Comparative study on photosynthetic characteristic of 5 Camellia oleifera clones in Hainan province
In order to study high and low of photosynthetic efficiency and differences of photosynthetic characteristics between different clones of Camellia oleifera in Hainan,screening of high photosynthetic efficiency of clones of Camellia oleifera in Hainan province.The photosynthesis diurnal changes,photosynthetic-light response curve and photosynthetic-CO2 response curve for net photosynthetic rate of 5 Camellia clones in hainan:‘Hainan 2’,‘Hainan 6’,‘Hainan 9’,‘Hainan 18’ and ‘hainan 19’ were measured with Li-6400 photosynthetic instrument under field conditions.The results showed that:Net photosynthetic rate (Pn) of ‘Hainan 2’ changed as single peak curve,while other four kinds of clones in the diurnal variation of net photosynthetic rate were changed as doublepeak curve;Transpiration rate (Tr) of ‘Hainan 18’ changed as single peak curve,while other four kinds of clones in the diurnal variation of net photosynthetic rate were double-peak curve,and the peak appear at 9:00 am or at 15:00 pm;Stomatal conductance (Gs) of ‘Hainan 18’ and ‘Hainan 2’ changed as single peak curve,while ‘Hainan 9’,‘Hainan 19’ and ‘Hainan 6’ had same change as net photosynthetic rate;The light compensation points and light saturation points of ‘Hainan 2’ were the highest while ‘Hainan 19’ were the lowest in five Camellia oleifera clones in Hainan.The CO2 compensation point of 5 Camellia oleifera clones in Hainan was high,consistent with the photosynthetic characteristics of C3 plants.The order in daily change of average net photosynthetic rate of 5 Camellia oleifera clones taken as ‘Hainan 19’ ＞ ‘Hainan 18’ ＞ ‘Hainan 9’ ＞ ‘Hainan 2’ ＞ ‘Hainan 6’.The impact order that main ecological physiological of net photosynthetic value of 5 Camellia oleifera clones was stomatal conductance ＞photosynthetic active radiation ＞ transpiration rate ＞ intercellular CO2 concentration.
NETL
NSTL
万方数据
维普
