我校科研组揭示了剪接变体调控林木次生生长新机制【HTH官网】

发布时间：2024-12-18  人浏览

本文摘要：@font-face{ font-family:"Times New Roman";} @font-face{ font-family:"宋体";} @font-face{ font-family:"Wingdings";} @font-face{ font-family:"Calibri";} @font-face{ font-family:"仿宋_GB2312";} p.MsoNormal{ mso-style-name:正文; mso-style-parent:""; margin:0pt; margin-bottom:.0001pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; font-family:Calibri; font-size:10.5000pt; mso-font-kerning:1.0000pt;} span.10{ font-family:'Times New Roman';} span.15{ font-family:'Times New Roman'; font-size:9.0000pt;} span.16{ font-family:'Times New Roman'; font-size:9.0000pt;} p.MsoHeader{ mso-style-name:页眉; mso-style-noshow:yes; margin:0pt; margin-bottom:.0001pt; border-bottom:1.0000pt solid #000; mso-border-bottom-alt:0.7500pt solid #000; padding:0pt 0pt 1pt 0pt ; vsb_temp-mode:char; mso-pagination:none; text-align:center; font-family:'Times New Roman'; font-size:9.0000pt;} p.MsoFooter{ mso-style-name:页脚; mso-style-noshow:yes; margin:0pt; margin-bottom:.0001pt; vsb_temp-mode:char; mso-pagination:none; text-align:left; font-family:'Times New Roman'; font-size:9.0000pt;} p.p{ mso-style-name:"普通\(网站\)"; margin:0pt; margin-bottom:.0001pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; font-family:Calibri; font-size:12.0000pt; mso-font-kerning:1.0000pt;} span.msoIns{ mso-style-type:export-only; mso-style-name:""; text-decoration:underline; text-underline:single; color:blue;} span.msoDel{ mso-style-type:export-only; mso-style-name:""; text-decoration:line-through; color:red;} table.MsoNormalTable{ mso-style-name:普通表格; mso-style-parent:""; mso-style-noshow:yes; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-padding-alt:0.0000pt 5.4000pt 0.0000pt 5.4000pt; mso-para-margin:0pt; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-family:'Times New Roman'; font-size:10.0000pt; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} @page{mso-page-border-surround-header:no; mso-page-border-surround-footer:no;}@page Section0{ margin-top:49.6500pt; margin-bottom:28.4000pt; margin-left:54.0000pt; margin-right:54.0000pt; size:595.3000pt 841.9000pt; vsb_temp:15.6000pt;} div.Section0{page:Section0;} 近期，我校林学院林木遗传选育国家重点实验室姜立泉教授团队在国际顶尖学术期刊——美国国家科学院院刊（ProceedingsoftheNationalAcademyofSciencesoftheUnitedStatesofAmerica，PNAS，综合类期刊1区，IF=10.414）公开发表为题“Reciprocalcross-regulationofVNDandSNDmultigeneTFfamilies forwoodformationinPopulustrichocarpa”的研究论文。

