Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Comparing Net CO2 Uptake of Schlumbergera truncata 'Pink Dew' Phylloclades in a Growth Chamber and a Greenhouse

생육상과 온실에서 게발선인장 '핑크듀'의 엽상경별 CO2 흡수율 비교

  • Seo Hee Jung (Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women's University) ;
  • Ah Ram Cho (Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women's University) ;
  • Yoon Jin Kim (Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women's University)
  • 정서희 (서울여자대학교 원예생명조경학과) ;
  • 조아람 (서울여자대학교 원예생명조경학과) ;
  • 김윤진 (서울여자대학교 원예생명조경학과)
  • Received : 2023.01.09
  • Accepted : 2023.01.31
  • Published : 2023.01.31
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Abstract

Crassulacean acid metabolism (CAM) plants use surplus CO2 generated by cooling and heating at night when ventilation is not needed in a greenhouse. Schlumbergera truncata 'Pink Dew' is a multi-flowering cactus that needs more phylloclades for high-quality production. This study examined photosynthetic characteristics by the phylloclade levels of S. truncata in a growth chamber and a greenhouse for use of night CO2 enrichment. The CO2 uptake rate of the S. truncata's top phylloclade in a growth chamber exhibited a C3 pattern, and the second phylloclade exhibited a C3-CAM pattern. The CO2 uptake rate of the top phylloclade in a greenhouse showed a negative value both day and night, but those of the second phylloclade exhibited a CAM pattern. The stomatal conductance and water-use efficiency (WUE) of S. truncata at both the top and second phylloclades were higher in a growth chamber than in a greenhouse. The WUE of S. truncata in a growth chamber and a greenhouse was higher at the second phylloclade, which is a CAM pattern compared with those of the top phylloclade. The daily total net CO2 uptake of S. truncata was higher in a growth chamber than in a greenhouse. The daily total net CO2 uptake of S. truncata at the second phylloclade had the highest value of 155 mmol·m-2·d-1 in a growth chamber. The night total CO2 uptake of S. truncate at the second phylloclade was 3-fold higher in a growth chamber than in a greenhouse. S. truncata's second phylloclade exhibited a CAM pattern that uptake CO2 at night, and the second phylloclade, was more mature than the top phylloclade. A multi-flowering cactus S. truncata 'Pink Dew' efficiently uptake night surplus CO2 in the proper environmental condition with matured phylloclade.

CAM 식물은 야간에 기공을 열어 CO2를 흡수하는 식물로 환기하지 않는 야간에 시설 내 발생한 잉여 CO2를 광합성에 이용할 수 있다. 게발선인장은 다화성으로, 엽상경 수가 많을수록 상품성이 높아진다. 본 연구는 게발선인장의 야간 CO2 시비 적용 가능성을 파악하기 위하여 생육 적정 환경인 생육상과 실제 농가의 환경에 따른 온실에서 엽상경별 광합성 특성을 조사하였다. 생육상 내 게발선인장 상위 엽상경은 주간에만 CO2 흡수를 하는 C3 특성을 보였으며, 2차 엽상경은 주/야간 모두 CO2 흡수를 하는 C3-CAM 특성을 보였다. 온실에서 상위 엽상경은 CO2 흡수를 하지 않았으나, 2차 엽상경은 야간에 CO2 흡수를 하는 CAM 특성을 보였다. 생육상 내 게발선인장의 기공전도도와 수분이용효율은 온실 내 식물에 비하여 모든 엽상경에서 높은 값을 나타냈다. 게발선인장의 수분이용효율은 생육상과 온실에서 모두 CAM 특성이 나타나는 2차 엽상경에서 상위 엽상경에 비하여 높았다. 일일 총 CO2 흡수율은 온실 내 식물에 비하여 생육상 내 식물에서 더 높게 나타났으며, 생육상 내 게발선인장의 2차 엽상경에서 값이 155mmol·m-2 ·d-1로 가장 높았다. 게발선인장 '핑크듀'는 성숙한 엽상경에서 야간에 CO2 흡수가 활발히 일어나는 CAM 특성을 나타낸다. 다화성으로 시장성이 높은 게발선인장 '핑크듀'는 적정 환경과 성숙한 엽상경에서 효율적인 야간 탄소흡수가 가능한 식물이다.

Keywords

Acknowledgement

본 연구는 한국연구재단(NRF-2018R1A2B6007834)과 2022년도 서울여자대학교 산학협력 특별연구비(2022-0075)의 지원으로 수행되었음.

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