Rhodiola sachalinensis growing in the different habitats, Xiaotianchi plot (altitude 1800 m), Tree line plot (altitude 2000 m) and Tianwenfeng plot (altitude 2325 m), of Changbai Moutain (northern slop) were transplan...Rhodiola sachalinensis growing in the different habitats, Xiaotianchi plot (altitude 1800 m), Tree line plot (altitude 2000 m) and Tianwenfeng plot (altitude 2325 m), of Changbai Moutain (northern slop) were transplanted to Harbin Experimental Forest Farm for measuring its characteristic of gas exchange. The study results indicated that the growth state and gas exchange characteristics ofRh. sachalinensis growing in different habitats varied markedly. The plants transplanted from Tianwenfeng plot had the highest values in net photosynthesis rate (Pn) and transpiration rate (Tr), those transplanted from Tree line plot shows the second, and those transplanted rom Xiaotianchi plot had the lowest values. The variance existed in transplanted plants was the same as shown in the field. From the result it can be extrapolated that the difference of Pn and Tr existed inRh. sachalinensis transplanted from different habitats is depend not only on the environmental factors, but on the variance of physiological characteristic of plant itself.展开更多
Rhodiola sachalinensis growing in the different habitats, such as Xiaotianchi plot (altitude 1800 m), Tree line plot (altitude 2000 m) and Tianwenfeng plot (altitude 2325 m) of Changbai Mountain (northern slop) were t...Rhodiola sachalinensis growing in the different habitats, such as Xiaotianchi plot (altitude 1800 m), Tree line plot (altitude 2000 m) and Tianwenfeng plot (altitude 2325 m) of Changbai Mountain (northern slop) were transplanted to Harbin Experimental Farm for determining its gas exchange. The study results indicated that the diurnal changes of gas exchange ofRh. sachalinensis transplanted from different habitats were still different though the morphological appearance of the newly sprouted above-ground part had become more similar. For net photosynthesis rate (Pn), stomatal conductance (Gs) and apparent quantum yield (AQY), the diumal change curves ofRh. sachalinensis transplanted from the three plots were similar, but the data value were different. For the dark respiration rate (Rd), transpiration rate (Tr) and water use efficiency (WUE), diurnal change curves of the three plots were obviously different.展开更多
To discuss the inhibiting mechanism of water extraxt solution from Rhodiola on theTyrosinase activity.Tyrosinase inhibiting rate is determined and Lineweaver-Burk curve is made by determining the tyrosinase activity b...To discuss the inhibiting mechanism of water extraxt solution from Rhodiola on theTyrosinase activity.Tyrosinase inhibiting rate is determined and Lineweaver-Burk curve is made by determining the tyrosinase activity before and after drug（water extract solution） interference oxidant of method,on which we deduce the inhibiting types of the drug.The water extract solutioncan inhibit the tyrosinase activity remarkably with the half inhibiting concentration IC50 3.9g/L.The water extract solution can inhibitthe tyrosinase activity and it is thenoncompetitive inhibitor of tyrosinase.展开更多
文摘Rhodiola sachalinensis growing in the different habitats, Xiaotianchi plot (altitude 1800 m), Tree line plot (altitude 2000 m) and Tianwenfeng plot (altitude 2325 m), of Changbai Moutain (northern slop) were transplanted to Harbin Experimental Forest Farm for measuring its characteristic of gas exchange. The study results indicated that the growth state and gas exchange characteristics ofRh. sachalinensis growing in different habitats varied markedly. The plants transplanted from Tianwenfeng plot had the highest values in net photosynthesis rate (Pn) and transpiration rate (Tr), those transplanted from Tree line plot shows the second, and those transplanted rom Xiaotianchi plot had the lowest values. The variance existed in transplanted plants was the same as shown in the field. From the result it can be extrapolated that the difference of Pn and Tr existed inRh. sachalinensis transplanted from different habitats is depend not only on the environmental factors, but on the variance of physiological characteristic of plant itself.
文摘Rhodiola sachalinensis growing in the different habitats, such as Xiaotianchi plot (altitude 1800 m), Tree line plot (altitude 2000 m) and Tianwenfeng plot (altitude 2325 m) of Changbai Mountain (northern slop) were transplanted to Harbin Experimental Farm for determining its gas exchange. The study results indicated that the diurnal changes of gas exchange ofRh. sachalinensis transplanted from different habitats were still different though the morphological appearance of the newly sprouted above-ground part had become more similar. For net photosynthesis rate (Pn), stomatal conductance (Gs) and apparent quantum yield (AQY), the diumal change curves ofRh. sachalinensis transplanted from the three plots were similar, but the data value were different. For the dark respiration rate (Rd), transpiration rate (Tr) and water use efficiency (WUE), diurnal change curves of the three plots were obviously different.
文摘To discuss the inhibiting mechanism of water extraxt solution from Rhodiola on theTyrosinase activity.Tyrosinase inhibiting rate is determined and Lineweaver-Burk curve is made by determining the tyrosinase activity before and after drug（water extract solution） interference oxidant of method,on which we deduce the inhibiting types of the drug.The water extract solutioncan inhibit the tyrosinase activity remarkably with the half inhibiting concentration IC50 3.9g/L.The water extract solution can inhibitthe tyrosinase activity and it is thenoncompetitive inhibitor of tyrosinase.
