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Plant Physiol, August 2000, Vol. 123, pp. 1203-1212
High Throughput Cellular Localization of Specific Plant mRNAs
by Liquid-Phase in Situ Reverse Transcription-Polymerase Chain Reaction
of Tissue Sections1
Hinanit
Koltai and
David McKenzie
Bird*
Department of Plant Pathology, North Carolina State University,
Raleigh, North Carolina 27695
Advances in high throughput DNA sequencing and bioinformatic gene
discovery far outpace our ability to analyze gene function, necessitating development of more efficient means to examine expression at the cellular level. Here we present a polymerase chain
reaction-based method to detect mRNA species in situ in which
essentially all of the steps are carried out in liquid phase in a
96-well microtiter tray and only the final signal detection is
performed on a microscope slide. We demonstrate the sensitivity of the
method by the cellular localization of mRNA for the Tkn2
transcription factor in a wide variety of plant tissues, and its
selectivity in discriminating a single gene family member by the in
situ localization of rbcs3 transcripts. Furthermore, we
demonstrate the utility of the in-well in situ method in detecting
FDL and IFL1 transcripts in Arabidopsis sections, thus establishing the method as a tool to determine spatial
expression pattern of sequences obtained from genomic sequencing
projects. Being amenable to robotic processing, in-well in situ reverse
transcription-polymerase chain reaction permits a great enhancement in
the number of tissue samples that can be processed. Consequently, this
method may become a powerful tool for functional genomics studies,
permitting the cellular site of transcription of large numbers of
sequences obtained from databases to be rapidly established.
1
This work was supported by a U.S.
Department of Agriculture-National Research Initiative award (to
D.M.B.). H.K. is supported in part by a research grant award (no.
FI-270-98) from the United States-Israel Binational Agricultural
Research and Development Fund, by a Fulbright Fellowship, and by the
U.S. Council for International Exchange of Scholars.
*
Corresponding author; e-mail david_bird{at}ncsu.edu; fax
919-515-9500.
© 2000 American Society of Plant Physiologists
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