Carotenoids are valuable pigments that have been widely used in food,pharmaceutical,animal breeding and cosmetics industries.Due to the increasing demand for carotenoids of natural origin,the trend for production of c...Carotenoids are valuable pigments that have been widely used in food,pharmaceutical,animal breeding and cosmetics industries.Due to the increasing demand for carotenoids of natural origin,the trend for production of carotenoids by red yeast has become popular.Strain Rhodotorula mucilaginosa CYJ03 was isolated from northern Yellow Sea of China for its carotenoid producing potential.It was found that the whole genome of CYJ03 was 19.03 Mb in size and contained 6301 protein-coding genes including a gene cluster for the carotenoids biosynthesis.The genome sequence would be valuable for exploring the potential biological properties of CYJ03,as well as for facilitating the molecular genetic analysis and the manipulation of carotenoids accumulation in this strain,and for the development of it as an engineered host for carotenoid production.展开更多
Objective:To evaluate the in vitro activity and synergism of the combinations of natural honey and curcuma starch against Rhodotorula mucilaginosa in correlation with total phenolic,flavonoid contents,and diastase act...Objective:To evaluate the in vitro activity and synergism of the combinations of natural honey and curcuma starch against Rhodotorula mucilaginosa in correlation with total phenolic,flavonoid contents,and diastase activity.Methods:The Folin-Ciocalteu test was used to determine the total polyphenols content and the flavonoid content was analyzed using by the aluminum chloride method.The antifungal activity of the natural honey,determined by an agar well diffusion assay and agar incorporation method.Results:Total phenolic content varied from(63.93±0.11)to(95.36±6.08)mg GAE/100 g honey as gallic acid equivalent.Total flavonoids content varied from(5.41±0.04)to(9.94±0.54)mg CE/100g.Diastase activity values were between(7.3±2.8)and(26±2.8).The zone inhibition diameter for the six honey samples without starch ranged between 6 and 20 mm.When starch was mixed with honey and then added to well,a zone inhibition increase diameter 7 and 21 mm.The percentage increase was noticed with each variety and it ranged between 5%and 62.5%.The minimal inhibitory concentrations for the six varieties of honey without starch against Rhodotorula mucilaginosa ranged between 28%and 36%(v/v).When starch was incubated with honey and then added to media,a minimal inhibitory concentration drop has been noticed with each variety.It ranged between 6.66%and 20%(w/v).No significant correlation was established between diastase activity and bioactive compounds.Conclusions:The mixture of curcuma starch and honey could lead to the development of new combination antibiotics against Rhodotorula展开更多
基金supported by the Postdoctoral Applied Re-search Project of Qingdao
文摘Carotenoids are valuable pigments that have been widely used in food,pharmaceutical,animal breeding and cosmetics industries.Due to the increasing demand for carotenoids of natural origin,the trend for production of carotenoids by red yeast has become popular.Strain Rhodotorula mucilaginosa CYJ03 was isolated from northern Yellow Sea of China for its carotenoid producing potential.It was found that the whole genome of CYJ03 was 19.03 Mb in size and contained 6301 protein-coding genes including a gene cluster for the carotenoids biosynthesis.The genome sequence would be valuable for exploring the potential biological properties of CYJ03,as well as for facilitating the molecular genetic analysis and the manipulation of carotenoids accumulation in this strain,and for the development of it as an engineered host for carotenoid production.
基金Supported by the Algerian Ministry of the higher education and scientific research.CNEPRU project approved in 2011/2013(Grant No.F023 2009/009)
文摘Objective:To evaluate the in vitro activity and synergism of the combinations of natural honey and curcuma starch against Rhodotorula mucilaginosa in correlation with total phenolic,flavonoid contents,and diastase activity.Methods:The Folin-Ciocalteu test was used to determine the total polyphenols content and the flavonoid content was analyzed using by the aluminum chloride method.The antifungal activity of the natural honey,determined by an agar well diffusion assay and agar incorporation method.Results:Total phenolic content varied from(63.93±0.11)to(95.36±6.08)mg GAE/100 g honey as gallic acid equivalent.Total flavonoids content varied from(5.41±0.04)to(9.94±0.54)mg CE/100g.Diastase activity values were between(7.3±2.8)and(26±2.8).The zone inhibition diameter for the six honey samples without starch ranged between 6 and 20 mm.When starch was mixed with honey and then added to well,a zone inhibition increase diameter 7 and 21 mm.The percentage increase was noticed with each variety and it ranged between 5%and 62.5%.The minimal inhibitory concentrations for the six varieties of honey without starch against Rhodotorula mucilaginosa ranged between 28%and 36%(v/v).When starch was incubated with honey and then added to media,a minimal inhibitory concentration drop has been noticed with each variety.It ranged between 6.66%and 20%(w/v).No significant correlation was established between diastase activity and bioactive compounds.Conclusions:The mixture of curcuma starch and honey could lead to the development of new combination antibiotics against Rhodotorula
