This study was carried out to establish various physiological changes according to soil water stress and to compare the degree of water stress between two species of grapevines (‘Jinok’ as a new breeding cultivar and ‘Campbell Early’ as a control) using thermography. Soil water potentials were treated at -70, -30, and -5 kPa with waterlogging for 7 days. Regarding the photosynthetic rates (A) of the two cultivars, they showed an order of –30 kPA > -5 kPa > -70 kPa in order. With -70 kPa and waterlogging treatments, a decrease of photosynthetic rate was observed at 3 days after treatment, with a more significant decrease accumulating over time. At 7 days after treatment, photosynthetic rates of ‘Campbell Early’ (33.3, 45.6%) and ‘Jinok’ (56.6, 57.3%) grapes decreased compared to those with -30 kPa treatment. H2O2 and proline synthesis were the highest with the waterlogging treatment. In terms of proline synthesis, ‘Campbell Early’ had a relatively higher rate than ‘Jinok’. Leaf and stem water potential were the lowest with the -70 kPa treatment and the highest with the - 30 kPa treatment f or both cultivars. Crop water stress index (CWSI) showed the following order: waterlogging > -70 kPa > -5 kPa > -30 kPa, which was the opposite result of water vapor transfer (IG). As a result of correlation analysis between factors, photosynthetic rate showed negative correlations with the water potential of leaf and stem and crop water stress index but a positive correlation with the relative water content of leaves. Thus, tolerance to water stress of ‘Campbell Early’ was relatively stronger than that of ‘Jinok’ grape. It is possible to compare water stress using infrared imaging.

서 언
재료 및 방법
    식물재료, 기상 및 토양환경
    광합성 속도와 기공 전도도의 측정
    잎의 H2O2와 Proline 함량 분석
    잎, 줄기의 수분포텐셜과 엽상대수분 함량
    포도 잎의 열적이미지 분석
    통계분석
결과 및 고찰
    토양환경의 변화
    광합성 속도와 기공 전도도의 변화
    수체 내부 수분상태 및 광합성 특성
    수분스트레스 지표 항목들간의 관계
적 요
ACKNOWLEDGMENTS
REFERENCES

• 최영민(전북특별자치도농업기술원 약용자원연구소) | Young Min Choi (Medicinal Resource Research Institute, Jeonbuk State Agricultural Research & Extension Services, Namwon 55720, Republic of Korea)
• 정성민(국립원예특작과학원 과수과) | Sung Min Jung (Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science, Eumseong 27709, Republic of Korea)
• 최동근(전북대학교 원예학과) | Dong Geun Choi (Department of Horticulture, Chonbuk National University, Jeonju 54896, Republic of Korea)
• 송주희(한국농수산대학교 원예학부) | Ju Hee Song (Division of Horticulture, Korea National University of Agriculture and Fisheries, Jeonju 54874, Republic of Korea) Corresponding author