NDLI: The mitochondrial plasmid of the true slime mold Physarum polycephalum bypasses uniparental inheritance by promoting mitochondrial fusion

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The mitochondrial plasmid of the true slime mold Physarum polycephalum bypasses uniparental inheritance by promoting mitochondrial fusion

Content Provider	Springer Nature Link
Author	Sakurai, Rakusa mura, Hideo Moriyam, Yohsuke Kawa, Shigeyuki
Copyright Year	2004
Abstract	Mitochondrial DNA (mtDNA) is inherited maternally in most eukaryotes. Linear mitochondrial plasmids in higher plants and fungi are also transmitted from the maternal parent to the progeny. However, mF, which is a mitochondrial linear plasmid of Physarum polycephalum, evades uniparental mitochondrial inheritance. We examined 36 myxamoebal strains of Physarum and isolated three novel mF + strains (JE8, TU111, NG111) that harbored free mF plasmids. These strains were mated with the mF − strain KM88. Of the three mF − × mF + crosses, only KM88 × JE8 displayed complete uniparental inheritance. However, in KM88 × TU111 and KM88 × NG111, the mtDNA of KM88 and mF of TU111 and NG111 were inherited by the plasmodia and showed recombination. For example, although the mtDNA of TU111 was eliminated, the mF of TU111 persisted and became inserted into the mtDNA of KM88, such that recombinant mtDNA represented 80% of the total mtDNA. The parental mitochondria fused to yield giant mitochondria with two or more mitochondrial nucleoids. The mF appears to exchange mitochondria from the recipient (paternal) to the donor (maternal) by promoting mitochondrial fusion.
Starting Page	103
Ending Page	114
Page Count	12
File Format	PDF
ISSN	01728083
Journal	Current Genetics
Volume Number	46
Issue Number	2
e-ISSN	14320983
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-06-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mitochondria Fusion Plasmid Uniparental inheritance Physarum polycephalum
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine

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