Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Influence of Drought Stress Treatment on Saponarin Content during the Growing Period of Barley Sprouts

새싹보리 재배기간 중 수분스트레스 처리가 사포나린 함량에 미치는 영향

  • Yoon, Young-Eun (Division of Applied Life Science (BK21 four), Gyeongsang National University) ;
  • Kim, Song Yoeb (Division of Applied Life Science (BK21 four), Gyeongsang National University) ;
  • Choe, Hyeonji (Division of Applied Life Science (BK21 four), Gyeongsang National University) ;
  • Cho, Ju Young (Division of Applied Life Science (BK21 four), Gyeongsang National University) ;
  • Seo, Woo Duck (Division of Crop Breeding, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Young-Nam (Institute of Agriculture and Life Science (IALS), Gyeongsang National University) ;
  • Lee, Yong Bok (Division of Applied Life Science (BK21 four), Gyeongsang National University)
  • 윤영은 (경상대학교 응용생명과학부(BK21 Four)) ;
  • 김송엽 (경상대학교 응용생명과학부(BK21 Four)) ;
  • 최현지 (경상대학교 응용생명과학부(BK21 Four)) ;
  • 조주영 (경상대학교 응용생명과학부(BK21 Four)) ;
  • 서우덕 (농촌진흥청 국립식량과학원 작물기초기반과) ;
  • 김영남 (경상대학교 농업생명과학연구원) ;
  • 이용복 (경상대학교 응용생명과학부(BK21 Four))
  • Received : 2021.11.05
  • Accepted : 2021.12.14
  • Published : 2021.12.31
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Abstract

BACKGROUND: Barley sprouts contain a large number of secondary metabolites such as polyphenols, saponarin, and policosanols. The synthesis of such secondary metabolites occurs as a defense mechanism against external environmental stresses. In particular, it has been widely known that drought stress (DS) increases the content of flavonoids in plants. The objective of this study was to investigate the effects of drought stress treatment on the saponarin content in barley sprouts during the growing period. METHODS AND RESULTS: In this study, changes in saponarin content with different DS exposure periods and times were evaluated under the hydroponic system. For establishing different DS treatment periods, water supply was stopped for 1, 2, and 3 days, once leaf length was at 10 cm. To control different DS treatment times, water supply was stopped for 2 days, once leaf lengths were 5, 10, and 15 cm. As a result, the water potential of barley sprouts decreased from -0.8 MPa (before DS treatment) to -1.2, -2.4, and -3.2 MPa (after DS treatment), and reversely recovered to -0.8 MPa after re-irrigation. When 10 cm leaves were subjected to DS for 1 and 2 days, the saponarin content increased by 12 and 10%, respectively, while it increased by 19% when DS was applied to the 5 cm leaves. CONCLUSION(S): The results of this study suggest that drought stress at the early stage of growth (5 cm) is most helpful to increase the saponarin content of barley sprouts.

Keywords

Acknowledgement

This work was supported by the Rural Development Administration (RDA), Republic of Korea (Project No. PJ014212032021) research fund.

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