Diabetes mellitus is a major public health concern. Finding a cure for the disease without its side-effects is the objective of modem medicine. The plant is a raw material for these studies. Zygophyllum gemini is a sp...Diabetes mellitus is a major public health concern. Finding a cure for the disease without its side-effects is the objective of modem medicine. The plant is a raw material for these studies. Zygophyllum gemini is a species widely used in Algeria to treat this disease. Our aim is to investigate the antidiabetic activity of aqueous extract and its fractions in induced diabetic Wistar rats by streptozotoein. The three drugs caused a decrease in blood sugar for 14 days. Butanolic fractions （BF） fraction gives significant results on blood glucose after seven days and significant regulating oral glucose tolerance. This preliminary study shows that Z. geslini is endowed with a remarkable antidiabetic activity and that further studies are needed.展开更多
The aim of the present study was to investigate the potential allelopathic effects of different concentrations of Zygophyllum album （donor species） aqueous extract （2.5, 5, 7.5 and 10%） on germination percentage, ...The aim of the present study was to investigate the potential allelopathic effects of different concentrations of Zygophyllum album （donor species） aqueous extract （2.5, 5, 7.5 and 10%） on germination percentage, plumule and radicle length ofBromus tectorum （weed） and Triticum aestivum （crop species） under laboratory conditions to have the greatest inhibitory allelopathic effect on the recipient species in mixed culture compared to that pure culture. The germination percentage, plumule and radicle length ofB. tectorum in mixed culture was completely inhibited at the highest concentration of aqueous extracts of the donor species level the exerted weak measures as affected by the highest concentration level of donor in pure culture. This inhibition was markedly in obvious B. tectorum that is more sensitive to tested donor. The domineering effect of aqueous extract of the donor was more prominent on weeds than crop species. The variant response to the allelopathic substance could be related to the species specific growth regulatory effect of allelochemicals and concentration dependent. There is possibility of using these allelochemicals directly or as structural leads for the discovery and development of environment friendly herbicides to control weeds.展开更多
Understanding how diaspore(hereafter‘seed’)morphology and orientation affect secondary seed dispersal by wind is important to link seed dispersal and post-dispersal processes,such as seed lodging,predation and germi...Understanding how diaspore(hereafter‘seed’)morphology and orientation affect secondary seed dispersal by wind is important to link seed dispersal and post-dispersal processes,such as seed lodging,predation and germination.This study aims to describe the effects of seed morphology and orientation on secondary seed dispersal by wind via mechanistic modelling.We extend the mechanistic model of Schurr et al.(2005)in order to describe how secondary seed dispersal by wind is affected by wind conditions,ground surface,seed morphology and orientation.The model simulates the initial landing orientations,dispersal distances and stopping orientations of individual seeds.To parameterize the model,we measured orientation-specific vertical seed projection and seed lift-off velocity(the wind speed at which a seed starts moving on the ground)of the asymmetric seeds of heterocarpous Zygophyllum xanthoxylon,and determined orientation-specific model parameters that depend on properties of seeds and/or the environment.To validate the model,we conducted wind channel experiments in which we released seeds of Z.xanthoxylon onto a sand-coated tar paper,and recorded the initial landing orientations,dispersal distances and stopping orientations of the seeds.The extended model could precisely predict secondary dispersal distance,and explain up to 99%of variation in the observed proportions of seeds which stopped in various orientations.The model predicts that secondary dispersal distance increases with wind speed and decreases with aerodynamic roughness length,and that there might be a positive correlation between dispersal distance and germination success.展开更多
文摘Diabetes mellitus is a major public health concern. Finding a cure for the disease without its side-effects is the objective of modem medicine. The plant is a raw material for these studies. Zygophyllum gemini is a species widely used in Algeria to treat this disease. Our aim is to investigate the antidiabetic activity of aqueous extract and its fractions in induced diabetic Wistar rats by streptozotoein. The three drugs caused a decrease in blood sugar for 14 days. Butanolic fractions （BF） fraction gives significant results on blood glucose after seven days and significant regulating oral glucose tolerance. This preliminary study shows that Z. geslini is endowed with a remarkable antidiabetic activity and that further studies are needed.
文摘The aim of the present study was to investigate the potential allelopathic effects of different concentrations of Zygophyllum album （donor species） aqueous extract （2.5, 5, 7.5 and 10%） on germination percentage, plumule and radicle length ofBromus tectorum （weed） and Triticum aestivum （crop species） under laboratory conditions to have the greatest inhibitory allelopathic effect on the recipient species in mixed culture compared to that pure culture. The germination percentage, plumule and radicle length ofB. tectorum in mixed culture was completely inhibited at the highest concentration of aqueous extracts of the donor species level the exerted weak measures as affected by the highest concentration level of donor in pure culture. This inhibition was markedly in obvious B. tectorum that is more sensitive to tested donor. The domineering effect of aqueous extract of the donor was more prominent on weeds than crop species. The variant response to the allelopathic substance could be related to the species specific growth regulatory effect of allelochemicals and concentration dependent. There is possibility of using these allelochemicals directly or as structural leads for the discovery and development of environment friendly herbicides to control weeds.
基金The work was supported by the National Natural Science Foundation of China(31770504,32171870)the Special Funds for Fundamental Research in Central Public Research Institutes(CAFYBB2019MA004)+1 种基金the Sino-German(CSC-DAAD)Postdoc Scholarship Program(57165010,2015)the German Research Foundation(DFG)(DynNiche,SCHU 2259/5-1 and SCHU 2259/5-2).
文摘Understanding how diaspore(hereafter‘seed’)morphology and orientation affect secondary seed dispersal by wind is important to link seed dispersal and post-dispersal processes,such as seed lodging,predation and germination.This study aims to describe the effects of seed morphology and orientation on secondary seed dispersal by wind via mechanistic modelling.We extend the mechanistic model of Schurr et al.(2005)in order to describe how secondary seed dispersal by wind is affected by wind conditions,ground surface,seed morphology and orientation.The model simulates the initial landing orientations,dispersal distances and stopping orientations of individual seeds.To parameterize the model,we measured orientation-specific vertical seed projection and seed lift-off velocity(the wind speed at which a seed starts moving on the ground)of the asymmetric seeds of heterocarpous Zygophyllum xanthoxylon,and determined orientation-specific model parameters that depend on properties of seeds and/or the environment.To validate the model,we conducted wind channel experiments in which we released seeds of Z.xanthoxylon onto a sand-coated tar paper,and recorded the initial landing orientations,dispersal distances and stopping orientations of the seeds.The extended model could precisely predict secondary dispersal distance,and explain up to 99%of variation in the observed proportions of seeds which stopped in various orientations.The model predicts that secondary dispersal distance increases with wind speed and decreases with aerodynamic roughness length,and that there might be a positive correlation between dispersal distance and germination success.