@font-face{ font-family:"Times New Roman";} @font-face{ font-family:"宋体";} @font-face{ font-family:"Wingdings";} @font-face{ font-family:"Calibri";} @font-face{ font-family:"仿宋_GB2312";} p.MsoNormal{ mso-style-name:正文; mso-style-parent:""; margin:0pt; margin-bottom:.0001pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; font-family:Calibri; font-size:10.5000pt; mso-font-kerning:1.0000pt;} span.10{ font-family:'Times New Roman';} span.15{ font-family:'Times New Roman'; font-size:9.0000pt;} span.16{ font-family:'Times New Roman'; font-size:9.0000pt;} p.MsoHeader{ mso-style-name:页眉; mso-style-noshow:yes; margin:0pt; margin-bottom:.0001pt; border-bottom:1.0000pt solid #000; mso-border-bottom-alt:0.7500pt solid #000; padding:0pt 0pt 1pt 0pt ; vsb_temp-mode:char; mso-pagination:none; text-align:center; font-family:'Times New Roman'; font-size:9.0000pt;} p.MsoFooter{ mso-style-name:页脚; mso-style-noshow:yes; margin:0pt; margin-bottom:.0001pt; vsb_temp-mode:char; mso-pagination:none; text-align:left; font-family:'Times New Roman'; font-size:9.0000pt;} p.p{ mso-style-name:"普通\(网站\)"; margin:0pt; margin-bottom:.0001pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; font-family:Calibri; font-size:12.0000pt; mso-font-kerning:1.0000pt;} span.msoIns{ mso-style-type:export-only; mso-style-name:""; text-decoration:underline; text-underline:single; color:blue;} span.msoDel{ mso-style-type:export-only; mso-style-name:""; text-decoration:line-through; color:red;} table.MsoNormalTable{ mso-style-name:普通表格; mso-style-parent:""; mso-style-noshow:yes; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-padding-alt:0.0000pt 5.4000pt 0.0000pt 5.4000pt; mso-para-margin:0pt; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-family:'Times New Roman'; font-size:10.0000pt; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} @page{mso-page-border-surround-header:no; mso-page-border-surround-footer:no;}@page Section0{ margin-top:49.6500pt; margin-bottom:28.4000pt; margin-left:54.0000pt; margin-right:54.0000pt; size:595.3000pt 841.9000pt; vsb_temp:15.6000pt;} div.Section0{page:Section0;} 近期，我校林学院林木遗传选育国家重点实验室姜立泉教授团队在国际顶尖学术期刊——美国国家科学院院刊（ProceedingsoftheNationalAcademyofSciencesoftheUnitedStatesofAmerica，PNAS，综合类期刊1区，IF=10.414）公开发表为题“Reciprocalcross-regulationofVNDandSNDmultigeneTFfamilies forwoodformationinPopulustrichocarpa”的研究论文。论文的第一作者为团队的林盈仲副教授，其他参予作者还包括了重点实验室的7位成员。该研究找到木本植物中掌控次生细胞壁发育的主要调控者PtrVND6-C1和PtrSND1-A2，分别不存在一个剪辑变体PtrVND6-C1IR和PtrSND1-A2IR，这两个剪辑变体可以作为胜调控者交互调控PtrSND1和PtrVND6家族成员的传达。

这一找到阐述了剪辑变体参予调控木材构成的新机制，为林木的遗传改进奠下了近期的理论基础。木材是木本植物展开次生生长的产物，是最重要的可再生资源，可以用来工业生产和能源生产量。次生细胞壁是木材的最重要组成部分，一系列最重要的mRNA因子参予调控次生细胞壁的构成，有数研究报导NACmRNA因子家族成员Vascular-RelatedNACDomain(VND)和SecondaryWall-AssociatedNACDomain(SND)是参予调控次生细胞壁的构成的关键mRNA因子。

本团队2012年在PNAS（http://www.pnas.org/content/109/36/14699.short）报导了PtrSND1-A2的剪辑变体PtrSND1-A2IR作为一个胜调控者诱导了除了PtrSND1-A2自身以外的所有PtrSND1家族成员的传达，因此我们猜测有可能不存在一个不得而知的机制去调控PtrSND1-A2的传达。本研究对2012年报导展开了先前研究，找到NACmRNA因子家族成员PtrVND6-C1不存在一个功能互为类似于的剪辑变体PtrVND6-C1IR，PtrVND6-C1IR可以诱导PtrVND6家族所有成员的传达除了PtrVND6-C1。

此外，我们还找到PtrVND6-C1IR和PtrSND1-A2IR同时可以作为胜调控者交互调控PtrSND1和PtrVND6成员的传达，即PtrVND6-C1IR在诱导PtrVND6家族成员的同时还可以诱导还包括PtrSND1-A2在内的所有PtrSND1成员；某种程度PtrSND1-A2IR可以诱导还包括PtrVND6-C1在内的所有VND成员。以上试验结果表明在林木发育的过程中，不存在PtrVND6和PtrSND1家族成员的剪辑变体交互调控PtrSND1和PtrVND6家族成员传达的新机制。这种新机制有可能作为一种广泛的现象不存在于NACmRNA因子家族以及其他mRNA因子家族，同时阐述了剪辑变体潜在的新功能。

本研究获得了国家大自然基金委大自然基金重点项目的反对。

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