We studied the molecular mechanism of the quality traits of wood formation in larch.We used the immature latewood cells of two Japanese larch(Larix kaempferi)clones with significant differences in density and in micro...We studied the molecular mechanism of the quality traits of wood formation in larch.We used the immature latewood cells of two Japanese larch(Larix kaempferi)clones with significant differences in density and in microfibrillar angle(MFA)as materials to analyze their gene expression profiles.A total of 1735 differentially expressed genes were detected in immature latewood cells of the two clones,among which,971 were up-regulated and 764 were down-regulated.Digital gene expression profiling analysis revealed that genes encoding transcription factor members NAC66 and R2R3-MYB4,microtubule-associated protein,actin-related protein,cell wall protein members,arabinogalactan protein,Fasciclin-like arabinogalactan protein and glycine-rich protein,and several cell-wall-synthesis genes affected wood density and MFA by regulating latewood formation at transcriptional level.Our study results represent a basis for selection of quality traits and genetic improvement of larch wood.展开更多
为筛选太行鸡脾脏组织中绵羊红细胞(sheep red blood cell,SRBC)免疫应答的关键基因和信号通路,本研究采用高通量测序技术,构建了太行鸡SRBC免疫组和对照组脾脏组织的数字基因表达谱,对差异表达的基因进行筛选与注释、GO分析和通路的功...为筛选太行鸡脾脏组织中绵羊红细胞(sheep red blood cell,SRBC)免疫应答的关键基因和信号通路,本研究采用高通量测序技术,构建了太行鸡SRBC免疫组和对照组脾脏组织的数字基因表达谱,对差异表达的基因进行筛选与注释、GO分析和通路的功能显著性富集以及差异基因编码蛋白的互作网络分析。结果表明:太行鸡在免疫6 d后的SRBC抗体滴度平均值为7.653;与对照组相比,差异倍数在2倍以上的共有1 108个基因,其中496个上调表达,612个下调表达,412个上调基因只在免疫组表达,537个下调基因仅在对照组表达;上调基因主要涉及T细胞激活、淋巴细胞增殖和单核细胞增殖等生物学过程,下调基因主要参与免疫效应、防御效应、炎性效应、先天性免疫效应生物学过程;在分子注释系统数据库中注释到的免疫相关的显著调控通路有12条,包括抗原的加工递呈、Toll样受体信号通路、沙门氏菌感染、HTLV-Ⅰ感染和单纯疱疹病毒感染等;56个差异基因编码的蛋白产物存在相互作用,其中16个基因位于网络中心节点,部分差异基因与SRBC相关QTL重叠。初步认为抗原加工与递呈的MHCⅡ类分子途径、T细胞激活等调控通路及RAG2、FOS、MHC B-LBⅢ、HSP90AA1、CXCR4和HSPA8等基因可能是参与调控太行鸡SRBC免疫应答的重要信号通路和基因,但其功能和影响还有待于深入研究。展开更多
基金supported by the Special Fund for Forest Scientific Research in the Public Welfare(201504104)the Fundamental Research Funds for the Central Non-profit Research Institution of CAF(CAFYBB2017ZA001)
文摘We studied the molecular mechanism of the quality traits of wood formation in larch.We used the immature latewood cells of two Japanese larch(Larix kaempferi)clones with significant differences in density and in microfibrillar angle(MFA)as materials to analyze their gene expression profiles.A total of 1735 differentially expressed genes were detected in immature latewood cells of the two clones,among which,971 were up-regulated and 764 were down-regulated.Digital gene expression profiling analysis revealed that genes encoding transcription factor members NAC66 and R2R3-MYB4,microtubule-associated protein,actin-related protein,cell wall protein members,arabinogalactan protein,Fasciclin-like arabinogalactan protein and glycine-rich protein,and several cell-wall-synthesis genes affected wood density and MFA by regulating latewood formation at transcriptional level.Our study results represent a basis for selection of quality traits and genetic improvement of larch wood.
