To study the main aroma components of Phalaenopsis orchid and their relationship with colors,10 fragrant cultivars with different colors,like pink,rose,yellow,and purple,were used as samples in this experiment.Headspa...To study the main aroma components of Phalaenopsis orchid and their relationship with colors,10 fragrant cultivars with different colors,like pink,rose,yellow,and purple,were used as samples in this experiment.Headspace-gas chromatography-mass spectrometry was used to determine the main components of floral fragrance and analyze the correlation between floral color and fragrance.The results showed that the main aroma components of the 10 fragrant cultivars of Phalaenopsis were alcohols,alkenes,esters,and benzene ring compounds,and the main aroma components of different cultivars were diverse.The main aroma components of yellow fragrant flowers were esters,alcohols,and alkenes.The purple and pink series were alcohols and phenyl rings.There was a certain correlation between flower color and floral fragrance.There was a significant positive correlation between esters and flower color C*value,and a significant negative correlation between alkenes and flower color h value.There was a significant negative correlation between alcohol and flower color C*value,and a significant positive correlation between alcohol and L*value.The content of benzene compounds was negatively correlated with L*and positively correlated with h value.This may be related to the synthesizing of anthocyanins and benzene ring compounds through the phenylpropanoid metabolic pathway.In this paper,the correlation between Phalaenopsis floral color and fragrance was studied,and the synthetic pathway of floral color and fragrance components was analyzed.The proposed method and research data can provide a theoretical basis for floral color breeding and fragrance synthesis.展开更多
减阻技术对水下航行器的工作效率和能耗具有重要影响,近年来围绕航行器表面结构减阻的相关研究成为热点,但仍缺乏对该领域现状的系统性梳理。通过文献计量方法对WOS(Web of Science)和CNKI(中国知网)数据库中文献的关键词、作者和机构...减阻技术对水下航行器的工作效率和能耗具有重要影响,近年来围绕航行器表面结构减阻的相关研究成为热点,但仍缺乏对该领域现状的系统性梳理。通过文献计量方法对WOS(Web of Science)和CNKI(中国知网)数据库中文献的关键词、作者和机构进行可视化分析,总结出表面仿生造型设计、表面沟槽结构设计和表面涂层材料设计3个热点研究方向;重点对表面造型设计中的仿生设计、仿真试验、结构参数优化方法、表面结构设计中的微观结构设计和多功能协调设计方法,以及表面涂层材料设计中的生物模拟、智能材料和表面改性方法进行分析,指出表面结构减阻技术应用于水下航行器的优势及未来研究聚焦领域,为水下航行器减阻方式的拓展和系统设计提供参考。展开更多
Rose(Rosa hybrida)is one of most famous ornamental plants in the world,and its commodity value largely depends on its flower color.However,the regulatory mechanism underlying rose flower color is still unclear.In this...Rose(Rosa hybrida)is one of most famous ornamental plants in the world,and its commodity value largely depends on its flower color.However,the regulatory mechanism underlying rose flower color is still unclear.In this study,we found that a key R2R3-MYB transcription factor,RcMYB1,plays a central role in rose anthocyanin biosynthesis.Overexpression of RcMYB1 significantly promoted anthocyanin accumulation in both white rose petals and tobacco leaves.In 35S:RcMYB1 transgenic lines,a significant accumulation of anthocyanins occurred in leaves and petioles.We further identified two MBW complexes(RcMYB1-RcBHLH42-RcTTG1;RcMYB1-RcEGL1-RcTTG1)associated with anthocyanin accumulation.Yeast one-hybrid and luciferase assays showed that RcMYB1 could active its own gene promoter and those of other EBGs(early anthocyanin biosynthesis genes)and LBGs(late anthocyanin biosynthesis genes).In addition,both of the MBW complexes enhanced the transcriptional activity of RcMYB1 and LBGs.Interestingly,our results also indicate that RcMYB1 is involved in the metabolic regulation of carotenoids and volatile aroma.In summary,we found that RcMYB1 widely participates in the transcriptional regulation of ABGs(anthocyanin biosynthesis genes),indicative of its central role in the regulation of anthocyanin accumulation in rose.Our results provide a theoretical basis for the further improvement of the flower color trait in rose by breeding or genetic modification.展开更多
基金supported by the Shandong Province Key Research and Development Plan Project(ID Numbers 2024LZGC026 and 2021LZGC019)Shanghai Science and Technology Agriculture Project(ID Number 2020-02-08-00-12-F01463).
