Trichomes function in plant defenses against biotic and abiotic stresses;examination of glabrous lines,which lack trichomes,has revealed key aspects of trichome development and function.Tests of allelism in 51 glabrou...Trichomes function in plant defenses against biotic and abiotic stresses;examination of glabrous lines,which lack trichomes,has revealed key aspects of trichome development and function.Tests of allelism in 51 glabrous rice(Oryza sativa)accessions collected worldwide identified OsSPL10 and OsWOX3B as regulators of trichome development in rice.Here,we report that OsSPL10 acts as a transcriptional regulator controlling trichome development.Haplotype and transient expression analyses revealed that variation in the approximately 700-bp OsSPL10 promoter region is the primary cause of the glabrous phenotype in the indica cultivar WD-17993.Disruption of OsSPL10 by genome editing decreased leaf trichome density and length in the NIL-HL6 background.Plants with genotype OsSPL10^(WD-17993)/HL6 generated by crossing WD-17993 with NIL-HL6 also had fewer trichomes in the glumes.HAIRY LEAF6(HL6)encodes another transcription factor that regulates trichome initiation and elongation,and OsSPL10 directly binds to the HL6 promoter to regulate its expression.Moreover,the transcript levels of auxin-related genes,such as OsYUCCA5 and OsPIN-FORMED1b,were altered in OsSPL10 overexpression and RNAi transgenic lines.Feeding tests using locusts(Locusta migratoria)demonstrated that non-glandular trichomes affect feeding by this herbivore.Our findings provide a molecular framework for trichome development and an ecological perspective on trichome functions.展开更多
目的:探讨SEMA3B基因在不同病理类型来源肺癌细胞株中的表达及意义。方法:采用实时定量逆转录聚合酶链反应(Real Time RT-PCR)和琼脂糖凝胶电泳方法,检测来源于不同病理类型肺癌细胞株中SEMA3B基因的表达水平。结果:在不同病理类型的细...目的:探讨SEMA3B基因在不同病理类型来源肺癌细胞株中的表达及意义。方法:采用实时定量逆转录聚合酶链反应(Real Time RT-PCR)和琼脂糖凝胶电泳方法,检测来源于不同病理类型肺癌细胞株中SEMA3B基因的表达水平。结果:在不同病理类型的细胞株中SEMA3B-mRNA均较正常肺癌组织显著低表达;在大细胞肺癌细胞株H 1 299、腺癌细胞株PC7、鳞癌细胞株LK2或LC/Sq1细胞中SEMA3B均表达缺失。结论:SEMA3B低表达或表达缺失可能是肺癌发生的机制之一,深入分析SEMA3B在肺癌细胞中与其它信号通路间的相互作用,将有利于我们阐明肺癌的发生。展开更多
基金The research was supported by grants from the National Science Foundation of China(31271689)the Ministry of Science and Technology of China(2016YFD0100101-09).
文摘Trichomes function in plant defenses against biotic and abiotic stresses;examination of glabrous lines,which lack trichomes,has revealed key aspects of trichome development and function.Tests of allelism in 51 glabrous rice(Oryza sativa)accessions collected worldwide identified OsSPL10 and OsWOX3B as regulators of trichome development in rice.Here,we report that OsSPL10 acts as a transcriptional regulator controlling trichome development.Haplotype and transient expression analyses revealed that variation in the approximately 700-bp OsSPL10 promoter region is the primary cause of the glabrous phenotype in the indica cultivar WD-17993.Disruption of OsSPL10 by genome editing decreased leaf trichome density and length in the NIL-HL6 background.Plants with genotype OsSPL10^(WD-17993)/HL6 generated by crossing WD-17993 with NIL-HL6 also had fewer trichomes in the glumes.HAIRY LEAF6(HL6)encodes another transcription factor that regulates trichome initiation and elongation,and OsSPL10 directly binds to the HL6 promoter to regulate its expression.Moreover,the transcript levels of auxin-related genes,such as OsYUCCA5 and OsPIN-FORMED1b,were altered in OsSPL10 overexpression and RNAi transgenic lines.Feeding tests using locusts(Locusta migratoria)demonstrated that non-glandular trichomes affect feeding by this herbivore.Our findings provide a molecular framework for trichome development and an ecological perspective on trichome functions.
文摘目的:探讨SEMA3B基因在不同病理类型来源肺癌细胞株中的表达及意义。方法:采用实时定量逆转录聚合酶链反应(Real Time RT-PCR)和琼脂糖凝胶电泳方法,检测来源于不同病理类型肺癌细胞株中SEMA3B基因的表达水平。结果:在不同病理类型的细胞株中SEMA3B-mRNA均较正常肺癌组织显著低表达;在大细胞肺癌细胞株H 1 299、腺癌细胞株PC7、鳞癌细胞株LK2或LC/Sq1细胞中SEMA3B均表达缺失。结论:SEMA3B低表达或表达缺失可能是肺癌发生的机制之一,深入分析SEMA3B在肺癌细胞中与其它信号通路间的相互作用,将有利于我们阐明肺癌的发生。
