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Related Concept Videos

RNA-seq03:21

RNA-seq

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
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Laser-Capture Microdissection RNA-Sequencing for Spatial and Temporal Tissue-Specific Gene Expression Analysis in Plants
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Transcriptome analysis in maritime pine using laser capture microdissection and 454 pyrosequencing.

Rafael A Cañas1, Javier Canales1, Josefa Gómez-Maldonado1

  • 1Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Instituto Andaluz de Biotecnología, Universidad de Málaga, Campus Universitario de Teatinos s/n, Málaga 29071, Spain.

Tree Physiology
|January 7, 2014
PubMed
Summary

Researchers developed a new protocol combining laser capture microdissection (LCM) and 454 pyrosequencing for conifer transcriptome analysis. This method enhances RNA amplification and sequencing, enabling detailed gene expression studies in specific plant tissues.

Keywords:
Pinus pinastercDNA amplificationconiferstrees

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Area of Science:

  • Plant Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • Conifer genomes are exceptionally large, posing challenges for genomic research.
  • Transcriptome characterization is crucial for understanding gene expression in conifers.
  • Laser capture microdissection (LCM) combined with next-generation sequencing offers a powerful approach for analyzing specific cell types.

Purpose of the Study:

  • To develop and validate a protocol for transcriptomic analysis of conifer tissues using LCM and 454 pyrosequencing.
  • To optimize RNA amplification for minute samples obtained via LCM.
  • To improve the efficiency and quality of transcriptome sequencing in conifers.

Main Methods:

  • Utilized laser capture microdissection (LCM) on non-fixed, flash-frozen conifer tissue samples.
  • Adapted the Conifer RNA Amplification (CRA+) protocol for cDNA synthesis and amplification from limited total RNA.
  • Performed 454 pyrosequencing on amplified cDNA to generate transcriptome data.

Main Results:

  • The CRA+ protocol provided adequate cDNA yield and quality for 454 pyrosequencing.
  • 454 sequencing runs yielded read lengths and quality metrics near optimal parameters.
  • The CRA+ protocol reduced non-specific amplifications and poly(A:T) tail issues, enhancing read length and number.

Conclusions:

  • The developed LCM and CRA+ protocol is effective for transcriptomic analysis in conifer tissues.
  • This method facilitates global gene expression analysis in specific plant tissues.
  • The protocol has potential applicability to other plant species for transcriptomic studies.