A Comparative Study Of The Photosynthetic Characteristics Of Different Varieties Of Chinese Prickly Ash

Chinese prickly ash, belonging to the genus Zanthoxylum L, is one species of Rutaceae plants, have higher edible, medicinal and ecological value. At present, the study of Chinese prickly ash mainly concentrated in extracting effective components, medicinal value and cultivation technology, molecular genetic, Chinese prickly ash cultivation mainly garden planted, and field management mainly by water and fertilizer, which is very extensive. In this experiment, we used eight Chinese prickly ash as test materials, through the study on the photosynthetic characteristics,to provide theoretical basis and technical guidance for Chinese prickly ash pepper breeding, tissue culture.The main results were as follows:1. Different photosynthetic characteristics of Chinese prickly ash in different phenological periods.(1) Fuguhuajiao, Wucihuajiao, Wududahongpao, Dangcunwuci, Shizitou, Qinanyihao’s Pn(net photosynthetic rate) of each phenological period daily variation shows bimodal type;Fengxiandahongpao,Hanchengdahongpao only in coloring period Pn diurnal variation shows bimodal type, and the flowering period, young fruit period, mature period Pn diurnal variation type is unimodal.The first peak of bimodal type appeared at 12:00, the second peak appeared at 16:00PM,photosynthetic "noon break" phenomenon exists.The peak of unimodal type was around 12:00.(2) The Tr(transpiration rate) changes of the Fengxiandahongpao, Fuguhuajiao in the phenological period were unimodal type, peak appeared at 12:00 ~ 15:00;Hanchengdahongpao and Shizitou Tr daily variation is bimodal type in different periods.The first, second peak in flowering period and coloringg period respectively appeared at 10:00and 14:00, The first, second peak in young fruit period and mature period respectively at10:00 and 16:00; Tr of Shizitou and Wucihuajiao in the mature period shows bimodal type,the daily change in flowering period, young fruit period, coloring period is unimodal. in young fruit period, mature period,Qinanyihao Tr change shows bimodal type, while in flowering period, coloring period Tr is unimodal type; in the flowering period, coloring period, mature period, Tr of Dangcunwuci shows bimodal type, the daily change in young fruit period is unimodal type.(3) Ci(intercellular CO2 concentration) daily variation of Fengxiandahongpao,Fuguhuajiao, Qinanyihao in each phenological period all showed a trend of " rise after falling first ", Hanchengdahongpao, Shizitou, Wucihuajao, Dangcunwuci, Wududahongpao Ci changes in the phenological period is the trend of " rise after falling first then rise "; Gs(stomatal conductance) change of Fengxiandahongpao in phenological period showed a trend of " rise after falling first ".2. Studied the light response in flowering period, under different PAR gradient and other photosynthetic parameters, correlation analysis showed that PAR and Pn,Tr,Gs,WUE were significantly correlated(p <0.05) or significant correlation(p <0.01); between Ci and PAR there was a significant negative correlation(p <0.05). Correlation analysis under different PAR gradient Pn and other photosynthetic parameters, between Pn and Ci had a very significant negative correlation(p <0.01); There was a significant positive correlation Pn and Gs, Tr(p <0.05). Eight Chinese prickly ash photosynthetic rate as follows: Shizitou >Dangcunwuci> Qianyihao > Fengxiandahongpao > Wucihuajiao > Fuguhuajiao>Hanchengdahongpao> Wududahongpao.3. According to the eight Chinese prickly ash light response and CO2 response parameters in fruiting period analysis shows that Fengxiandahongpao, Wucihuajiao,Fuguhuajiao, Qianyihao AQY are biger, this is meaning their have a big light conversion;Dangcunwuci, Shizitou, Hanchengdahongpao, Wududahongpao, have a smaller AQY.Fengxiandahongpao, Dangcunwuci have low light compensation point, strong ability to adapt to low light environment.4.Eight Chinese prickly ash leaves’ ribulose 1,5-bisphosphate carboxylase content size Fengxiandahongpao > Qianyihao > Dangcunwuci > Wucihuajiao > Hanchengdahongpao >Shizitou > Fuguhuajiao > Wududahongpao. Ability to adapt to low CO2 concentration is Qianyihao > Fengxiandahongpao > Wududahongpao > Hanchengdahongpao >Fuguhuajiao > Wucihuajiao > Dangcunwuci > Shizitou.