have remained difficult to characterize. Hi-C links enhanced microbial binning and resulted in 268 medium-to-high quality bins with genomic potential for a range of methane, sulfur and nitrogen cycling metabolisms in the sample examined. We associated 75 viral genomes with microbial metagenomes in one sample and identified 19 virus-host interactions with high virus per host cell values. Though some virus-host interactions were predicted with computational software, the majority of viruses linking with hosts by Hi-C were not predicted computationally and these were statistically more abundant within the metagenome. Summarily, Hi-C method applied in this thesis revealed virus-microbe activity that other tools at our disposal could not, increasing our understanding of the complex path viral DNA may travel in marine environments, suggesting unique influences on biogeochemical cycling and potential genetic diversity.
일반주제명  
Biological oceanography
일반주제명  
Microbiology
일반주제명  
Biogeochemistry
키워드  
Hi-C sequencing
키워드  
Metagenomics
키워드  
Oxygen deficient zone
키워드  
Phytoplankton
키워드  
Puget sound
키워드  
Marine viruses
기타저자  
University of Washington Oceanography
기본자료저록  
Dissertations Abstracts International. 86-01B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aRathwell,  Christina  Renee.
■24510▼aVirus-Microbe  Interactions  in  Marine  Environments  Determined  by  DNA  Proximity  Linkages
■260    ▼a[Sl]▼bUniversity  of  Washington▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a176  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-01,  Section:  B.
■500    ▼aAdvisor:  Rocap,  Gabrielle.
■5021  ▼aThesis  (Ph.D.)--University  of  Washington,  2024.
■520    ▼aMicrobial  processes  in  the  ocean  drive  global  biogeochemical  cycles  and  within  microbial  communities  the  most  abundant  entities  are  viruses.  Viruses  in  the  marine  environment  can  alter  microbial  community  composition  and  genomic  potential  when  they  interact  with  host  and  non-host  microbes.  However,  because  many  host  microbes  are  not  yet  in  culture,  traditional  methods  of  culturing  viruses  cannot  yet  be  undertaken  for  most  viruses.  A  key  component  of  interpreting  data  collected  about  virus  presence  and  abundance  across  the  world's  oceans  is  determining  with  which  microbes  they  can  interact  and  under  what  conditions.  In  this  thesis,  I  apply  the  DNA  linkage  method  known  as  Hi-C  sequencing  to  map  out  virus-host  interactions  in  three  different  environments.  In  Chapter  1,  I  used  this  method  to  determine  the  impact  and  interaction  of  viruses  with  hosts  in  both  particle-associated  and  free-living  microbial  communities  at  a  depth  below  the  euphotic  zone  in  a  shallow  coastal  fjord.  I  inferred  that  infected  cells  on  particles  were  likely  delivered  to  greater  depths  by  particle  flux  and  that  viruses  moved  into  new  environments  where  host  cells  are  sparse  may  interact  with  non-host  organisms.  In  Chapter  2,  I  used  Hi-C  sequencing  to  analyze  viral  activity  within  the  deep  chlorophyll  maximum  of  the  Eastern  Tropical  North  Pacific.  Viruses  were  linked  across  multiple  phytoplankton  populations.  I  obtained  evidence  of  viral  auxiliary  metabolic  genes  (AMGs)  within  Synechococcus  cells  at  the  time  of  sampling.  Hi-C  links  also  provided  evidence  of  a  known  Phycodnaviridae,  as  well  as  a  Mimivirus  infecting  a  Bathycoccus  prasinos  at  the  time  of  sampling.  Furthermore,  a  CrAss-like  phage  was  shown  to  be  interacting  with  a  Planctomycetes  of  the  Pirellulales  order,  a  novel  host  in  the  marine  environment  for  the  Crassvirales  family.In  Chapter  3,  I  analyzed  virus-microbe  interactions  in  an  oxygen  deficient  zone  (ODZ),  in  the  Eastern  Tropical  North  Pacific,  from  which  few  microbes  have  been  cultivated.  The  majority  of  organisms  at  this  depth  are  prokaryotic  and  live  amongst  a  diverse  and  unique  community  of  viruses  that  have  remained  difficult  to  characterize.  Hi-C  links  enhanced  microbial  binning  and  resulted  in  268  medium-to-high  quality  bins  with  genomic  potential  for  a  range  of  methane,  sulfur  and  nitrogen  cycling  metabolisms  in  the  sample  examined.  We  associated  75  viral  genomes  with  microbial  metagenomes  in  one  sample  and  identified  19  virus-host  interactions  with  high  virus  per  host  cell  values.  Though  some  virus-host  interactions  were  predicted  with  computational  software,  the  majority  of  viruses  linking  with  hosts  by  Hi-C  were  not  predicted  computationally  and  these  were  statistically  more  abundant  within  the  metagenome.  Summarily,  Hi-C  method  applied  in  this  thesis  revealed  virus-microbe  activity  that  other  tools  at  our  disposal  could  not,  increasing  our  understanding  of  the  complex  path  viral  DNA  may  travel  in  marine  environments,  suggesting  unique  influences  on  biogeochemical  cycling  and  potential  genetic  diversity.
■590    ▼aSchool  code:  0250.
■650  4▼aBiological  oceanography
■650  4▼aMicrobiology
■650  4▼aBiogeochemistry
■653    ▼aHi-C  sequencing
■653    ▼aMetagenomics
■653    ▼aOxygen  deficient  zone
■653    ▼aPhytoplankton
■653    ▼aPuget  sound
■653    ▼aMarine  viruses
■690    ▼a0416
■690    ▼a0410
■690    ▼a0425
■71020▼aUniversity  of  Washington▼bOceanography.
■7730  ▼tDissertations  Abstracts  International▼g86-01B.
■790    ▼a0250
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162272▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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