Identification and expression analysis of the E2F/DP genes under salt stress in Medicago truncatula

다국어 초록 (Multilingual Abstract)

Cell cycle control in plants converges on theRb/E2F/DP pathway, which is regulated by cyclin-dependentkinases. Plants can coordinate their cell cycles duringsalt stress to benefit their growth and development. However,the mechanism underlying cell cycle control undersalt stress is still unclear. Here, we identified five predictedE2F/DP genes in the Medicago truncatula genome,including three E2Fs, one DP, and one DEL. The conserveddomains of the E2F/DP proteins were relativelywell conserved with those of Arabidopsis thaliana andOryza sativa. Intron/exon organization analyses indicatedthat Medtr;E2Fc and Medtr;DPa gained/lost introns in theconserved domains during recent evolutionary process.
Furthermore, an expression analysis showed that thesegenes were expressed with varied transcription levels in allof the tissues tested. Contrasting gene expression changesin response to salt treatment in salt-tolerant versus saltsensitivegenotypes indicated that Medtr;DPa might be acandidate gene underlying the salt tolerance. This studywill contribute to the understanding of the E2F/DP transcriptionfactors in M. truncatula and of the mechanismorganizing cell cycle regulation and salt stress.

참고문헌 (Reference)

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