期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 58, 期 1, 页码 1-9出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erl148
关键词
Amborella trichopoda; genome evolution; horizontal (lateral) gene transfer; plant mitochondria
资金
- NIGMS NIH HHS [R01-GM-70612] Funding Source: Medline
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM070612] Funding Source: NIH RePORTER
Horizontal gene transfer (HGT) has played a major role in bacterial evolution and is fairly common in certain unicellular eukaryotes. However, the prevalence and importance of HGT in the evolution of multicellular eukaryotes remain unclear. Recent studies indicate that plant mitochondrial genomes are unusually active in HGT relative to all other organellar and nuclear genomes of multicellular eukaryotes. Although little about the mechanisms of plant HGT is known, several studies have implicated parasitic plants as both donors and recipients of mitochondrial genes. Most cases uncovered thus far have involved a single transferred gene per species; however, recent work has uncovered a case of massive HGT in Amborella trichopoda involving acquisition of at least a few dozen and probably hundreds of foreign mitochondrial genes. These foreign genes came from multiple donors, primarily eudicots and mosses. This review will examine the implications of such massive transfer, the potential mechanisms and consequences of plant-to-plant mitochondrial HGT in general, as well as the limited evidence for HGT in plant chloroplast and nuclear genomes.
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