Kalimeris integrifolia Turcz. is a root sucker form perennial herb of Compositae. In die late period of growing season, fresh fleshy radicels grow up above the soil surface to develop root-borne buds, which in turn gr...Kalimeris integrifolia Turcz. is a root sucker form perennial herb of Compositae. In die late period of growing season, fresh fleshy radicels grow up above the soil surface to develop root-borne buds, which in turn grow into ramets and taproot. On the basis of observation on numerous samples, methods to classify the age of ramets and buds for the root sucker herbaceous plant population and to estimate the ages of taproots were established according to their morphology. The age of ramets was classified based on the regeneration times of taproot buds. Ramets developed from new root sucker buds were classified as 1 a. After 1 a ramets died, the ramets reproduced from the taproots were 2 a, and so on. New buds from a root sucker were 0 a buds, other age classes of buds were consistent with that of ramets, i.e. buds produced from taproots of I a ramets were 1 a buds, and so on. In the hay clipping meadows of the Songnen Plains, for K. integrifolia population, there are three age classes of ramets, representing a steady age structure. The maximal age of taproots of ramets is 4 a. Among all age classes, the population productivity of 2 a ramets was the highest, and that of I a ramets was the lowest. The ramet productivity increased with ramet age. During the early period of growing season, the productivity of 3 a ramets was the highest, but after the middle of growing season, I a ramets showed the greatest relative growth rate. The population size and age structure in the next year could be accurately forecasted by the number of fresh roots with budlet and present population in late autumn. The potential population in the bud banks was more than two times of the present population, which may provide sufficient substitution in the future.展开更多
[ Objective] TO observe the in-vitro antibacterial activity of Herba paederiae and Kalimeds indica （ L. ） Sch.-Bip and their antibacterial effect when being used with commonly used antibiotics. [ Method ] Staphyloco...[ Objective] TO observe the in-vitro antibacterial activity of Herba paederiae and Kalimeds indica （ L. ） Sch.-Bip and their antibacterial effect when being used with commonly used antibiotics. [ Method ] Staphylococcus aureus CMCC29178 and Escherichia coli ATCC25922 reference strains were used for the determination of minimal inhibitory concentration （MIC） and fractional inhibitory concentration （FIC） index using the broth microdilution method. [ Result] The aqueous extracts of Herba paederiae and Kalimeris indica （ L. ） Sch. -Bip had certain antibacterial effects on Staphylococcus aureus and Eschedchia coli. Synergistic effects or additive effects at different degrees were observed when they were applied with the commonly used antibiotics. [ Conclusion] Water extraction can be widely used to primarily screen medicinal plants with antibacterial activity.展开更多
文摘Kalimeris integrifolia Turcz. is a root sucker form perennial herb of Compositae. In die late period of growing season, fresh fleshy radicels grow up above the soil surface to develop root-borne buds, which in turn grow into ramets and taproot. On the basis of observation on numerous samples, methods to classify the age of ramets and buds for the root sucker herbaceous plant population and to estimate the ages of taproots were established according to their morphology. The age of ramets was classified based on the regeneration times of taproot buds. Ramets developed from new root sucker buds were classified as 1 a. After 1 a ramets died, the ramets reproduced from the taproots were 2 a, and so on. New buds from a root sucker were 0 a buds, other age classes of buds were consistent with that of ramets, i.e. buds produced from taproots of I a ramets were 1 a buds, and so on. In the hay clipping meadows of the Songnen Plains, for K. integrifolia population, there are three age classes of ramets, representing a steady age structure. The maximal age of taproots of ramets is 4 a. Among all age classes, the population productivity of 2 a ramets was the highest, and that of I a ramets was the lowest. The ramet productivity increased with ramet age. During the early period of growing season, the productivity of 3 a ramets was the highest, but after the middle of growing season, I a ramets showed the greatest relative growth rate. The population size and age structure in the next year could be accurately forecasted by the number of fresh roots with budlet and present population in late autumn. The potential population in the bud banks was more than two times of the present population, which may provide sufficient substitution in the future.
基金funded by the Student Innovation Project of Southwest University for Nationalities in 2011 ( F201113001)
文摘[ Objective] TO observe the in-vitro antibacterial activity of Herba paederiae and Kalimeds indica （ L. ） Sch.-Bip and their antibacterial effect when being used with commonly used antibiotics. [ Method ] Staphylococcus aureus CMCC29178 and Escherichia coli ATCC25922 reference strains were used for the determination of minimal inhibitory concentration （MIC） and fractional inhibitory concentration （FIC） index using the broth microdilution method. [ Result] The aqueous extracts of Herba paederiae and Kalimeris indica （ L. ） Sch. -Bip had certain antibacterial effects on Staphylococcus aureus and Eschedchia coli. Synergistic effects or additive effects at different degrees were observed when they were applied with the commonly used antibiotics. [ Conclusion] Water extraction can be widely used to primarily screen medicinal plants with antibacterial activity.
