• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2012년도 심포지엄 및 춘계학술발표회
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• pp.17-18
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• 2012

• 한국작물학회지
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• 제27권2호
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• pp.175-181
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• 1982

사양토에서 인삼생육의 최적 토양 함수량 구명키 위해 토양함수량별 지상하부, 생식생장, 광합성 등을 조사한 바 그 결과는 다음과 같다. 1. 근건물중 및 동직경은 62%(절대수분 13.9%)가 가장 양호하였다. 2. 엽면적, 엽건물중은 62%(절대수분 13.9%)가 가장 양호하였으며 개체당 개화수, 결실율, 종자생산량도 같은 경향이었다. 3. 단위 면적당 광합성량은 토양 함수량이 많을수록 증가하였으나 개체당 광합성량은 62%가 가장 양호하였다. 4. 증산량은 토양함수량과 비례하였으나 기공의 밀도는 반비례하였다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1989년도 춘계 학술대회지
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• pp.56-57
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• 1989

• 한국작물학회:학술대회논문집
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• 한국작물학회 1988년도 정기총회 및 학술연구발표회
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• pp.34-35
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• 1988

• 한국작물학회:학술대회논문집
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• 한국작물학회 1990년도 춘계 학술대회지
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• pp.46-47
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• 1990

• 한국작물학회:학술대회논문집
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• 한국작물학회 1994년도 추계 학술대회지
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• pp.78-79
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• 1994

• 한국잡초학회지
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• 제8권2호
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• pp.176-181
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• 1988

본(本) 시험(試驗)은 수도(水稻)(품종(品種): 일본청(日本晴)) 엽편(葉片)을 이용(利用)한 산소전극법(酸素電極法)의 광합성속도(光合成速度)와 엽록소(葉綠素) 보유능(保有能)에 미치는 식물(植物)호르몬의 작용(作用)을 구명(究明)코자 수행(遂行)하였으며, 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 산소전극법(酸素電極法)에 의(依)한 수도(水稻) 광합성속도(光合成速度)에 미치는 식물(植物)호르몬의 효과(效果) 가. 광합성속도(光合成速度)에 미치는 IAA의 경과일수별효과(經過日數別效果)는 20 ppm 처리(處理)에서 약간 조해(阻害)되었으나 저농도(低濃度)에서는 무처리(無處理)와 유사(類似)하였다. 나. BA 0.2, 2, 20 ppm의 경과일수별(經過日數別) 효과(效果)는 BA 농도(濃度)가 높을수록 현저(顯著)하게 고양(高揚)되었다. 마. $GA_3$는 고농도(高濃度)인 20ppm 처리(處理)에서 조해작용(阻害作用)이 보였다. 라. ABA는 모든 처리농도(處理濃度)에서 조해작용(阻害作用)이 보였고, 농도(濃度)가 높을수록 더욱 조해(阻害)되었다. 2. 식물(植物)호르몬이 수도(水稻)의 엽록소(葉綠素) 보유능(保有能)에 미치는 효과(效果) 가. IAA, BA, $GA_3$는 농도(濃度)가 높을수록 엽록소(葉綠素) 보유능(保有能)이 높았다. 나. ABA는 0.2, 2, 20 ppm 전처리(全處理)에서 현저(顯著)한 엽록소(葉綠素) 감쇠(減衰)가 보였다.

• 원예과학기술지
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• 제34권5호
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• pp.708-718
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• 2016

Two different pest control programs were applied on 8-year-old 'Ryoka'/M.26 apple trees (Malus domestica Borkh.). Lime sulfur or Bordeaux mixture with emulsified oil were applied 12 times from late March to mid-September as organic treatment, and synthetic chemicals were 7 times applied as control treatment. Over the entire apple-growing season, photosynthesis rates of apple trees were significantly lower in the organic treatment than in the control, and this photosynthetic differences were larger in July and August. Photosynthesis-related parameters such as stomatal conductance and transpiration behaved similarly to photosynthesis. The leaf area in the organic treatment was significantly smaller ($24.7cm^2$) than that in the control treatment ($30.7cm^2$). Organic leaves contained significantly less Chl. a ($15.5mg{\cdot}g^{-1}$) than did control leaves ($17.6mg{\cdot}g^{-1}$). Fruit yield per tree was significantly lower in the organic treatment (18.8 kg) than in the control (24.5 kg), because organic fruits experienced a higher rate of disease infection such as white rot (Botryosphaeria dothidae) and bitter rot (Glomerella cingulata) than did control fruits. Organic fruits had high flesh firmness but less color development (lower Hunter's a values). In this experiment, the pest control program with frequent applications of organic fungicides showed negative effects on photosynthesis and disease infection on leaves and fruits, and thus reduce the fruit quality and yield in 'Ryoka'/M.26 apple trees.

• ALGAE
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• 제31권3호
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• pp.243-256
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• 2016

Concerns about how ocean acidification will impact marine organisms have steadily increased in recent years, but there is a lack of knowledge on the responses of macroalgae. Here, we adopt an outdoor continuous-flowing mesocosm system designed for ocean acidification experiment that allows high CO₂ conditions to vary with natural fluctuations in the environment. Following the establishment of the mesocosm, five species of macroalgae that are common along the coast of Korea (namely Ulva pertusa, Codium fragile, Sargassum thunbergii, S. horneri, and Prionitis cornea) were exposed to three different CO₂ concentrations: ambient (×1) and elevated CO₂ (2× and 4× ambient), over two-week period, and their ecophysiological traits were measured. Results indicated that both photosynthesis and growth exhibited species-specific responses to the different CO₂ concentrations. Most notably, photosynthesis and growth increased in S. thunbergii when exposed to elevated CO₂ conditions but decreased in P. cornea. The preference for different inorganic carbon species (CO₂ and HCO₃⁻), which were estimated by gross photosynthesis in the presence and absence of the external carbonic anhydrase (eCA) inhibitor acetazolamide, were also found to vary among species and CO₂ treatments. Specifically, the two Sargassum species exhibited decreased eCA inhibition of photosynthesis with increased growth when exposed to high CO₂ conditions. In contrast, growth of U. pertusa and C. fragile were not notably affected by increased CO₂. Together, these results suggest that the five species of macroalgae may respond differently to changes in ocean acidity, with species-specific responses based on their differentiated photosynthetic acclimation. Understanding these physiological changes might allow us to better predict future changes in macroalgal communities in a more acidic ocean.

• Journal of Ginseng Research
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• 제8권1호
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• pp.65-74
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• 1984

This experiment was carried out to study the effects of light intensity and soil water regimes on the growth of ginseng seedling. The results were as follows: 1. The maximum light intensity and optimum temperature in 1,le photosynthesis of ginseng seedling were 10,000 lux and 23 $^{\circ}C$. Respiration rate was increased at high temperature. 2. Air and soil temperature under the shading were increased as the increase of light intensity but soil water contents were decreased as the increase of light intensity, whereas air and soil temperature were decreased as the increase of precipitation under the shade b5: soil water contents were increased as the increase of precipitation under the shade. 3. The higher the transmittance of the shade, the greater the specific leaf weight (S.L.W.) and stomatal density. In contrast, however, the contents of total chlorophyll, chlorophyll a and b, and stomatal length was decreased. There was no any significant difference light intensity of the a/b ratio of chlorophyll. 4. The highest photosynthesis was occurred in ginseng leaves grown under the shade 5% L.T.R. and net photosynthesis rates increased with increasing soil water contents. 5. Optimum condition for usable seedling yield were 5% L.T.R. and 3.3% precipitation under the shade. Useless seedling increased with increasing precipitation under the shade.