• 한국작물학회지
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• 제48권1호
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• pp.25-30
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• 2003

This research was conducted to compare the dry matter production and the yield productivity among nine soybean cultivars by measuring the photosynthetic ability of the middle and lower leaves at the flowering and the seed development stages. The leaf greenness(SPAD value) were ranged as 32-42 at the flowering stage. Also, They were ranged as 25-40 and 38-51 at the fifth leaf and the seventh leaf, respectively. The photosynthetic ability at the flowering and the seed development stage showed significant differences among soybean cultivars, and the photosynthetic ability at the seed development stage showed higher difference among cultivars than the flowering stage. The variation of the photosynthetic ability at the flowering and the seed development stage also was significant among cultivars. The light saturation point at the flowering stage was about 1500 $\mu$mol $m^{-2}$ $s^{-1}$ PAR, and the seed development stage was about 1000 $\mu$mol $m^{-2}$ $s^{-1}$ PAR. The photosynthesis showed the high negative correlation with the leaf area and the positive correlation with the leaf area ratio. Also, photosynthesis at seed development stage showed positive correlation with grain yields but there was not significant between photosynthesis and yields at flowering stage..

• 한국산림과학회지
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• 제63권1호
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• pp.42-50
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• 1984

리기다소나무와 리기테다소나무의 유시(幼時) 및 가계간(家系間)의 생장능력(生長能力)을 예측(豫測)하기 위하여 2년생(年生) 묘목(苗木)을 대상(對象)으로 생장(生長), 광합성능력(光合成能力) 그리고 순동화율(純同化率)을 조사(調査) 비교(比較)하였다. 리기다소나무와 리기테다소나무 모두 순동화율(純同化率)과 광합성능력(光合成能力)의 유전적(遺傳的) 변이(變異)를 볼 수 있었으며, 리기다소나무 3가계(家系)를 제외한 다른 모든 가계(家系)의 광합성능력(光合成能力)은 생장(生長)함에 따라 감소(減少)하는 경향(傾向)을 보였으며 순동화율(純同化率)은 모든 가계(家系)가 감소(減少)하였다. 모든 가계(家系)의 광합성능력(光合成能力)과 순동화율(純同化率)의 순서가 실험기간(實驗期間) 동안 일정하지 않아 어느 한 시기(時期)의 측정치(測定値)로 평가(評價)할 수 없으므로 총광합성(總光合成) 능력(能力)과 총순동화율(總純同化率)로 평가(評價)하였다. 총광합성능력(總光合成能力)과 총순동화율(總純同化率)은 총건중량(總乾重量)과 각각(各各) 0.6394, 0.7998의 상관(相關)을 나타냈다. 따라서 양수종(兩樹種)의 생장력(生長力)은 총광합성능력(總光合成能力)과 총순동화율(總純同化率)의 측정(測定)에 의해 예측(豫測)할 수 있었다. 리기테다소나무의 가계(家系) 경기(京畿) 13호(號) ${\times}7-107$과 리기다소나무의 가계(家系) 경기(京畿) 1호(號)가 수종내(樹種內)에서 가장 우수한 생장능력(生長能力)을 나타냈다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1986년도 춘계 학술대회지
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• pp.24-25
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• 1986

• 한국작물학회:학술대회논문집
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• 한국작물학회 1986년도 춘계 학술대회지
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• pp.22-23
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• 1986

• 한국작물학회지
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• 제43권3호
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• pp.152-156
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• 1998

This study was conducted to elucidate the changes of photosynthetic ability and cation content in barley cultivar seedlings cultured for 10 and 30 days with different NaCl concentrations containing 1/4 Hoagland solutions. At the highest NaCl concentration, the weight of dry matter and the shoot/root ratio (S/R ratio) were decreased. Thus, shoots were affected more than roots by NaCl treatment. The S/R ratio decreased more in 'Neulssalbori' than in 'Bunong' by the NaCl treatment. The. internal $Na^+$ concentration increased greatly with the highest NaCl concentration, but $K^+$ concentration in plants decreased with the highest NaCl treatment. The $Ca^{2+}$ concentration had a small change with NaCl concentrations. Thus $Na^+$/$K^+$and $Na^+$/$Ca^{2+}$ratios increased with the highest concentration. The chlorophyll content (%/dry weight) of seedlings decreased at higher NaCl levels except for Bunong in 30 day old seedlings. The photosynthetic ability decreased only for Neulssalbori in the 10 days NaCl treatment. The stomatal conductance, and transpiration had decreased in the 10 day old seedlings, but not with 30 day old seedlings.

