, Volume 248, Issue 5, pp 1331–1337 | Cite as

Transcription of soybean retrotransposon SORE-1 is temporally upregulated in developing ovules

  • Kenta Nakashima
  • Mayumi Tsuchiya
  • Sae Fukushima
  • Jun Abe
  • Akira KanazawaEmail author
Short Communication


Main conclusion

Transcription of soybean retrotransposon SORE-1 was temporally upregulated during ovule development. This transcriptional pattern was under intrinsic control conferred by the long terminal repeat of SORE-1.

Transcriptionally active retrotransposons are capable of inducing random disruption of genes, providing a powerful tool for mutagenesis. Activation of retrotransposons in reproductive cells, in particular, can lead to heritable changes. Here, we examined developmental control of transcription of soybean retrotransposon SORE-1. Transgenic Arabidopsis plants that contain β-glucuronidase (GUS) reporter gene fused with the SORE-1 long terminal repeat (LTR) had GUS staining in the ovule. Quantitative analysis of transcripts in plants with this DNA construct and those with the full-length SORE-1 element indicated a temporal upregulation of SORE-1 transcription during ovule development. A comparable phenomenon was also observed in soybean plants that had a recent insertion of this element in the GmphyA2 gene. These results provide evidence that the temporal upregulation of SORE-1 in the reproductive organ is sufficiently controlled by its LTR and indicate that the intrinsic expression pattern of SORE-1 is consistent with its mutagenic property.


Gametophyte Long terminal repeat Ovule Retrotransposon Soybean Transcriptional control 





Long terminal repeat


Transposable elements



We thank Yui Shiroshita, Natasia and Mei Kimura for technical help and Tetsuya Yamada for technical advice. This work was supported in part by JSPS KAKENHI Grant number JP17H03743.

Supplementary material

425_2018_3005_MOESM1_ESM.pdf (343 kb)
Supplementary material 1 (PDF 342 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Kenta Nakashima
    • 1
  • Mayumi Tsuchiya
    • 1
  • Sae Fukushima
    • 1
  • Jun Abe
    • 1
  • Akira Kanazawa
    • 1
    Email author
  1. 1.Research Faculty of AgricultureHokkaido UniversitySapporoJapan

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