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Chemotaxis to Microbial and Plant-Derived Chemicals by C. Elegans Nematodes and its Dependence on Feeding State
Chemotaxis to Microbial and Plant-Derived Chemicals by C. Elegans Nematodes and its Dependence on Feeding State
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153117
- ISBN
- 9798346565802
- DDC
- 616
- 서명/저자
- Chemotaxis to Microbial and Plant-Derived Chemicals by C. Elegans Nematodes and its Dependence on Feeding State
- 발행사항
- [Sl] : Stanford University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 121 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
- 주기사항
- Advisor: Goodman, Miriam.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2024.
- 초록/해제
- 요약Throughout history, humans have relied on plants for medication, flavoring, and food, and these plants have also coexisted in ecological communities with other plants, fungi, and animals for millions of years, evolving mechanisms of chemical communication. They release wide arrays of compounds into the environment, affecting animal and microbe behavior. Nematodes, like Caenorhabditis elegans, living in such communities must distinguish harmful from beneficial molecules. In this thesis, I present first a new platform we used to determine the chemotaxis valence of single molecules in C. elegans. In a screen of 90 plant molecules, 37 affected wild-type animals. Analysis of mutants defective in chemosensory ion channels reveals that most compounds relied on multiple ion channels, and chemotaxis valence is more likely to reflect an integration of neural signals than a labeled line. Using this platform, I further examined whether the biosynthetic precursors of natural products could also elicit responses, possibly as a co-evolutionary remnant. Many organisms, including plants and fungi, synthesize the strong attractants isoamyl alcohol and 2-methyl-1-butanol, and, when well-fed, wild-type and mutant nematodes exhibited weak or absent responses to precursor molecules, suggesting that they could be detected but were not particularly motivating. Following prolonged starvation, chemotactic responses were altered in two primary ways: responsiveness decreased to both strong attractants, and a new sensitivity to a precursor compound reliant on OSM-9 TRP channel signaling was revealed. These data also provided additional support for neural signal integration of chemosensory cues. Future studies will be needed to understand how starvation induces these changes in chemosensory behavior and signal integration. Understanding these dynamics sheds light on complex community interactions.
- 일반주제명
- Neurosciences
- 일반주제명
- Worms
- 일반주제명
- Success
- 일반주제명
- Butterflies & moths
- 일반주제명
- Communication
- 일반주제명
- Dissection
- 일반주제명
- Funding
- 일반주제명
- Solvents
- 일반주제명
- Entomology
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 86-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211153117
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■007cr#unu||||||||
■020 ▼a9798346565802
■035 ▼a(MiAaPQ)AAI31710849
■035 ▼a(MiAaPQ)Stanfordhw628zn1245
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616
■1001 ▼aLogan-Garbisch, Theresa.
■24510▼aChemotaxis to Microbial and Plant-Derived Chemicals by C. Elegans Nematodes and its Dependence on Feeding State
■260 ▼a[Sl]▼bStanford University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a121 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-05, Section: B.
■500 ▼aAdvisor: Goodman, Miriam.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2024.
■520 ▼aThroughout history, humans have relied on plants for medication, flavoring, and food, and these plants have also coexisted in ecological communities with other plants, fungi, and animals for millions of years, evolving mechanisms of chemical communication. They release wide arrays of compounds into the environment, affecting animal and microbe behavior. Nematodes, like Caenorhabditis elegans, living in such communities must distinguish harmful from beneficial molecules. In this thesis, I present first a new platform we used to determine the chemotaxis valence of single molecules in C. elegans. In a screen of 90 plant molecules, 37 affected wild-type animals. Analysis of mutants defective in chemosensory ion channels reveals that most compounds relied on multiple ion channels, and chemotaxis valence is more likely to reflect an integration of neural signals than a labeled line. Using this platform, I further examined whether the biosynthetic precursors of natural products could also elicit responses, possibly as a co-evolutionary remnant. Many organisms, including plants and fungi, synthesize the strong attractants isoamyl alcohol and 2-methyl-1-butanol, and, when well-fed, wild-type and mutant nematodes exhibited weak or absent responses to precursor molecules, suggesting that they could be detected but were not particularly motivating. Following prolonged starvation, chemotactic responses were altered in two primary ways: responsiveness decreased to both strong attractants, and a new sensitivity to a precursor compound reliant on OSM-9 TRP channel signaling was revealed. These data also provided additional support for neural signal integration of chemosensory cues. Future studies will be needed to understand how starvation induces these changes in chemosensory behavior and signal integration. Understanding these dynamics sheds light on complex community interactions.
■590 ▼aSchool code: 0212.
■650 4▼aNeurosciences
■650 4▼aWorms
■650 4▼aSuccess
■650 4▼aButterflies & moths
■650 4▼aCommunication
■650 4▼aDissection
■650 4▼aFunding
■650 4▼aSolvents
■650 4▼aEntomology
■690 ▼a0459
■690 ▼a0317
■690 ▼a0353
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g86-05B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17165047▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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