Universität zu Köln

Kivivirta, Kimmo, Herbert, Denise, Lange, Matthias, Beuerlein, Knut, Altmueller, Janine and Becker, Annette ORCID: 0000-0002-3229-2162 (2019). A protocol for laser microdissection (LMD) followed by transcriptome analysis of plant reproductive tissue in phylogenetically distant. Plant Methods, 15 (1). LONDON: BMC. ISSN 1746-4811

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Abstract

Background: Plant development is controlled by the action of many, often connected gene regulatory networks. Differential gene expression controlled by internal and external cues is a major driver of growth and time specific differentiation in plants. Transcriptome analysis is the state-of-the-art method to detect spatio-temporal changes in gene expression during development. Monitoring changes in gene expression at early stages or in small plant organs and tissues requires an accurate technique of tissue isolation, which subsequently results in RNA of sufficient quality and quantity. Laser-microdissection enables such accurate dissection and collection of desired tissue from sectioned material at a microscopic level for RNA extraction and subsequent downstream analyses, such as transcriptome, proteome, genome or miRNA. Results: A protocol for laser-microdissection, RNA extraction and RNA-seq was optimized and verified for three distant angiosperm species: Arabidopsis thaliana (Brassicaceae), Oryza sativa (Poaceae) and Eschscholzia californica (Papaveraceae). Previously published protocols were improved in processing speed by reducing the vacuum intensity and incubation time during tissue fixation and incubation time and cryoprotection and by applying adhesive tape. The sample preparation and sectioning of complex and heterogenous flowers produced adequate histological quality and subsequent RNA extraction from micro-dissected gynoecia reliably generated samples of sufficient quality and quantity on all species for RNA-seq. Expression analysis of growth stage specific A. thaliana and O. sativa transcriptomes showed distinct patterns of expression of chromatin remodelers on different time points of gynoecium morphogenesis from the initiation of development to post-meiotic stages. Conclusion: Here we describe a protocol for plant tissue preparation, cryoprotection, cryo-sectioning, laser microdissection and RNA sample preparation for Illumina sequencing of complex plant organs from three phyletically distant plant species. We are confident that this approach is widely applicable to other plant species to enable transcriptome analysis with high spatial resolution in non-model plant species. The protocol is rapid, produces high quality sections of complex organs and results in RNA of adequate quality well suited for RNA-seq approaches. We provide detailed description of each stage of sample preparation with the quality and quantity measurements as well as an analysis of generated transcriptomes.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kivivirta, Kimmo UNSPECIFIED UNSPECIFIED UNSPECIFIED Herbert, Denise UNSPECIFIED UNSPECIFIED UNSPECIFIED Lange, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED Beuerlein, Knut UNSPECIFIED UNSPECIFIED UNSPECIFIED Altmueller, Janine UNSPECIFIED UNSPECIFIED UNSPECIFIED Becker, Annette UNSPECIFIED orcid.org/0000-0002-3229-2162 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-124303
DOI:	10.1186/s13007-019-0536-3
Journal or Publication Title:	Plant Methods
Volume:	15
Number:	1
Date:	2019
Publisher:	BMC
Place of Publication:	LONDON
ISSN:	1746-4811
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DNA METHYLATION; RNA; METHYLTRANSFERASES; CELLS; DDM1; DRM Multiple languages Biochemical Research Methods; Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12430