Causes and consequences of soil bacterial rarity

Research output: Thesisinternal PhD, WU

Abstract

In the highly diverse community of soil bacteria most species occur at extremely low numbers and are consequently called the “rare biosphere”. In this thesis I studied why these species are rare whereas others are common. I found that many rare bacterial species can grow rapidly and are doing well in competition, but that rare species could be more vulnerable to predation. This might account for their rarity in soil. Still growth, competitiveness and predation resistance differed greatly between rare species. In addition, I tested if rare soil bacterial species can protect plants from insect attack by stimulating resistance mechanisms in the plant. However, there was no effect of rare bacteria on plant resistance. Rather plant response varied with different bacterial communities regardless of whether rare species were present or not. Overall, my thesis demonstrates that there are likely no general causes of bacterial rarity or general consequences for plant health.

Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
Supervisors/Advisors
  • van der Putten, Wim, Promotor
  • Hol, W.H.G., Co-promotor, External person
Award date22 May 2018
Place of PublicationWageningen
Publisher
Print ISBNs9789463432498
DOIs
Publication statusPublished - 2018

Fingerprint

predation
soil
plant health
soil bacteria
resistance mechanisms
bacterial communities
plant response
insects
bacteria
rare species
biosphere

Cite this

Kurm, Viola. / Causes and consequences of soil bacterial rarity. Wageningen : Wageningen University, 2018. 206 p.
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title = "Causes and consequences of soil bacterial rarity",
abstract = "In the highly diverse community of soil bacteria most species occur at extremely low numbers and are consequently called the “rare biosphere”. In this thesis I studied why these species are rare whereas others are common. I found that many rare bacterial species can grow rapidly and are doing well in competition, but that rare species could be more vulnerable to predation. This might account for their rarity in soil. Still growth, competitiveness and predation resistance differed greatly between rare species. In addition, I tested if rare soil bacterial species can protect plants from insect attack by stimulating resistance mechanisms in the plant. However, there was no effect of rare bacteria on plant resistance. Rather plant response varied with different bacterial communities regardless of whether rare species were present or not. Overall, my thesis demonstrates that there are likely no general causes of bacterial rarity or general consequences for plant health.",
author = "Viola Kurm",
note = "WU thesis 6935 Includes bibliographical references. - With summaries in English, Dutch and German",
year = "2018",
doi = "10.18174/440534",
language = "English",
isbn = "9789463432498",
publisher = "Wageningen University",
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}

Kurm, V 2018, 'Causes and consequences of soil bacterial rarity', Doctor of Philosophy, Wageningen University, Wageningen. https://doi.org/10.18174/440534

Causes and consequences of soil bacterial rarity. / Kurm, Viola.

Wageningen : Wageningen University, 2018. 206 p.

Research output: Thesisinternal PhD, WU

TY - THES

T1 - Causes and consequences of soil bacterial rarity

AU - Kurm, Viola

N1 - WU thesis 6935 Includes bibliographical references. - With summaries in English, Dutch and German

PY - 2018

Y1 - 2018

N2 - In the highly diverse community of soil bacteria most species occur at extremely low numbers and are consequently called the “rare biosphere”. In this thesis I studied why these species are rare whereas others are common. I found that many rare bacterial species can grow rapidly and are doing well in competition, but that rare species could be more vulnerable to predation. This might account for their rarity in soil. Still growth, competitiveness and predation resistance differed greatly between rare species. In addition, I tested if rare soil bacterial species can protect plants from insect attack by stimulating resistance mechanisms in the plant. However, there was no effect of rare bacteria on plant resistance. Rather plant response varied with different bacterial communities regardless of whether rare species were present or not. Overall, my thesis demonstrates that there are likely no general causes of bacterial rarity or general consequences for plant health.

AB - In the highly diverse community of soil bacteria most species occur at extremely low numbers and are consequently called the “rare biosphere”. In this thesis I studied why these species are rare whereas others are common. I found that many rare bacterial species can grow rapidly and are doing well in competition, but that rare species could be more vulnerable to predation. This might account for their rarity in soil. Still growth, competitiveness and predation resistance differed greatly between rare species. In addition, I tested if rare soil bacterial species can protect plants from insect attack by stimulating resistance mechanisms in the plant. However, there was no effect of rare bacteria on plant resistance. Rather plant response varied with different bacterial communities regardless of whether rare species were present or not. Overall, my thesis demonstrates that there are likely no general causes of bacterial rarity or general consequences for plant health.

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