Segregation in a mycorrhizal fungus alters rice growth and symbiosis-specific gene transcription

Details

Serval ID
serval:BIB_216E232AD621
Type
Article: article from journal or magazin.
Collection
Publications
Title
Segregation in a mycorrhizal fungus alters rice growth and symbiosis-specific gene transcription
Journal
Current Biology
Author(s)
Angelard C., Colard A., Niculita-Hirzel Hélène, Croll D., Sanders I.R.
ISSN
1879-0445[electronic], 0960-9822[linking]
Publication state
Published
Issued date
2010
Peer-reviewed
Oui
Volume
20
Number
13
Pages
1216-1221
Language
english
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.
Keywords
Gene Frequency, Genes, Plant, Mycorrhizae/physiology, Oryza sativa/genetics, Oryza sativa/growth & development, Symbiosis, Transcription, Genetic/physiology
Pubmed
Web of science
Open Access
Yes
Create date
17/06/2010 14:25
Last modification date
20/08/2019 12:58
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