Photosynthetic Diurnal Variation of Soybean Cultivars with High Photosynthetic Efficiency |
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| Authors: | MAN Wei-Qun DU Wei-guang ZHANG Gui-ru LUAN Xiao-yan GE Qiao-ying HAO Nai-bin CHEN Yi |
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| Institution: | 1. Soybean Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086,P.R.China
2. Institute of Botany, Chinese Acodemy of Sciences, Beijing 100093,P.R.China |
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| Abstract: | The photosynthetic characters were investigated among soybean cultivars with high photosynthetic efficiency and high yield. The results indicated that: 1) There were significant differences in photosynthetic rate (Ph) and dark respiration rate (DR) under saturation light intensity and appropriate temperature.2) There were a little difference in light compensation point among them. Photo flux density (PFD) were mong the cultivars. Diurnal variation of Pn was shown a curve with two peaks. 4) The cultivars with high photosynthetic efficiency were subjected less to photoinhibition than that with high yield. Critical temperatures of photoinhibition in high photosynthetic efficiency cultivars were higher than that of high yield. |
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| Keywords: | Soybean Photosynthetic efficiency Photoinhibition Diurnal variation |
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