Effect of the Elevated Carbon Dioxide on the Growth and Physiological Responses of Peach ‘Mihong’

Seul Ki Lee; Jung Gun Cho; Jae Hoon Jeong; Suhyun Ryu; Jeom Hwa Han; Gyung-Ran Do

doi:10.12791/KSBEC.2021.30.4.312

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2021 Vol.30, Issue 4 Preview Page Next Page

Original Articles

Effect of the Elevated Carbon Dioxide on the Growth and Physiological Responses of Peach ‘Mihong’ CO₂ 상승처리가 복숭아 ‘미홍’의 수체생육 및 생리반응에 미치는 영향

31 October 2021. pp. 312-319

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Abstract

This study was conducted to investigate the effect of elevated carbon dioxide on the growth and physiological responses of peach ‘Mihong’ (Prunus persica). We simulated three different carbon dioxide conditions based on climate change scenarios RCP 8.5 in the sunlight phytotron rooms from April 22 to July 6, 2020; 400 µmol·mol^-1(present condition), 700 µmol·mol^-1 treatment(expecting carbon dioxide concentrations in mid-21st century), 940 µmol·mol^-1 treatment (expecting carbon dioxide concentrations in late 21st century). The average of maximum photosynthesis rate at 700 µmol·mol^-1(16.06 µmol·CO₂·m^-2·s^-1) was higher than those at 400 µmol·mol^-1(14.45 µmol·CO₂·m^-2·s^-1) and 940 µmol·mol^-1(15.96 µmol·CO₂·m^-2·s^-1) from May 22 to July 2. However, stomatal conductances at 700 µmol·mol^-1 and 940 µmol·mol^-1 were lower than those at the control. Also, the carbon dioxide saturation point in all treatments was reduced from 1,200 µmol·mol^-1 in the early stage of growth to 600－800 µmol·mol^-1 in the late stage of growth. The stomatal densities were decreased as carbon dioxide increased. The shoot lengths were decreased while the carbon dioxide was increased, but the increase of trunk diameter and leaf areas, shoot numbers were not statistically different. The fruit weight at 700 µmol·mol^-1(152.5 g) was higher than those at the control(141.8 g) and 940 µmol·mol^-1(147.4 g). The soluble solids were higher at 700 µmol·mol^-1, 940 µmol·mol^-1 compared to the control. These results suggest that a carbon dioxide elevated to 700 µmol·mol^-1 in the future may give a positive effect on the yield and fruit quality of peach ‘Mihong’ while a carbon dioxide elevated above 940 µmol·mol^-1 may affect negatively such as early senescence and loss of fruit set.

Keywords

Prunus persica

climate change

photosynthesis

shoot length

soluble solid

본 연구는 CO₂ 상승 처리에 따른 복숭아 ‘미홍’ 품종의 수체생육 및 생리반응에 미치는 영향을 알아보고자 수행하였다. CO₂농도는 기후변화 시나리오 RCP8.5를 기반하여 400 µmol·mol^-1(현재), CO₂ 상승구 700µmol·mol^-1(21C 중반기), 940µmol·mol^-1(21C 후반기)으로 4월 22일부터 7월 6일까지 처리하였다. 5월 22일부터 7월 2일까지의 최대광합성률 평균값은 700µmol·mol^-1 처리구에서 16.06µmol∙CO₂∙m^-2∙s^-1으로 대조구 14.45µmol∙CO₂∙m^-2∙s^-1와 940µmol·mol^-1 처리구의 15.96µmol∙CO₂∙m^-2∙s^-1보다 높았다. 그러나 기공전도도는 대조구보다 700µmol·mol^-1 및 940µmol·mol^-1 처리구에서 낮았다. 또한 모든 처리구에서 CO₂포화점은 생육 초기 1,200µmol·mol^-1에서 생육 후기 600－800µmol·mol^-1으로 낮아졌다. 기공 밀도는 CO₂가 상승할수록 감소하였다. 수체 생육 중 직경증가량, 엽면적, 신초 수는 통계적 유의차가 없었지만, 신초 길이는 CO₂가 상승할수록 짧아졌다. 과중은 700µmol·mol^-1(152.5g), 940µmol·mol^-1(147.4g), 400µmol· mol^-1(141.8g) 처리구 순으로 높았다. 가용성 고형물 함량은 대조구인 400µmol·mol^-1 처리구보다 CO₂ 상승 처리구에서 유의적으로 증가하였다. 이상의 결과들을 종합하면 700µmol· mol^-1 까지의 CO₂ 상승은 복숭아 ‘미홍’의 수량과 가용성 고형물 함량 등 과실 품질에 긍정적인 영향을 주는 반면, 940µmol·mol^-1 이상의 CO₂ 상승은 조기 노화 및 착과 부위 감소 등 복숭아 생산성에 부정적인 영향을 미치는 것으로 판단된다.

키워드

복숭아

기후변화

광합성

신초 길이

당도

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Journal of Bio-Environment Control
Journal Title(Ko) :생물환경조절학회지
Volume : 30
No :4
Pages :312-319
Received Date : 2021-08-09
Revised Date : 2021-09-28
Accepted Date : 2021-10-01
DOI :https://doi.org/10.12791/KSBEC.2021.30.4.312

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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