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[SANET-MG] gene expression in wheat with organic vrs inorganic fertilizer
The paper below shows that there are clear differences in gene
expression in wheat grown with organic vrs inorganic fertilizer. These
differences go well beyond the genes for nitrogen metabolism. It is
important to know how these gene expression differences effect
nutrition. My guess is that the differences are very significant.
Proceedings: Biological Sciences
ISSN: 0962-8452 (Paper) 1471-2954 (Online)
Issue: Volume 272, Number 1575 / September 22, 2005Pages: 1901 - 1908
DOI: 10.1098/rspb.2005.3161
URL: Linking Options
Markedly different gene expression in wheat grown with organic or
inorganic fertilizer
Chungui Lu A1 A2, Malcolm J. Hawkesford A1, Peter B. Barraclough A1,
Paul R. Poulton A1, Ian D. Wilson A2, Gary L. Barker A2, Keith J.
Edwards A2
A1 Rothamsted Research Harpenden AL5 2JQ, UK
A2 University of Bristol School of Biological Sciences Bristol BS8 1UG, UK
Abstract:
Nitrogen is the major determinant of crop yield and quality and the
precise management of nitrogen fertilizer is an important issue for
farmers and environmentalists. Despite this, little is known at the
level of gene expression about the response of field crops to different
amounts and forms of nitrogen fertilizer. Here we use expressed sequence
tag (EST)-based wheat microarrays in combination with the oldest
continuously running agricultural experiment in the world to show that
gene expression is significantly influenced by the amount and form of
nitrogenous fertilizer. In the Broadbalk winter wheat experiment at
Rothamsted in the United Kingdom and at three other diverse test sites,
we show that specific genes have surprisingly different expression
levels in the grain endosperm when nitrogen is supplied either in an
organic or an inorganic form. Many of the genes showing differential
expression are known to participate in nitrogen metabolism and storage
protein synthesis. However, others are of unknown function and therefore
represent new leads for future investigation. Our observations show that
specific gene expression is diagnostic for use of organic sources of
nitrogen fertilizer and may therefore have useful applications in
defining the differences between organically and conventionally grown wheat
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