Photoresponse Characteristics and Daily Dynamic Analysis of Photosynthetic Physiology for Three Kind of Bamboo

摘要

Three-year old bamboo species of Bitter bamboo, Bambusa officinalis, Chimonobambusa communis were selected as the experimental material for testing physiological characteristics with Licor-6400. The results indicated that in the light saturation point, the value of Bambusa officinalis and Chimonobambusa communis were the same (1800μmol·m~(-2)s~(-1)), which was larger than that of Bitter bamboo. The sequence of LCP was in an order of Bitter bamboo (8.04μmol·m~(-2)s~(-1)) < Bambusa officinalis (10.2μmol·m~(-2)s~(-1)) < Chimonobambusa communis (29.81μmol·m~(-2)s~(-1)). The diurnal change of net photosynthetic rate of these three bamboo species could be expressed as double-peek curve, exhibiting a clear midday depression respectively. Bambusa officinalis displayed the highest daily average value in net photosynthetic rate (6.47μmol·mol~(-1)), and then Chimonobambusa communis (6.16μmol·mol~(-1)), finally Bitter bamboo (4.93μmol·mol~(-1)).