Paper · 2013 · Xibei zhiwu xuebao

Review of LTR Retrotransposons in Plants

Jiang Shuan

6
claims
10
verbatim quotes
0
citations
2
research areas
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Not open access

Abstract

Retrotransposons in eucaryon are mobile genetic elements with ubiquitousdistribution,these elements can amplify themselves via RNA intermediates and increase their copy numbers in genome.In high plants,retrotransposon is an important component of genome.Retrotransposons can be divided into five types,the LTR retrotransposons,an important subclass of transposable elements,are well suited for computational identification,as they contain two long terminal repeats(LTRs)and features such as PBS,PPT,GAG and POL open reading frames,TSD.Recent research indicated that methylation of LTR retrotransposon and environments seemed to be affecting the jump of retrotransposons.Retrotransposons could be inhibited by high degree of DNA methylation and activated by environments,which influence the function of surrounding genes.The characteristics of LTR retrotransposons,such as ubiquitous distribution,abundant copy number and insertional polymorphism in plant species,provide an excellent basis for the development of molecular markers,e.g.,RBIP,SSAP,IRAP,REMAP.In this review,we summarize the recent progress about the types and structures of retrotransposons,inhabitation and activation of LTR retrotransposons and their computational identification,molecular marker development.

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Claims 6

Observationobservedreview summarybasis n/a

Claim · model-written summary

The review states that plant retrotransposons are an important genome component.

Taxon
high plantse0
Outcome
important component of genomee0

Verbatim

e0

“In high plants,retrotransposon is an important component of genome”

✓ located verbatim in the source · abstract, characters 187–253 · show in text ↑
Observationobservedreview summarybasis n/a

Claim · model-written summary

The review describes five retrotransposon types.

Outcome
five typese0

Not reportedTaxon

Verbatim

e0

“Retrotransposons can be divided into five types”

✓ located verbatim in the source · abstract, characters 254–301 · show in text ↑
Method / resourceobservedreview summarypositivebasis n/a

Claim · model-written summary

LTR retrotransposons are suited to computational identification because of their structural features.

Taxon
PlantsViridiplantaet0
Outcome
computational identificatione0

Not reportedComparatorValue

Verbatim

t0

“Plants”

✓ located verbatim in the source · title, characters 34–40 · show in text ↑
e0

“the LTR retrotransposons,an important subclass of transposable elements,are well suited for computational identification,as they contain two long terminal repeats(LTRs)and features such as PBS,PPT,GAG and POL open reading frames,TSD”

✓ located verbatim in the source · abstract, characters 302–534 · show in text ↑
Associationobservedreview summarynegativebasis n/a

Claim · model-written summary

High DNA methylation inhibits LTR retrotransposons.

Taxon
PlantsViridiplantaet0
Compound
DNA methylatione0
Outcome
Retrotransposonse0
Direction
inhibitede0

Verbatim

t0

“Plants”

✓ located verbatim in the source · title, characters 34–40 · show in text ↑
e0

“Retrotransposons could be inhibited by high degree of DNA methylation”

✓ located verbatim in the source · abstract, characters 670–739 · show in text ↑
Associationobservedreview summarybasis n/a

Claim · model-written summary

Environmental conditions can activate retrotransposons, influencing surrounding genes.

Taxon
PlantsViridiplantaet0
Outcome
function of surrounding genese0
Setting
environmentse0

Not reportedDirection

Verbatim

t0

“Plants”

✓ located verbatim in the source · title, characters 34–40 · show in text ↑
e0

“activated by environments,which influence the function of surrounding genes”

✓ located verbatim in the source · abstract, characters 744–819 · show in text ↑
Method / resourceobservedreview summarypositivebasis n/a

Claim · model-written summary

LTR retrotransposon polymorphism and abundance support molecular marker development.

Taxon
plant speciese0
Outcome
development of molecular markerse0

Not reportedComparatorValue

Verbatim

t0

“Plants”

✓ located verbatim in the source · title, characters 34–40 · show in text ↑
e0

“ubiquitous distribution,abundant copy number and insertional polymorphism in plant species,provide an excellent basis for the development of molecular markers,e.g.,RBIP,SSAP,IRAP,REMAP”

✓ located verbatim in the source · abstract, characters 872–1056 · show in text ↑