Thinning is an important activity employed in forest management. To date, studies have mainly focused on the effects of thinning on the growth of trees during the same thinning period. In this study, plantation Pinus ...Thinning is an important activity employed in forest management. To date, studies have mainly focused on the effects of thinning on the growth of trees during the same thinning period. In this study, plantation Pinus massoniana Lamb. near maturity were thinned at varying intensities and an economically important species, Cinnamomum cassia Presl., was planted beneath the thinned canopy. The aim of the study was to explore the effects of the extent of thinning on the essential oil content and its components of C. cassia in different parts of the plant, as well as the economic feasibility of the P. massoniana–C.cassia management model. Thinning significantly reduced the oil yield in the bark and branches of C. cassia, but hardly impacted the oil yield from C. cassia leaves compared with pure C. cassia forest(CK). Among the different thinning treatments, both light(T.4) and extensive(T.1)thinning reduced the oil yield of C. cassia bark and new branches. The concentrations of the main aldehydes differed in different parts of the plant and were affected by the extent of thinning. The influence on cinnamaldehyde in the bark was minor, but was much greater in the branches and leaves. Both the oil yield and content of cinnamaldehyde showed that moderate(T.3) thinning was more favorable than other thinning models. These results not only provide a potentially promising model for the transformation of low–yield artificial pure forests of P. massoniana in the future, but also offer a reference for the management of artificial mixed stands.展开更多
An improved solvent-free microwave extraction(ISFME) was used for the extraction of essential oil from dried Cinnamomum cassia Presl. Two kinds of solid microwave absorption media[carbonyl iron powder(CIP) and graphit...An improved solvent-free microwave extraction(ISFME) was used for the extraction of essential oil from dried Cinnamomum cassia Presl. Two kinds of solid microwave absorption media[carbonyl iron powder(CIP) and graphite powder(GP)] were used. When ISFME was applied, the heating rate was enhanced and the extraction time was obviously shorter than that consumed in conventional solvent-free microwave extraction(CSFME). Twenty-eight kinds of compounds in the essential oil were identified, and the total content fractions of the compounds obtained by CIP-ISFME, GP-ISFME, CSFME, and hydrodistillation(HD) were 96.65%, 96.06%, 97.22%, and 96.29%, respectively. The compounds in the essential oil obtained from Cinnamomum cassia Presl. by ISFME, CSFME, and HD were compared and the quantity of the essential oil was almost the same. The ISFME has been proved to be a feasible way to extract essential oil from dried samples, and there are several obvious advantages in ISFME over those of HD and CSFME, for example, shorter extraction time(30 min) and lower energy consumption.展开更多
OBJECTIVE Cinnamomum cassia has been used in traditional medicine in East Asian countries to treatallergic disease.Previous studies have demonstrated that C.cassiainhibits the development of mite antigen-induced skin ...OBJECTIVE Cinnamomum cassia has been used in traditional medicine in East Asian countries to treatallergic disease.Previous studies have demonstrated that C.cassiainhibits the development of mite antigen-induced skin lesions in NC/Nga mice by suppressing the Thelper 2cell response.The objective of this study is to investigate whether C.cassia has an efficient inhibition on systemic anaphylaxis and contact hypersensitivity in mice.METHODS To induce systemic anaphylaxis,mice were injected intraperitoneally with compound 48/80.Mortality was monitored for 1h after the injection.Contact hypersensitivity reaction was induced by topical application of 2,4-dinitrofluorobenzene(DNFB)to the ears of mice.After DNFBchallenge,ear thickness was measured 0,24 and 48h.RESULTS We discovered that C.cassia significantly inhibited compound 48/80-induced anaphylaxis and DNFB-induced ear swelling.Compound 48/80-induced anaphylaxiswas completely inhibited at the dose of 60mg·kg-1 body weight.Ear swelling at 24 h after DNFB-challenge was significantly less than that in the control group(0.16±0.03 vs.0.32±0.03 mm,P<0.01),while C.cassia was administered at the dose of 200mg·kg-1.CONCLUSION These findings indicate that C.cassiasuppresses allergic reactions,thus has potential value for mitigation of atopic dermatitis.展开更多
Objective:To dig out potential of Cinnamomum cassia Presl to be developed into health tonics in regulating blood glucose from effectiveness and marketing,we designed this research.Methods:We searched from PubChem,CNKI...Objective:To dig out potential of Cinnamomum cassia Presl to be developed into health tonics in regulating blood glucose from effectiveness and marketing,we designed this research.Methods:We searched from PubChem,CNKI,Web of Science,associated official websites,and other available resources to obtain information about Cinnamomum cassia Presl in blood glucose regulation.Results:Both volatile and non-volatile components of Cinnamomum cassia Presl were revealed as material foundation in blood glucose regulation.In addition,not only the production and utilization of blood glucose would be conditioned by Cinnamomum cassia Presl,but also the risk factors to diabetes as well as complications could be interfered by Cinnamomum cassia Presl.China,America,Australia,Canada and other countries have developed Cinnamomum cassia Presl-associated products to maintain healthy blood glucose level.Conclusion:Cinnamomum cassia Presl is effective in blood glucose regulation,and it’s of great potential to further develop Cinnamomum cassia Presl health products in the prevention and treatment of diabetes.展开更多
