旺长期烤烟叶片主要光合生理指标分析

Analysis of Leaf Photosynthetic Physiology Index of Flue-cured Tobacco During Fast Growing Period

摘要: 田间条件下对烤烟旺长期下、中、上部位叶片主要光合生理指标进行了测定。结果表明:3个部位的烟叶光饱和时光合速率与细胞间隙CO₂浓度(Ci)饱和时光合速率比值(A₃₅₀/J_max)和光系统Ⅱ潜在活性(Fv/Fo)以中部叶最高,叶片气孔限制值(Ls)则以下部叶最高。不同烟叶部位之间叶片A₃₅₀/J_max、Ls、Fv/Fo的差异均达极显著水平;A₃₅₀/J_max与Fv/Fo之间呈极显著正相关,Ls与叶位之间呈显著负相关。

Abstract: The main photosynthetic physiology indexes of upper,middle and lower leaves of flue-cured tobacco during fast growing period in fields were analyzed.The results indicated that the middle leaves had the highest A₃₅₀/J_max and Fv/Fo,and lower leaves had the highest Ls.A₃₅₀/J_max,Ls and Fv/Fo of leaves of different stalk positions differed extremely significantly.There was an extremely significant positive correlation between A₃₅₀/J_max and Fv/Fo,and a significant negative correlation between Ls and stalk position.