目的 研究不同 p H值对东北红豆杉和南方红豆杉愈伤组织生长和紫杉醇含量的影响。方法 采用不同p H值的 B5培养基培养两种红豆杉愈伤组织 ,测定生长率、PAL 活性和紫杉醇含量。结果 不同红豆杉愈伤组织所需最适 p H值不同 ,而有利于...目的 研究不同 p H值对东北红豆杉和南方红豆杉愈伤组织生长和紫杉醇含量的影响。方法 采用不同p H值的 B5培养基培养两种红豆杉愈伤组织 ,测定生长率、PAL 活性和紫杉醇含量。结果 不同红豆杉愈伤组织所需最适 p H值不同 ,而有利于愈伤组织生长的 p H值均不利于 PAL 活性的提高和紫杉醇的积累。即 :愈伤组织生长快时 ,PAL活性将下降 ,紫杉醇含量也减少。结论 p H值明显影响红豆杉愈伤组织的生长及次级代谢水平 。展开更多
As a critical enzyme in secondary metabolism of plant,Phenylanlanine ammonialyase(PAL) has significant meaning to its development and strong tolerance ability against hard.A full-length cDNA of PAL gene was isolated f...As a critical enzyme in secondary metabolism of plant,Phenylanlanine ammonialyase(PAL) has significant meaning to its development and strong tolerance ability against hard.A full-length cDNA of PAL gene was isolated from Phyllostachys edulis through RT-PCR and RACE methods,and named as PePAL1(GenBank accession number:FJ195650).PePAL1 is 2 436 bp,which contains an open reading frame encoding 701 amino acids.The results of amino acid sequence analysis showed that PePAL1 had high identities with other gramineous PAL in Oryza sativa,Zea mays,Saccharum officinarum,Bambusa ventricosa,Bambusa oldhamii and Triticum aestivum,especially with PAL from O.sativa up to 93.0%.Phylogenetic analysis showed that PePAL1 and LLB1 were on different branch sites.Tissue specific expression showed that PePAL1 expressed in leaf,sheath,stem and root,much higher in stem.展开更多
利用开放式空气CO2浓度升高（Free Air Carbon-dioxide Enrichment,FACE）平台,研究了低氮（LN）和常氮（NN）水平下,大气CO2浓度升高对冬小麦叶片酚酸类物质代谢的影响。结果表明,CO2浓度升高对小麦叶片水杨酸、对羟基苯甲酸、肉桂酸...利用开放式空气CO2浓度升高（Free Air Carbon-dioxide Enrichment,FACE）平台,研究了低氮（LN）和常氮（NN）水平下,大气CO2浓度升高对冬小麦叶片酚酸类物质代谢的影响。结果表明,CO2浓度升高对小麦叶片水杨酸、对羟基苯甲酸、肉桂酸、阿魏酸和香草酸含量的影响随供氮水平的不同而有所差异。低氮下小麦通过提高叶片苯丙氨酸解氨酶（PAL）活性（30.1%）而使其含量均显著增加,增幅分别达33.7%、119.6%、26.7%、39.9%和28.6%;而常氮下PAL活性和酚酸类含量变化均未达显著水平。可见,大气CO2浓度升高对冬小麦酚酸类物质代谢的影响受氮水平的调控,在未来CO2浓度升高条件下,选择适宜的施肥水平将显得更为重要。此外,总酚含量与水杨酸、对羟基苯甲酸、肉桂酸、阿魏酸和香草酸等含量变化趋势基本一致,且总酚含量变化的79.6%~151.4%是由这几种酚酸含量变化引起的,说明CO2浓度升高使水杨酸、对羟基苯甲酸、肉桂酸、阿魏酸和香草酸等含量增加是总酚含量增加的直接原因。低氮条件下大气CO2浓度升高将通过改变酚酸类物质代谢而间接影响小麦与伴生杂草的关系。展开更多
文摘目的 研究不同 p H值对东北红豆杉和南方红豆杉愈伤组织生长和紫杉醇含量的影响。方法 采用不同p H值的 B5培养基培养两种红豆杉愈伤组织 ,测定生长率、PAL 活性和紫杉醇含量。结果 不同红豆杉愈伤组织所需最适 p H值不同 ,而有利于愈伤组织生长的 p H值均不利于 PAL 活性的提高和紫杉醇的积累。即 :愈伤组织生长快时 ,PAL活性将下降 ,紫杉醇含量也减少。结论 p H值明显影响红豆杉愈伤组织的生长及次级代谢水平 。
文摘As a critical enzyme in secondary metabolism of plant,Phenylanlanine ammonialyase(PAL) has significant meaning to its development and strong tolerance ability against hard.A full-length cDNA of PAL gene was isolated from Phyllostachys edulis through RT-PCR and RACE methods,and named as PePAL1(GenBank accession number:FJ195650).PePAL1 is 2 436 bp,which contains an open reading frame encoding 701 amino acids.The results of amino acid sequence analysis showed that PePAL1 had high identities with other gramineous PAL in Oryza sativa,Zea mays,Saccharum officinarum,Bambusa ventricosa,Bambusa oldhamii and Triticum aestivum,especially with PAL from O.sativa up to 93.0%.Phylogenetic analysis showed that PePAL1 and LLB1 were on different branch sites.Tissue specific expression showed that PePAL1 expressed in leaf,sheath,stem and root,much higher in stem.
文摘利用开放式空气CO2浓度升高（Free Air Carbon-dioxide Enrichment,FACE）平台,研究了低氮（LN）和常氮（NN）水平下,大气CO2浓度升高对冬小麦叶片酚酸类物质代谢的影响。结果表明,CO2浓度升高对小麦叶片水杨酸、对羟基苯甲酸、肉桂酸、阿魏酸和香草酸含量的影响随供氮水平的不同而有所差异。低氮下小麦通过提高叶片苯丙氨酸解氨酶（PAL）活性（30.1%）而使其含量均显著增加,增幅分别达33.7%、119.6%、26.7%、39.9%和28.6%;而常氮下PAL活性和酚酸类含量变化均未达显著水平。可见,大气CO2浓度升高对冬小麦酚酸类物质代谢的影响受氮水平的调控,在未来CO2浓度升高条件下,选择适宜的施肥水平将显得更为重要。此外,总酚含量与水杨酸、对羟基苯甲酸、肉桂酸、阿魏酸和香草酸等含量变化趋势基本一致,且总酚含量变化的79.6%~151.4%是由这几种酚酸含量变化引起的,说明CO2浓度升高使水杨酸、对羟基苯甲酸、肉桂酸、阿魏酸和香草酸等含量增加是总酚含量增加的直接原因。低氮条件下大气CO2浓度升高将通过改变酚酸类物质代谢而间接影响小麦与伴生杂草的关系。