• 한국환경과학회지
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• 제26권10호
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• pp.1147-1153
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• 2017

To maintain a rich biological diversity is important to develop for biomaterial resources such as Korean evergreen broad-leaved tree species, the distribution of which is restricted to the southern part of Korean peninsula. We assessed photosynthetic characteristics of Quercus acuta and Castanopsis sieboldii, the representative evergreen broad-leaved trees in Korea, in order to establish a basis for conservation strategy related to distributional change in evergreen broad-leaved tree species according to climate change. Photosynthetic characteristics were evaluated in the sun and shade leaves of the two species. Sun leaves in both species revealed higher light compensation point and maximum photosynthetic rate compared to the shade leaves. In addition, photosynthetic rate was higher in Q. acuta than C. sieboldii, which was supported by a higher leaf nitrogen content and leaf mass per area. Water use efficiency was also higher in Q. acuta as compared to that in C. sieboldii. Similar photosynthetic rate, however, was shown in photosynthetic response to $CO_2$ concentration in the intercellular space. These results suggest that both species could respond differently to the changing environmental factors including climate change, suggesting the possibility of distributional changes resulting from a differential growth rate.

• 한국환경과학회지
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• 제15권12호
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• pp.1109-1117
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• 2006

To investigate the influence of the mesophyll cells on stomatal opening in response to white light, the segments of isolated epidermis were transferred on partly exposed mesophyll cells of a leaf and stomatal apertures were measured. Transferring the isolated epidermis on partly exposed mesophyll cells of a leaf caused a marked increase on stomatal apertures while stomata in isolated epidermis incubated in MES buffer hardly opened. Mesophyll infiltration with photosynthetic inhibitors (DCMU, DCCD, $NaN_3$) was performed to elucidate the correlation between stomatal apertures and the degree of photosynthetic activity. It was found that transferring the isolated epidermis on partly exposed mesophyll cells of a leaf caused an increase of stomatal apertures depending on the degree of photosynthetic activities. In $NaN_3$ infiltrated leaf discs, transferring the fresh isolated epidermis on partly exposed mesophyll cells of a leaf showed no significant effect, but a slight increase on stomatal apertures. Isolated epidermis alone did not respond to the light properly, but if it was closely contacted with mesophyil cells, the stomata regained the ability of the light response. Therefore, it could be suggested that stomatai apertures were related with the degree of photosynthetic activity in the mesophyll cells.

• 아시안잔디학회지
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• 제11권4호
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• pp.271-280
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• 1997

The short green period of zoysiagrass has been a problem in using for turf. This study was performed to check growth response of several wintergrasses under sunny and shady area in Korea. Wintergrasses of 5 species, 27 cultivars introduced from U.S.D.A., were used in this study. After establishment, two fluctuations of top growth were observed which varied according to the species; first, due to drought in May, second, due to high temperature and humidity from July to August. Red fescues and perennial ryegrasses showed severe growth retardation in sunny area during summer period. Kentucky bluegrasses and tall fescues maintained good Qualities nearly all the year round arid showed slight disease infections. Kentucky bluegrass 'Kenblue' and red fescue 'Agram' grown under shady area showed higher photosynthetic ability than under sunny area, except the temperature range from 30˚C to 40 ˚C under 40,000 lux light in red fescue 'Agram'. And the phorosynthesis was decreased at the temperature range from 35 ˚C to 40 ˚C. Key words: Wintergrass, Top growth, Visual rating, Photosynthesis, Poa pratensis. Festuca arundinacea, Pestuca rubra. Lolium perenne, Agrostis stolonifera.

• 한국작물학회지
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• 제44권4호
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• pp.391-395
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• 1999

Barnyardgrass had relatively higher growth vigor at the earlier growth stage than inbred rice did, showing the 2 fold higher $\alpha$-amylase activity during the periods of germination and large leaf area Expansion with high net photosynthetic rate at the earlier autotrophic stage, but it performed weak growth at the late growth stage. However, the hlybrid rice Shanyou 63 had significantly higher $\alpha$-amylase activity and net photosynthetic rate than that of barnyardgrass, exhibiting heterosis for two physiologica1 traits during the germination (6~12 days) and autotrophic phase, respectively. Accordingly, hybrid rice, Shanyou 63, exhibited heterotic effect at the early growing stage when were presented with barnyardgrass. Shanyou 63 exhibited stronger tillering ability, faster leaf area expansion and higher net photosynthetic rate than those of barnyardgrass.

• 한국작물학회지
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• 제50권6호
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• pp.411-414
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• 2005

초관높이와 도복저항성 차이가 있는 콩 두 품종의 교호재배가 광합성능력과 수량에 미치는 영향을 분석한 결과는 다음과 같았다. 1. 초관의 높이는 황금콩 1열+태광콩 1열에서 가장 높았으며, 도복은 황금콩 1열+태광콩 1열 및 황금콩 1열+태광콩 2열에서 경감 효과가 가장 컸다. 2. 교호재배에서 정엽 및 제 9본엽의 광합성능력은 태광콩열이 단일재배에 비하여 높았으며, 황금콩 정엽의 광합성능력은 낮았다. 3.수량은 황금콩 1열+태광콩 1열이 황금콩 단일재배에 비하여 $17\%$, 태광콩 단일재배에 비하여는 $8\%$증수되었다.