차광처리가 더덕의 광합성율과 생육에 미치는 영향

국문 초록 (Abstract)

차광처리가 더덕의 생육 및 광합성에 미치는 영향을 구명하기 위하여 본 실험을 수행하였던 바, 그 결과는 다음과 같다. 1. 차광처리에 의하여 만장과 엽면적은 증가하였으나, 덩굴 및 잎의 건물증은 감소하였다. 2. 차광처리에 의하여 엽록소함량 및 비엽면적은 증가하였으나, 엽위별 일정한 경향이 없었고 상위엽보다는 하위엽에서그 증가 정도가 컸다. 3. 광합성속도와 기공전도도는 광 강도가 강할수록 또 차광일수가 경과할수록 증가하는 경향이었으며 그 증가 정도는 대체로 하위엽에서 크게 나타났다.

다국어 초록 (Multilingual Abstract)

The Condonopsis lanceolata Trautv. was planted in field to investigate the effect of afterwards shading in the condition of sun light of fifty six percent on the characteristics of photosynthesis according to leaf position at flowering stage. The vine length and leaf area were increased with shading treatment in comparison with that of non-shading. Dry weight of leaf and vine indicate opposite tendency with the result above. SLA (specific leaf area) was much more increased in shaded leaves than that obtained from non-shading treatment. The shaded leaves of plant show a higher SPAD value than that of non-shaded leaves. The net photosynthetic rate and stomatal conductance were increased as the PAR was increased. And it is the maximum valve (PAR of 700-1000 μmol/m2/s of PAR) of all leaves. Overnurse and light saturation point of the Condonopsis lanceolata Trautv. shading-treated was improved in comparison with control as net photosynthetic rates of leaves positioned on each part of the stem was increased.

참고문헌 (Reference)

1 "和田義春 渡和之" 65-66, 三浦邦夫1990.イネ葉身の老化におよぼす光條件の影響.日作紀59

2 "studies on dry matter production of soybeanplant. Japan J Crop Sci. 38" 74-90, 1969

3 "Photosyntheticcharacteristics of rice leaves aged under different irradiancesfrom full expansion through senescence Plant Physiol. 97" 1287-1293, 1991

4 "Growth and aromatic constituents of wild and domesticated Condonopsis lanceolata grown at two different regions" 40 (40): 587-593, 1995

5 "Effects of shading and orgaric matter applications on growth and aromatic constituents of Codonpsis lanceolata" 41 (41): 496-504, 1996b

6 "Effects of environmental conditions of long andshort duration on subsequent leaf CO2 assimilation rates of riceplant under a definite standard condition. Japan J. Crop sci. 39" 370-375, 1970

7 "Ecophysiological responses to weak light condition in soybean. 2. Multiple regression analysis on the changes of photosynthetic rate affected by shading treatment" 36 : 51-57, 1995b

8 "Ecophysiological responses to weak light condition in soybean. 1. Effects of shading treatment at different growth stage on characteristics of plant and photosynthesis" 36 : 41-49, 1995a

9 "Diurnal change inspecific leaf weight of Medicago sativa L. and Zea mays L.Crop Sci. 12" 576-578, 1972

10 "Agronomic characteristics and aromatic compositions of korean wild Codonpsis lanceolata collections cultivated in field" 41 (41): 188-199, 1996a

11 "Adaptive regulation ofphotosynthesis in rice plant to weak light condition and thecontribution of root activity to regulation mechanism. Japan J.Crop sci. 58" tsu (tsu): 74-83, 1989