한국농림기상학회지, 제 11권 제4호(2009) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 11, No. 4, (2009), pp. 143~150
DOI: 10.5532/KJAFM.2009.11.4.143
ⓒ Author(s) 2014. CC Attribution 3.0 License.


염화칼슘 처리가 산딸나무 잎의 광합성 기구, 기공전도도
및 형광이미지 특성에 미치는 영향

성주한, 제선미, 김선희, 김영걸
국립산림학원 산림보전부

(2009년 11월 17일 접수; 2009년 12월 04일 수정; 2009년 12월 04일 수락)

Effect of Calcium Chloride (CaCl2) on the Characteristics of
Photosynthetic Apparatus, Stomatal Conductance,
and Fluorescence Image of the Leaves of Cornus kousa

Joo Han Sung, Sun Mi Je, Sun-Hee Kim, Young-Kul Kim
Department of Forest Conservation, Korea Forest Research Institute, Seoul, 130-712, Korea

(Received November 17, 2009; Revised December 04, 2009; Accepted December 04, 2009)

ABSTRACT
Deicing salt is used to melt snow and ice on the road for traffic safety during the winter season, which accumulates in the roadside vegetation and induces visible injuries. The damage may accelerate particularly when it coincides with early spring leaf out. In order to better understand the response mechanisms, C. kousa (3-year-old) was irrigated twice prior to leaf bud in a rhizosphere with solutions of 0.5, 1.0, and 3.0% calcium chloride (CaCl2) concentration, that were made by using an industrial CaCl2 reagent practical deicing material in Seoul. Physiological traits of the mature leaves were progressively reduced by CaCl2 treatment, resulting in reductions of total chlorophyll contents, chlorophyll a:b, photosynthetic rate, quantum yield, stomatal conductance, FV/fM, and NPQ. On the contrary, light compensation point and dark respiration were increased at high CaCl2 concentration. A decrease in intercellular CO2 concentration by stomatal closure first resulted in a reduced photosynthetic rate and then was accompanied by low substance metabolic rates and photochemical damage. Based on the reduction of physiological activities at all treatments (CaCl2 0.5%, 1.0%, and 3.0%), C. kousa was determined as one of the sensitive species to CaCl2.

Keyword: Cornus kousa, Calcium chloride, Photosynthetic rate, Chlorophyll content, Fluorescence image

MAIN

적요

겨울철 도로의 안전을 위해서 사용되고 있는 제설제가 가로변의 식생에 축적이 되면 식물에 피해를 가져올 수 있는데, 특히 이른 봄의 제설제 사용은 식물이 다량의 수분을 요구하게 되는 개엽 시기와 맞물리게 되면서 그 피해가 가속화 될 수 있다. 우리나라에서 주로 사용하고 있는 제설제인 CaCl2 으로 산딸나무(C.kousa) 3년생 유묘를 대상으로 개엽 전 대조구를 포함해 각 처리구당 3본씩 선정하여 배치하고 각각 CaCl2 0.5%, 1.0%, 3.0% 를 2회 근권부에 처리하였다. 먼저, 가시적 피해 현상으로 잎눈에서 개엽이 어려워지며, 잎의 전개 후에도 시들음 현상과 잎끝마름현상 등이 나타났다. CaCl2 의 농도가 높아짐에 따라 산딸나무의 피해가 가중되었는데, CaCl2 처리에 따른 생리적 반응은 총엽록소함량, 엽록소 a:b, 광합성속도, 양자수율, 기공전도도, FV/FM, NPQ의 감소를 가져왔다. 반면 광보상점과 암호흡속도의 증가를 나타냈다. 기공의 닫힘으로 인한 엽육내 CO2 농도 저하와 이로인한 광합성속도의 감소가 1차적으로 일어나고 이후 물질대사량의 감소, 광화학계의 피해가 동반되는 것을 알 수 있었다. 모든 CaCl2 처리농도에서 산딸나무의 생리적 활동이 급격히 저하되는 경향으로 볼 때 CaCl2 에 민감한 수종으로 판단된다.

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