Objective:The barks,leaves,and branches of Cinnamomum cassia have been historically used as a traditional Chinese medicine,spice,and food preservative,in which phenylpropanoids are responsible compounds.However phenyl...Objective:The barks,leaves,and branches of Cinnamomum cassia have been historically used as a traditional Chinese medicine,spice,and food preservative,in which phenylpropanoids are responsible compounds.However phenylpropanoid biosynthesis pathways are not clear in C.cassia.We elucidated the pathways by descriptive analyses of differentially expressed genes related to phenylpropanoid biosynthesis as well as to identify various phenylpropanoid metabolites.Methods:Chemical analysis,metabolome sequencing,and transcriptome sequencing were performed to investigate the molecular mechanisms underlying the difference of active components content in the barks,branches and leaves of C.cassia.Results:Metabolomic analysis revealed that small amounts of flavonoids,coumarine,and cinnamaldehyde accumulated in both leaves and branches.Transcriptome analysis showed that genes associated with phenylpropanoid and flavonoid biosynthesis were downregulated in the leaves and branches relative to the barks.The observed differences in essential oil content among the three tissues may be attributable to the differential expression of genes involved in the phenylpropanoid and flavonoid metabolic pathways.Conclusion:This study identified the key genes in the phenylpropanoid pathway controling the flavonoid,coumarine,and cinnamaldehyde contents in the barks,branches and leaves by comparing the transcriptome and metabolome.These findings may be valuable in assessing phenylpropanoid and flavonoid metabolites and identifying specific candidate genes that are related to the synthesis of phenylpropanoids and flavonoids in C.cassia.展开更多
基金supported by the key technology for the management of artificial multi-layers plantation(2006–2009)the interspecific nitrogen transfer behaviors and root interaction mechanism of Eucalyptus and Dalbergia odorifera T.Chen(31460196)the key technology for the management of Strified Mixed Stands of Pinus massoniana and Cinnamomum cassia(2014–2024)
文摘Thinning is an important activity employed in forest management. To date, studies have mainly focused on the effects of thinning on the growth of trees during the same thinning period. In this study, plantation Pinus massoniana Lamb. near maturity were thinned at varying intensities and an economically important species, Cinnamomum cassia Presl., was planted beneath the thinned canopy. The aim of the study was to explore the effects of the extent of thinning on the essential oil content and its components of C. cassia in different parts of the plant, as well as the economic feasibility of the P. massoniana–C.cassia management model. Thinning significantly reduced the oil yield in the bark and branches of C. cassia, but hardly impacted the oil yield from C. cassia leaves compared with pure C. cassia forest(CK). Among the different thinning treatments, both light(T.4) and extensive(T.1)thinning reduced the oil yield of C. cassia bark and new branches. The concentrations of the main aldehydes differed in different parts of the plant and were affected by the extent of thinning. The influence on cinnamaldehyde in the bark was minor, but was much greater in the branches and leaves. Both the oil yield and content of cinnamaldehyde showed that moderate(T.3) thinning was more favorable than other thinning models. These results not only provide a potentially promising model for the transformation of low–yield artificial pure forests of P. massoniana in the future, but also offer a reference for the management of artificial mixed stands.
文摘An improved solvent-free microwave extraction(ISFME) was used for the extraction of essential oil from dried Cinnamomum cassia Presl. Two kinds of solid microwave absorption media[carbonyl iron powder(CIP) and graphite powder(GP)] were used. When ISFME was applied, the heating rate was enhanced and the extraction time was obviously shorter than that consumed in conventional solvent-free microwave extraction(CSFME). Twenty-eight kinds of compounds in the essential oil were identified, and the total content fractions of the compounds obtained by CIP-ISFME, GP-ISFME, CSFME, and hydrodistillation(HD) were 96.65%, 96.06%, 97.22%, and 96.29%, respectively. The compounds in the essential oil obtained from Cinnamomum cassia Presl. by ISFME, CSFME, and HD were compared and the quantity of the essential oil was almost the same. The ISFME has been proved to be a feasible way to extract essential oil from dried samples, and there are several obvious advantages in ISFME over those of HD and CSFME, for example, shorter extraction time(30 min) and lower energy consumption.