摘要To study the main aroma components of Phalaenopsis orchid and their relationship with colors,10 fragrant cultivars with different colors,like pink,rose,yellow,and purple,were used as samples in this experiment.Headspace-gas chromatography-mass spectrometry was used to determine the main components of floral fragrance and analyze the correlation between floral color and fragrance.The results showed that the main aroma components of the 10 fragrant cultivars of Phalaenopsis were alcohols,alkenes,esters,and benzene ring compounds,and the main aroma components of different cultivars were diverse.The main aroma components of yellow fragrant flowers were esters,alcohols,and alkenes.The purple and pink series were alcohols and phenyl rings.There was a certain correlation between flower color and floral fragrance.There was a significant positive correlation between esters and flower color C*value,and a significant negative correlation between alkenes and flower color h value.There was a significant negative correlation between alcohol and flower color C*value,and a significant positive correlation between alcohol and L*value.The content of benzene compounds was negatively correlated with L*and positively correlated with h value.This may be related to the synthesizing of anthocyanins and benzene ring compounds through the phenylpropanoid metabolic pathway.In this paper,the correlation between Phalaenopsis floral color and fragrance was studied,and the synthetic pathway of floral color and fragrance components was analyzed.The proposed method and research data can provide a theoretical basis for floral color breeding and fragrance synthesis.
摘要减阻技术对水下航行器的工作效率和能耗具有重要影响,近年来围绕航行器表面结构减阻的相关研究成为热点,但仍缺乏对该领域现状的系统性梳理。通过文献计量方法对WOS(Web of Science)和CNKI(中国知网)数据库中文献的关键词、作者和机构进行可视化分析,总结出表面仿生造型设计、表面沟槽结构设计和表面涂层材料设计3个热点研究方向;重点对表面造型设计中的仿生设计、仿真试验、结构参数优化方法、表面结构设计中的微观结构设计和多功能协调设计方法,以及表面涂层材料设计中的生物模拟、智能材料和表面改性方法进行分析,指出表面结构减阻技术应用于水下航行器的优势及未来研究聚焦领域,为水下航行器减阻方式的拓展和系统设计提供参考。
基金This work was supported by Shanghai Special Project of Capacity Construction for Local Colleges and Universities,No.20070502500Shanghai Science and Technology Agriculture Program,No.2022-02-08-00-12-F01146+1 种基金Science and Technology Commission of Shanghai Municipality,No.18DZ2260500Shanghai Plant Germplasm Resources Engineering Research Center,17DZ2252700.
摘要Rose(Rosa hybrida)is one of most famous ornamental plants in the world,and its commodity value largely depends on its flower color.However,the regulatory mechanism underlying rose flower color is still unclear.In this study,we found that a key R2R3-MYB transcription factor,RcMYB1,plays a central role in rose anthocyanin biosynthesis.Overexpression of RcMYB1 significantly promoted anthocyanin accumulation in both white rose petals and tobacco leaves.In 35S:RcMYB1 transgenic lines,a significant accumulation of anthocyanins occurred in leaves and petioles.We further identified two MBW complexes(RcMYB1-RcBHLH42-RcTTG1;RcMYB1-RcEGL1-RcTTG1)associated with anthocyanin accumulation.Yeast one-hybrid and luciferase assays showed that RcMYB1 could active its own gene promoter and those of other EBGs(early anthocyanin biosynthesis genes)and LBGs(late anthocyanin biosynthesis genes).In addition,both of the MBW complexes enhanced the transcriptional activity of RcMYB1 and LBGs.Interestingly,our results also indicate that RcMYB1 is involved in the metabolic regulation of carotenoids and volatile aroma.In summary,we found that RcMYB1 widely participates in the transcriptional regulation of ABGs(anthocyanin biosynthesis genes),indicative of its central role in the regulation of anthocyanin accumulation in rose.Our results provide a theoretical basis for the further improvement of the flower color trait in rose by breeding or genetic modification.