Methodology of protistan discovery: from rRNA detection to quality scanning electron microscope images.

Abstract:

:Each year, thousands of new protistan 18S rRNA sequences are detected in environmental samples. Many of these sequences are molecular signatures of new protistan species, classes, and/or kingdoms that have never been seen before. The main goal of this study was to enable visualization of these novel organisms and to conduct quality ultrastructural examination. We achieved this goal by modifying standard procedures for cell fixation, fluorescence in situ hybridization, and scanning electron microscopy (SEM) and by making these methodologies work in concert. As a result, the same individual cell can now be detected by 18S rRNA-targeted fluorochrome-labeled probes and then viewed by SEM to reveal its diagnostic morphological characteristics. The method was successfully tested on a wide range of protists (alveolates, stramenopiles, kinetoplastids, and cryptomonads). The new methodology thus opens a way for fine microscopy studies of many organisms previously known exclusively by their 18S rRNA sequences.

journal_name

Appl Environ Microbiol

authors

Stoeck T,Fowle WH,Epstein SS

doi

10.1128/aem.69.11.6856-6863.2003

keywords:

subject

Has Abstract

pub_date

2003-11-01 00:00:00

pages

6856-63

issue

11

eissn

0099-2240

issn

1098-5336

journal_volume

69

pub_type

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