Journal of Practical Agriculture & Fisheries Research (현장농수산연구지)

Korea National University of Agriculture and Fisheries (국립한국농수산대학교 교육개발센터)
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Effects of Soil Drought and Waterlogging on Photosystem II Activities in Cercis Bunge

토양 건조 및 침수처리가 박태기나무의 광계 II 활성에 미치는 영향

  • Lee, K.C. (Department of Forestry, Korea National College of Agriculture & Fisheries) ;
  • Lee, U.Y. (Department of Forestry, Korea National College of Agriculture & Fisheries) ;
  • Youn, K.K. (Department of Forestry, Korea National College of Agriculture & Fisheries) ;
  • Kwon, Y.H. (Department of Landscape Architecture, Korea National College of Agriculture & Fisheries) ;
  • Han, S.K. (Department of Forestry, Korea National College of Agriculture & Fisheries)
  • 이경철 (국립한국농수산대학 산림학과) ;
  • 이의열 (국립한국농수산대학 산림학과) ;
  • 윤경규 (국립한국농수산대학 산림학과) ;
  • 권영휴 (국립한국농수산대학 조경학과) ;
  • 한상균 (국립한국농수산대학 산림학과)
  • Received : 2020.04.27
  • Accepted : 2020.06.12
  • Published : 2020.06.30
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Abstract

This study was conducted to investigate the photosystem II activities of Cercis chinensis by soil water condition. Drought stress was induced by withholding water and waterlogging treatments was immerging the pots for 15 days. Results showed that the relative activities per reaction center such as ABS/RC, TRo/RC and Dio/RC were significantly increased compared with the control group after 12 days in waterlogging treatments. Particularly, Dio/RC increased substantially under waterlogging stress, indicating that excessive energy was consumed by heat dissipation. Furthermore, the performance index on absorption basis(PIabs) and responses to structural and functional PS II(SFIabs) were dramatically decreased after 15 days in both the drought and waterlogging treatments, which reflects the relative reduction state of the photosystem II. These results of chlorophyll a fluorescence by OKJIP analysis show that the sensitive changes photosystem II activity. Thus, on the basis of our results that Cercis chinensis was exhibited a strong reduction of photosynthetic activity to waterlogging stress, and OKJIP parameters such as ABS/RC, DIo/RC, PIabs and SFIabs could be useful indicator to monitor the physiological states of Cercis chinensis under soil water condition.

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References

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