To understand the ecophysiological adapta-tion of Lilium"Oriental Hybrids",which are grown for their commercial bulbs,the gas exchange,leaf N and chlorophyll content of the three varieties were investigated ...To understand the ecophysiological adapta-tion of Lilium"Oriental Hybrids",which are grown for their commercial bulbs,the gas exchange,leaf N and chlorophyll content of the three varieties were investigated in the central areas of the Yunnan Province.Among the three varieties,light-saturated photosynthetic rate at ambient CO_(2)(Amax)of Tiber was the highest,while that of Siberia was the lowest.The difference in the Amax was related to the carboxylation efficiency(CE),leaf mass per unit area and leaf N content per mass,which indicated that their photosynthetic capacity was influenced by the activity and/or the quantity of Rubisco.The three vari-eties had lower photosynthetic saturation points and pho-tosynthetic compensation points,but the photosynthetic rates were not decreased up to 2000 μmol·m^(-2)·s^(-1) of the light intensity.This indicates that the three varieties had broad adaptability to light intensity.There were signifi-cant differences in the photosyn thetic optimum temper-ature among the three varieties.Siberia had the highest photosynthetic optimum temperature(25.5℃-34.9℃),and is likely to grow well in warm areas.Sorbonne had the lowest photosynthetic optimum temperature(19.3℃-25.6℃),and its growth is favored in cool areas.Tiber can maintain a high photosynthetic rate within a wide range of temperature.Therefore,Tiber is the most suitable variety for the climate in the central areas of the Yunn an Province,China.展开更多
文摘To understand the ecophysiological adapta-tion of Lilium"Oriental Hybrids",which are grown for their commercial bulbs,the gas exchange,leaf N and chlorophyll content of the three varieties were investigated in the central areas of the Yunnan Province.Among the three varieties,light-saturated photosynthetic rate at ambient CO_(2)(Amax)of Tiber was the highest,while that of Siberia was the lowest.The difference in the Amax was related to the carboxylation efficiency(CE),leaf mass per unit area and leaf N content per mass,which indicated that their photosynthetic capacity was influenced by the activity and/or the quantity of Rubisco.The three vari-eties had lower photosynthetic saturation points and pho-tosynthetic compensation points,but the photosynthetic rates were not decreased up to 2000 μmol·m^(-2)·s^(-1) of the light intensity.This indicates that the three varieties had broad adaptability to light intensity.There were signifi-cant differences in the photosyn thetic optimum temper-ature among the three varieties.Siberia had the highest photosynthetic optimum temperature(25.5℃-34.9℃),and is likely to grow well in warm areas.Sorbonne had the lowest photosynthetic optimum temperature(19.3℃-25.6℃),and its growth is favored in cool areas.Tiber can maintain a high photosynthetic rate within a wide range of temperature.Therefore,Tiber is the most suitable variety for the climate in the central areas of the Yunn an Province,China.
