光强对烤烟光合作用影响的初步研究

Effect of Light Intensity on Photosynthesis in Flue-cured Tobacco

摘要: 研究了不同光强对烤烟气孔导度(Gs)、光合速率(Pn)、胞间CO₂浓度(Ci)及叶片蒸腾速率(Tr)的影响。结果表明:随着光合有效辐射的提高,烤烟气孔导度、净光合速率和蒸腾速率均增加,而胞间CO₂浓度则下降,品种间变化趋势相似。

Abstract: Effect of light intensity on photosynthesis in flue-cured tobacco was studied in tobacco cultivars CB-l, K326,Yanyan97. The results showed that with the light intensity increased, intercellular CO₂ concentration (Ci) was decreased, transpiration rate(Tr), stomatal conductance(Gs) and net photosynthetic rate (Pn) were increased. But the trend Of change among the varieties was similar.