Shan Ci Gu(山慈菇Pseudobulbus Cremastrae seu Pleiones),a rare and precious traditional Chinese medicine,has attracted attention for the treatment of various cancers and bacterial infections.According to the Pharmacopo...Shan Ci Gu(山慈菇Pseudobulbus Cremastrae seu Pleiones),a rare and precious traditional Chinese medicine,has attracted attention for the treatment of various cancers and bacterial infections.According to the Pharmacopoeia of the People's Republic of China,Pseudobulbus Cremastrae seu Pleionesis sourced from the pseudobulbs of three plants in the Orchidaceae family:Cremastra appendiculata(D.Don)Makino,Pleione bulbocodioides(Franch.)Rolfe,and Pleione yunnanensis Rolfe.Extracts from Pseudobulbus Cremastrae seu Pleiones are used for the treatment of tumors,burns,and frostbite.The aims of this review are to provide information on the historical and herbological origins of Pseudobulbus Cremastrae seu Pleiones,to summarize research conducted on its phytochemical and biological activities over the last twenty years,and to detail planting efforts.展开更多
Our previous studies have revealed that the Th CAP gene plays a vital role in transgenic Populus(P.davidiana 9 P.bolleana) in response to cold stress.However,the regulatory mechanism of Th CAP gene expression has been...Our previous studies have revealed that the Th CAP gene plays a vital role in transgenic Populus(P.davidiana 9 P.bolleana) in response to cold stress.However,the regulatory mechanism of Th CAP gene expression has been unclear.In this study,the 50 flanking region of the Th CAP promoter(PTh CAP) was cloned using a genomewalking method.By analyzing cis-acting regulatory elements of PTh CAP,a DRE motif and MYC and MYB elements were found to be located in the promoter.To identify the regulatory elements that control the expression of the Th CAP gene promoter,a series of deletion derivatives ofPTh CAP,P1–P5,from the translation start code(-1538,-1190,-900,-718 and-375 bp),were fused to the GUS reporter gene,and then each deletion was stably introduced into Arabidopsis thaliana plants.Deletion analysis of the promoter suggested that only the P2 fragment had strong GUS expression in leaves and roots of A.thaliana exposed to low temperature stress.These results suggest that this290-bp region(-1190 to-900 bp),as an important part in PTh CAP,was associated with cold tolerance of A.thaliana.Our results provide evidence for the regulatory mechanism of Th CAP gene involved in the response to cold stress,and that the gene is promising candidate gene for genetic improvement of crops.展开更多
基金This project was supported by the Special Fund of the Guangxi Zhuang Autonomous Region for Specially-invited Experts of China(No.2019B24).
文摘Shan Ci Gu(山慈菇Pseudobulbus Cremastrae seu Pleiones),a rare and precious traditional Chinese medicine,has attracted attention for the treatment of various cancers and bacterial infections.According to the Pharmacopoeia of the People's Republic of China,Pseudobulbus Cremastrae seu Pleionesis sourced from the pseudobulbs of three plants in the Orchidaceae family:Cremastra appendiculata(D.Don)Makino,Pleione bulbocodioides(Franch.)Rolfe,and Pleione yunnanensis Rolfe.Extracts from Pseudobulbus Cremastrae seu Pleiones are used for the treatment of tumors,burns,and frostbite.The aims of this review are to provide information on the historical and herbological origins of Pseudobulbus Cremastrae seu Pleiones,to summarize research conducted on its phytochemical and biological activities over the last twenty years,and to detail planting efforts.
基金supported by the State Key Laboratory of Tree Genetics and Breeding(Northeast Forestry University)(201102)Natural Science Foundation of Heilongjiang Province(QC2012C057)+2 种基金China Postdoctoral Science Foundation(2013M531005)Foundation for the Postdoctoral of Heilongjiang Province(LBH-Z12007)National Natural Science Foundation of China(31200510)
文摘Our previous studies have revealed that the Th CAP gene plays a vital role in transgenic Populus(P.davidiana 9 P.bolleana) in response to cold stress.However,the regulatory mechanism of Th CAP gene expression has been unclear.In this study,the 50 flanking region of the Th CAP promoter(PTh CAP) was cloned using a genomewalking method.By analyzing cis-acting regulatory elements of PTh CAP,a DRE motif and MYC and MYB elements were found to be located in the promoter.To identify the regulatory elements that control the expression of the Th CAP gene promoter,a series of deletion derivatives ofPTh CAP,P1–P5,from the translation start code(-1538,-1190,-900,-718 and-375 bp),were fused to the GUS reporter gene,and then each deletion was stably introduced into Arabidopsis thaliana plants.Deletion analysis of the promoter suggested that only the P2 fragment had strong GUS expression in leaves and roots of A.thaliana exposed to low temperature stress.These results suggest that this290-bp region(-1190 to-900 bp),as an important part in PTh CAP,was associated with cold tolerance of A.thaliana.Our results provide evidence for the regulatory mechanism of Th CAP gene involved in the response to cold stress,and that the gene is promising candidate gene for genetic improvement of crops.
