Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Regulation of hormone-related genes involved in adventitious root formation in sweetpotato

  • Nie, Hualin (Department of Environmental Horticulture, University of Seoul) ;
  • Kim, Sujung (Department of Environmental Horticulture, University of Seoul) ;
  • Lee, Yongjae (Department of Environmental Horticulture, University of Seoul) ;
  • Park, Hyungjun (Department of Environmental Horticulture, University of Seoul) ;
  • Lee, Jeongeun (Department of Environmental Horticulture, University of Seoul) ;
  • Kim, Jiseong (Department of Environmental Horticulture, University of Seoul) ;
  • Kim, Doyeon (Department of Environmental Horticulture, University of Seoul) ;
  • Kim, Sunhyung (Department of Environmental Horticulture, University of Seoul)
  • Received : 2020.08.07
  • Accepted : 2020.08.20
  • Published : 2020.09.30
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Abstract

The sweetpotatoes (Ipomoea batatas) generate adventitious roots (ARs) from cut stems that develop into storage roots and make for an important means of propagation. However, few studies have investigated the hormones involved in AR development in sweetpotato. In this study, the expression patterns of hormone-related genes involved in AR formation were identified using the transcriptome data. RNA-seq data from stems grown for 0 and 3 days after cutting were analyzed. In addition, hormone-related genes were identified among differentially expressed genes (DEGs) and filtered genes, and cluster analysis was used to characterize expression patterns by function. Most hormone-related regulated genes expressed 3 days after growing the cut stems were abscisic acid (ABA)-related genes, followed by ethylene- and auxin-related genes. For ABA, the biosynthesis genes (including genes annotated to NINE-CIS-EPOXYCAROTENOID DIOXYGENASE 3 (NCED3)) and signal transduction and perception genes (including genes annotated to PROTEIN PHOSPHATASE 2Cs (PP2Cs)) tended to decrease. Expression patterns of auxin- and ethylene-related genes differed by function. These results suggest that ABA, auxin, and ethylene genes are involved in AR formation and that they may be regulated in a hormone function-dependent manner. These results contribute to the identification of hormone functions during AR formation and may contribute to understanding the mechanism of AR formation in the sweetpotato.

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References

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