基金The project supported by Brain Korea 21plus project(20141615)R&D Program for Forestry Technology provided by Korea Forest Service(S111011L040100)
文摘OBJECTIVE Cinnamomum cassia has been used in traditional medicine in East Asian countries to treatallergic disease.Previous studies have demonstrated that C.cassiainhibits the development of mite antigen-induced skin lesions in NC/Nga mice by suppressing the Thelper 2cell response.The objective of this study is to investigate whether C.cassia has an efficient inhibition on systemic anaphylaxis and contact hypersensitivity in mice.METHODS To induce systemic anaphylaxis,mice were injected intraperitoneally with compound 48/80.Mortality was monitored for 1h after the injection.Contact hypersensitivity reaction was induced by topical application of 2,4-dinitrofluorobenzene(DNFB)to the ears of mice.After DNFBchallenge,ear thickness was measured 0,24 and 48h.RESULTS We discovered that C.cassia significantly inhibited compound 48/80-induced anaphylaxis and DNFB-induced ear swelling.Compound 48/80-induced anaphylaxiswas completely inhibited at the dose of 60mg·kg-1 body weight.Ear swelling at 24 h after DNFB-challenge was significantly less than that in the control group(0.16±0.03 vs.0.32±0.03 mm,P<0.01),while C.cassia was administered at the dose of 200mg·kg-1.CONCLUSION These findings indicate that C.cassiasuppresses allergic reactions,thus has potential value for mitigation of atopic dermatitis.
文摘Objective:To dig out potential of Cinnamomum cassia Presl to be developed into health tonics in regulating blood glucose from effectiveness and marketing,we designed this research.Methods:We searched from PubChem,CNKI,Web of Science,associated official websites,and other available resources to obtain information about Cinnamomum cassia Presl in blood glucose regulation.Results:Both volatile and non-volatile components of Cinnamomum cassia Presl were revealed as material foundation in blood glucose regulation.In addition,not only the production and utilization of blood glucose would be conditioned by Cinnamomum cassia Presl,but also the risk factors to diabetes as well as complications could be interfered by Cinnamomum cassia Presl.China,America,Australia,Canada and other countries have developed Cinnamomum cassia Presl-associated products to maintain healthy blood glucose level.Conclusion:Cinnamomum cassia Presl is effective in blood glucose regulation,and it’s of great potential to further develop Cinnamomum cassia Presl health products in the prevention and treatment of diabetes.
基金The Guangdong Basic and Applied Basic Research Foundation(No.2019A1515111043)Basic Research Project of Luoding Cinnamon Industry Development(No.2018-082)+2 种基金Youth Innovative Talents Project by Educational Department of Guangdong Province(No.2019KQNCX057)Special Fund for Science and Technology Innovation Cultivation of Guangdong University Students(special fund for“climbing plan”)(No.51348227)the Scientific Research Project of the Traditional Chinese Medicine Bureau of Guangdong Province(No.20202104)supported this study.
文摘Objective:The barks,leaves,and branches of Cinnamomum cassia have been historically used as a traditional Chinese medicine,spice,and food preservative,in which phenylpropanoids are responsible compounds.However phenylpropanoid biosynthesis pathways are not clear in C.cassia.We elucidated the pathways by descriptive analyses of differentially expressed genes related to phenylpropanoid biosynthesis as well as to identify various phenylpropanoid metabolites.Methods:Chemical analysis,metabolome sequencing,and transcriptome sequencing were performed to investigate the molecular mechanisms underlying the difference of active components content in the barks,branches and leaves of C.cassia.Results:Metabolomic analysis revealed that small amounts of flavonoids,coumarine,and cinnamaldehyde accumulated in both leaves and branches.Transcriptome analysis showed that genes associated with phenylpropanoid and flavonoid biosynthesis were downregulated in the leaves and branches relative to the barks.The observed differences in essential oil content among the three tissues may be attributable to the differential expression of genes involved in the phenylpropanoid and flavonoid metabolic pathways.Conclusion:This study identified the key genes in the phenylpropanoid pathway controling the flavonoid,coumarine,and cinnamaldehyde contents in the barks,branches and leaves by comparing the transcriptome and metabolome.These findings may be valuable in assessing phenylpropanoid and flavonoid metabolites and identifying specific candidate genes that are related to the synthesis of phenylpropanoids and flavonoids in C.cassia.
