为了进一步探索木葡聚糖内糖基转移/水解酶(XTH)在柿(Diospyros kaki L.)采后软化中的分子调控机制,应用实时荧光定量PCR技术检测常温下丙烯和1-甲基环丙烯(1-MCP)处理的‘富平尖柿’果实中XTH基因表达量的变化。结果显示,丙烯处理能够...为了进一步探索木葡聚糖内糖基转移/水解酶(XTH)在柿(Diospyros kaki L.)采后软化中的分子调控机制,应用实时荧光定量PCR技术检测常温下丙烯和1-甲基环丙烯(1-MCP)处理的‘富平尖柿’果实中XTH基因表达量的变化。结果显示,丙烯处理能够促进柿果实成熟软化,增加乙烯释放并使高峰提前到来,而1-MCP处理能够延缓果实软化,抑制乙烯释放。随着柿果实成熟软化推进,4个XTH基因呈现不同的表达方式,且丙烯处理促进了4个XTH基因的表达,而1-MCP处理则抑制它们的表达。其中,DkXTH1和DkXTH2在柿果实成熟软化过程中表达量较高,且二者表达高峰分别在果实成熟的初期和中期,说明DkXTH1和DkXTH2分别与采后柿果实初期和中后期的软化关系密切。结合乙烯释放量结果分析显示,柿果实XTH基因的表达受乙烯调控,对柿果实的成熟软化中具有一定的促进作用。展开更多
[Objective] This study aimed to investigate the functions and related mechanisms of xyloglucan Endotransglycosylase/hydrolases （XTHs） during the growth and development of dahlia. [Method] Using /3-actin as the refer...[Objective] This study aimed to investigate the functions and related mechanisms of xyloglucan Endotransglycosylase/hydrolases （XTHs） during the growth and development of dahlia. [Method] Using /3-actin as the reference gene, the rela- tive transcription levels of DpXTH1 and DpXTH2 genes in roots, stems, leaves and petals of dahlia were analyzed by real-time RT-PCR. [Result] The DpXTH1 and DpXTH2 were not expressed in the roots, but expressed abundantly in the petals of dahlia. There were little expressions in the stems and leaves of dahlia. [Conclusion] The DpXTH1 and DpXTH2 were petal-specific genes and closely related to the growth and development of petals in dahlia.展开更多
[Objective] This study aimed to investigate the structural character of xy- Ioglucan endotransglycosylase/hydrolase （XTH） gene in ethylene-insensitive feverfew. [Method] The total RNA was extracted from Chrysanthemu...[Objective] This study aimed to investigate the structural character of xy- Ioglucan endotransglycosylase/hydrolase （XTH） gene in ethylene-insensitive feverfew. [Method] The total RNA was extracted from Chrysanthemum rnorifolium petal using Trizol reagent, and the cDNA fragment of XTH gene was cloned by RT-PCR and T/A cloning. [Result] The sequencing result showed that the cloned cDNA sequence was 911 bp. It was predicted to encode a polypeptide of 293 amino acids and had seven active sites of XTH family, and then named as CmXTH （gene accession number HM752243）. In addition, The BLAST analysis showed that the deduced amino acid sequence of CmXTH showed high homology with other 19 chosen plant XTHs. Among of these, CmXTH shared closer genetic relationship with Gerbera jamesonii, Solanum lycopersicum, whereas had relatively distant relationship with Populus euparatica, Fragaria ananassa, Actinidia deliciosa, etc. [Conclusion] The cloned fragment was certainly the cDNA of XTH gene, which was associated with the petal growth and senescence in Chrysanthemum morifolium.展开更多
文摘为了进一步探索木葡聚糖内糖基转移/水解酶(XTH)在柿(Diospyros kaki L.)采后软化中的分子调控机制,应用实时荧光定量PCR技术检测常温下丙烯和1-甲基环丙烯(1-MCP)处理的‘富平尖柿’果实中XTH基因表达量的变化。结果显示,丙烯处理能够促进柿果实成熟软化,增加乙烯释放并使高峰提前到来,而1-MCP处理能够延缓果实软化,抑制乙烯释放。随着柿果实成熟软化推进,4个XTH基因呈现不同的表达方式,且丙烯处理促进了4个XTH基因的表达,而1-MCP处理则抑制它们的表达。其中,DkXTH1和DkXTH2在柿果实成熟软化过程中表达量较高,且二者表达高峰分别在果实成熟的初期和中期,说明DkXTH1和DkXTH2分别与采后柿果实初期和中后期的软化关系密切。结合乙烯释放量结果分析显示,柿果实XTH基因的表达受乙烯调控,对柿果实的成熟软化中具有一定的促进作用。
基金Supported by Applied Basic Research Project of Suzhou City(SYN201405)National College Students’Innovative Entrepreneurial Training Program(201410285049Z)~~
文摘[Objective] This study aimed to investigate the functions and related mechanisms of xyloglucan Endotransglycosylase/hydrolases （XTHs） during the growth and development of dahlia. [Method] Using /3-actin as the reference gene, the rela- tive transcription levels of DpXTH1 and DpXTH2 genes in roots, stems, leaves and petals of dahlia were analyzed by real-time RT-PCR. [Result] The DpXTH1 and DpXTH2 were not expressed in the roots, but expressed abundantly in the petals of dahlia. There were little expressions in the stems and leaves of dahlia. [Conclusion] The DpXTH1 and DpXTH2 were petal-specific genes and closely related to the growth and development of petals in dahlia.
基金Supported by the Applied Basic Research Program of Suzhou City(SYN201205)the University Innovation Research and Training Program(101028537)~~
文摘[Objective] This study aimed to investigate the structural character of xy- Ioglucan endotransglycosylase/hydrolase （XTH） gene in ethylene-insensitive feverfew. [Method] The total RNA was extracted from Chrysanthemum rnorifolium petal using Trizol reagent, and the cDNA fragment of XTH gene was cloned by RT-PCR and T/A cloning. [Result] The sequencing result showed that the cloned cDNA sequence was 911 bp. It was predicted to encode a polypeptide of 293 amino acids and had seven active sites of XTH family, and then named as CmXTH （gene accession number HM752243）. In addition, The BLAST analysis showed that the deduced amino acid sequence of CmXTH showed high homology with other 19 chosen plant XTHs. Among of these, CmXTH shared closer genetic relationship with Gerbera jamesonii, Solanum lycopersicum, whereas had relatively distant relationship with Populus euparatica, Fragaria ananassa, Actinidia deliciosa, etc. [Conclusion] The cloned fragment was certainly the cDNA of XTH gene, which was associated with the petal growth and senescence in Chrysanthemum morifolium.
