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수분스트레스가 땃두릅나무의 광합성 능력 및 광계 II의 활성에 미치는 영향 KCI 등재

Effects of Drought Stress on Photosynthetic Capacity and Photosystem II Activity in Oplopanax elatus

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한국약용작물학회지 (Korean Journal of Medical Crop Science)
한국약용작물학회 (The Korean Society of Medicinal Crop Science)
초록

This study was performed to investigate the physiological responses of Oplopanax elatus by water condition.Drought stress was induced by withholding water for 26 days. The results show that PN max, SPAD, gs, E and Ci weresignificantly decreased with decreasing of soil moisture contents. However, AQY and WUE were decreased slightly only at26 day. This implies that photosynthetic rate is reduced due to an inability to regulate water and CO₂exchange through thestomatal. According to JIP analysis, ΦPO, ΨO, ΦEO and PIABS were dramatically decreased at 21 day and 26 day, whichreflects the relative reduction state of the photosystem II. On the other hand, the relative activities per reaction center suchas ABS/RC, TRo/RC were significantly increased at 26 day. Particularly, Dio/RC and DIo/CS increased substantially underdrought stress, indicating that excessive energy was consumed by heat dissipation. These results of chlorophyll a fluores-cence show that the sensitivity changes photosystem II activity. Thus, according to the results, O. elatus was exhibited astrong reduction of photosynthetic activity to approximately 10% soil moisture contents, and JIP parameters could be usefulindicator to monitor the physiological states of O. elatus under drought stress.

저자
  • 이경철(국립생태원 식물관리처) | Kyeong Cheol Lee
  • 김선희(국립산림과학원 산림생태연구과) | Sun Hee Kim
  • 박완근(강원대학교 산림자원학과) | Wan Geun Park
  • 김영설(강원대학교 산림자원학과) | Young Seol Kim Corresponding author