Comparison of Photosynthetic Characteristics Among Plants of Four Kaempferia Species
In order to study the photosynthetic characteristics of Kaempferia plants, the diurnal variation of leaf net photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency were detected, the chlorophyll fluorescence parameters, chlorophyll contents and specific leaf dry mass of 4 Kaempferia species, Kaempferia galanga, Kaempferia rotunda, Kaempferia elegans, and Kaempferia parviflora, planted under greenhouse conditions were analyzed. The results showed that the diurnal variation of net photosynthetic rates of all the four Kaempferia species tended to rise first and then decrease.The diurnal variation of transpiration rates of K. galanga, K.rotunda and K.elegans also showed a first rising and then decreasing trend,but the diurnal variation of transpiration rate of K.parviflora had a bimodal curve. The diurnal variation of stomatal conductance of K. galanga and K. rotunda displayed a unimodal curve, while the diurnal variation of stomatal conductance of K. elegans and K. parviflora did a bimodal curve. The diurnal variation of water use efficiency of K. galanga, K. elegans and K. parviflora showed a bimodal curve,but the diurnal variation of water use efficiency of K.rotunda showed a trimodal curve. The initial fluorescence of the leaves was in the order of K. rotunda>K. galanga>K. parviflora>K. elegans. Both the maximum fluorescence and maximum variable fluorescence of the leaves were in the order of K. rotunda>K. parviflora>K. galanga>K. elegans. The chlorophyll a, chlorophyll b and total chlorophyll contents of the leaves were in the order of K. rotunda>K. parviflora>K. elegans>K. galanga. The specific leaf dry mass was in the order of K.galanga=K.elegans>K.rotunda>K.parviflora.Among the four Kaempferia species, the diurnal variation of leaf net photosynthetic rate and stomatal conductance of K. rotunda were the highest, while the diurnal variation of leaf transpiration rate of K. elegans was the highest. This study provided references for physiological research and water management of Kaempferia plants.
NETL
NSTL
万方数据
维普
