Abstract:

The chlorophyll fluorescent characteristics of apricot cultivars among different variety populations were investigated for providing scientific basis for choosing high photosynthetic efficiency ecological type or cultivar. The chlorophyll fluorescent parameters of 15 apricot cultivars were measured by a PEA (Plant Efficiency Analyzer) from Hansatech Instruments. The chlorophyll fluorescent parameters showed significant or highly significant difference among cultivars or variety groups. Varieties of north China group were compared with other varieties of groups,the number of active reaction centers on the unit leaf area was more, the excitation energy of QA used to restore was in a high form,the energy of heat dissipation was relatively fewer, the energy transferred into the electron transport chain was higher. Varieties of north China group had higher light energy absorption, transmission and conversion efficiency.