Study On Changes Of Physiology And Biochemistry During Its Leafcolour Transformation Of Acer

Acer rubrum 'Red Sunset'和 Acer rubrum 'October Glory', Acer platanoides 'Crimson Sentry'were introduced from Canada during 2003～2005.And then 8 different treatments of soil were designed.Changes of physiology and biochemistry of soil and leaves were studied.The results showed as follows:1 Introductions of Acer rubrum 'Red Sunset'were succeeded. Introductions of A. rubrum 'October Glory'and A. platanoides 'Crimson Sentry'were failed.,for leafcolour of 'October Glory' didn't transformate during autumn and 'Crimson Sentry'didn'thrive during summer.2 Different variety need different mineral nutrition. To 'Red Sunset', NO.8 is the best one to growth and leafcolour.To 'October Glory', NO.7 is the best one. To 'Crimson Sentry',NO. 1 is best to leafcolour, however, NO.4 and 7 are better to growth.3 In vitro experiments indicate that the anthocyanin production of Acer platanoides is significantly lower in 0.1mol/L HCL than that in methanol containing 1% HCL or ethanol containing 1% HCL. 5h～6h is properly time of extracting. The anthocyanin of A. platanoides is sensitive to light and temperature. With pH increasing, the color of anthocyanin extracted changes from red to brown. The characteristic absorption spectra of anthocyanin are decreasing.4 The photosynthetic characteristics of leaves in Acer were studied by using the Li-6400 portable photosynthesis system. The results were as follows: (1) The light compensate and saturated point of 'Red Sunset'and'October Glory ' was 20～ 50μmol·m^-2·s^-1 and 1500μmol·m^-2·s^-1 , of Crimson Sentry'was 0～20μmol·m^-2·s^-1...