광 및 CO2 변화 조건에서 브로콜리(Brassica oleracea var. italica)의 전기적 신호 모니터링 = Monitoring of plant induced electrical signal of broccoli (Brassica oleracea var. italica) under changing light and CO2 conditions

국문 초록 (Abstract)

환경 조건의 변화는 식물의 물과 양분 흡수 및 광합성 정도를변화시켜 결과적으로 식물 생육에 영향을 미친다. 변화하는 환경 조건에서 식물의 생리적 반응은 식물 줄기에 전극을 삽입해식물유도 전기신호(PIES)로 비파괴적으로 모니터링할 수 있다.
본 연구의 목적은 CO2 증가와 광합성 광량자속밀도 PPFD 감소에 따른 식물의 반응으로 PIES를 모니터링하는 것이다. PIES 는 증산과 광합성이 일어나는 낮에 증가하였고 식물 생육 기간동안 모니터링한 CO2 농도는 PIES와 음의 상관관계를 보였다.
CO2 농도 증가는 PIES를 약간 감소시켰으나 PIES에 큰 영향을미치지 않았으며 이는 CO2 증가의 효과가 낮은 PPFD에 의해제한되었기 때문으로 판단된다. PPFD 감소의 효과는 물과 양분흡수가 광에 의해 즉각적으로 영향을 받지 않았기 때문에 즉시나타나지는 않았다. 본 연구는 CO2 증가와 PPFD 감소에 의한식물의 단기적 반응을 평가하고자 한 것이며 프롤린 함량 및 엽록소 형광은 환경 변화에 따라 유의하게 변화하지는 않았다.

다국어 초록 (Multilingual Abstract)

Changing environmental conditions can affect plant growth by influencing water and nutrient transport and photosynthesis. Plant physiological responses under changing environmental conditions can be non-destructively monitored using electrodes as plant induced electrical signal (PIES).
Objective of the study was to monitor PIES in response to increased CO2 and decreased photosynthetic photon flux density (PPFD). The PIES increased during day time when transpiration and photosynthesis occurs and monitored CO2 concentration was negatively correlated to the PIES. Enhanced CO2 concentration slightly reduced PIES, but the effect of increased CO2 was limited by light intensity. The effect of reduced PPFD was not appeared immediately because water and nutrient transport was not promptly affected by the light. The study was conducted to evaluate short-term effect of increasing CO2 and decreasing PPFD, hence proline content and chlorophyll fluorescence was not significantly affected by the conditions.

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