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Effects of Shading Treatments on Photosynthetic rate and Growth in Codonopsis lanceloata Trautv.  

Won, Jun-Yeon (Joongbu University)
Lee, Chung-Yeol (School of Bioresource Science, Pusan National University)
Publication Information
Korean Journal of Medicinal Crop Science / v.15, no.3, 2007 , pp. 152-156 More about this Journal
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 ${\mu}$mol/m$^2$/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.
Keywords
Codonopsis lanceolata Trautv; growth; leaf position; light intensity; photosynthesis; shading treaaent; SPAD; stomatal conductance;
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  • Reference
1 Lee PS, Kim SK, Min GG, Cho JH, Choi BS, Lee SC, Kim KU (1996a) Agronomic characteristics and aromatic compositions of korean wild Codon psis lanceolata collections cultivated in field. Korean J. Crop Sci. 41(2):188-199
2 中條博良, 淺野 廣 (1973) 分けつの遮光が數種故草の生育におよほす影響. 日草誌 19:276-282
3 三浦邦夫, 石井龍二 (1983) ユンニヤクの物質生産に關する硏究. 第6報 生育 光環境が光合成 . 蒸散速度 . 乾物生産特性および體形におよほす影響. 日作紀 52(別2):225-226
4 Chatterson NJ, DR Lee, RH Hageman (1972) Diurnal change in specific leaf weight of Medicago sativa L. and Zea mays L. Crop Sci. 12:576-578   DOI
5 Lee PS, Kim SK, Choi BS, Lee SC, Kim KU (1995) Growth and aromatic constituents of wild and domesticated Condonopsis lanceolata grown at two different regions. Korean J. Crop Sci. 40(5):587-593
6 Lee CY, Tsuno Y, Nakano J, Yamaguchi T (1995b) Ecophysiological responses to weak light condition in soybean. 2. Multiple regression analysis on the changes of photosynthetic rate affected by shading treatment. Japan Rep.Chugoku Br. Crop Sci. 36:51-57
7 Lee PS, Kim SK, Nam KS, Choi BS, Lee SC (1996b) Effects of shading and orgaric matter applications on growth and aromatic constituents of Codonpsis lanceolata. Korean J. Crop Sci. 41(4):496-504
8 Sato K (1970) Effects of environmental conditions of long and short duration on subsequent leaf $CO_2$ assimilation rates of rice plant under a definite standard condition. Japan J. Crop sci. 39:370-375   DOI
9 Kumura A (1969) studies on dry matter production of soybean plant. Japan J Crop Sci. 38:74-90   DOI
10 村田吉男 (1961) 水稻の光合成とその栽培學的意義に關する硏究. 農技硏報. D9:1-10
11 和田義春, 渡辺和之, 三浦邦夫 1990. イネ葉身の老化におよぼす光倏牛の影響. 日作紀 59(別2):65-66
12 Lee CY, Tsuno Y Nakano J, Yamaguchi T (1995a) Ecophysiological responses to weak light condition in soybean. 1. Effects of shading treatment at different growth stage on characteristics of plant and photosynthesis. Japan Rep.Chugoku Br. Crop Sci. 36:41-49
13 Tsuno Y, Yamaguchi T (1989)Adaptive regulation of photosynthesis in rice plant to weak lignt condition and the contribution of root activity to regulation mechanism. Japan J. Crop sci. 58(1):74-83   DOI
14 Hidema J, A Makino, T Mae, K Ojima (1991) Photosynthetic characteristics of rice leaves aged under different irradiances from full expansion through senescence Plant Physiol. 97:1287-1293   DOI   ScienceOn