Segregation in a mycorrhizal fungus alters rice growth and symbiosis-specific gene transcription.
Identifieur interne : 002638 ( Main/Curation ); précédent : 002637; suivant : 002639Segregation in a mycorrhizal fungus alters rice growth and symbiosis-specific gene transcription.
Auteurs : Caroline Angelard [Suisse] ; Alexandre Colard ; Hélène Niculita-Hirzel ; Daniel Croll ; Ian R. SandersSource :
- Current biology : CB [ 1879-0445 ] ; 2010.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Oryza.
- génétique : Oryza.
- microbiologie : Oryza.
- physiologie : Mycorhizes, Transcription génétique.
- Fréquence d'allèle, Gènes de plante, Symbiose.
English descriptors
- KwdEn :
- MESH :
- genetics : Oryza.
- growth & development : Oryza.
- microbiology : Oryza.
- physiology : Mycorrhizae, Transcription, Genetic.
- Gene Frequency, Genes, Plant, Symbiosis.
Abstract
Arbuscular mycorrhizal fungi (AMF) form symbioses with the majority of plants, improving plant nutrition and diversity. Evidence exists suggesting that AMF contain populations of genetically different nucleotypes coexisting in a common cytoplasm. This potentially has two important consequences for their genetics. First, by random distribution of nuclei at spore formation, new offspring of an AMF could receive different complements of nucleotypes compared to the parent or siblings-we consider this as segregation. Second, genetic exchange between AMF would allow the mixing of nuclei, altering nucleotype diversity in new spores. Because segregation was assumed not to occur and genetic exchange has only recently been demonstrated, no attempts have been made to test whether this affects the symbiosis with plants. Here, we show that segregation occurs in the AMF Glomus intraradices and can enhance the growth of rice up to five times, even though neither parental nor crossed AMF lines induced a positive growth response. This process also resulted in an alteration of symbiosis-specific gene transcription in rice. Our results demonstrate that manipulation of AMF genetics has important consequences for the symbiotic effects on plants and could be used to enhance the growth of globally important crops.
DOI: 10.1016/j.cub.2010.05.031
PubMed: 20541408
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<author><name sortKey="Niculita Hirzel, Helene" sort="Niculita Hirzel, Helene" uniqKey="Niculita Hirzel H" first="Hélène" last="Niculita-Hirzel">Hélène Niculita-Hirzel</name>
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<term>Oryza (genetics)</term>
<term>Oryza (growth & development)</term>
<term>Oryza (microbiology)</term>
<term>Symbiosis (MeSH)</term>
<term>Transcription, Genetic (physiology)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Fréquence d'allèle (MeSH)</term>
<term>Gènes de plante (MeSH)</term>
<term>Mycorhizes (physiologie)</term>
<term>Oryza (croissance et développement)</term>
<term>Oryza (génétique)</term>
<term>Oryza (microbiologie)</term>
<term>Symbiose (MeSH)</term>
<term>Transcription génétique (physiologie)</term>
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<front><div type="abstract" xml:lang="en">Arbuscular mycorrhizal fungi (AMF) form symbioses with the majority of plants, improving plant nutrition and diversity. Evidence exists suggesting that AMF contain populations of genetically different nucleotypes coexisting in a common cytoplasm. This potentially has two important consequences for their genetics. First, by random distribution of nuclei at spore formation, new offspring of an AMF could receive different complements of nucleotypes compared to the parent or siblings-we consider this as segregation. Second, genetic exchange between AMF would allow the mixing of nuclei, altering nucleotype diversity in new spores. Because segregation was assumed not to occur and genetic exchange has only recently been demonstrated, no attempts have been made to test whether this affects the symbiosis with plants. Here, we show that segregation occurs in the AMF Glomus intraradices and can enhance the growth of rice up to five times, even though neither parental nor crossed AMF lines induced a positive growth response. This process also resulted in an alteration of symbiosis-specific gene transcription in rice. Our results demonstrate that manipulation of AMF genetics has important consequences for the symbiotic effects on plants and could be used to enhance the growth of globally important crops.</div>
</front>
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<Abstract><AbstractText>Arbuscular mycorrhizal fungi (AMF) form symbioses with the majority of plants, improving plant nutrition and diversity. Evidence exists suggesting that AMF contain populations of genetically different nucleotypes coexisting in a common cytoplasm. This potentially has two important consequences for their genetics. First, by random distribution of nuclei at spore formation, new offspring of an AMF could receive different complements of nucleotypes compared to the parent or siblings-we consider this as segregation. Second, genetic exchange between AMF would allow the mixing of nuclei, altering nucleotype diversity in new spores. Because segregation was assumed not to occur and genetic exchange has only recently been demonstrated, no attempts have been made to test whether this affects the symbiosis with plants. Here, we show that segregation occurs in the AMF Glomus intraradices and can enhance the growth of rice up to five times, even though neither parental nor crossed AMF lines induced a positive growth response. This process also resulted in an alteration of symbiosis-specific gene transcription in rice. Our results demonstrate that manipulation of AMF genetics has important consequences for the symbiotic effects on plants and could be used to enhance the growth of globally important crops.</AbstractText>
<CopyrightInformation>Copyright 2010 Elsevier Ltd. All rights reserved.</CopyrightInformation>
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