Expression of DNA sequences in a preferred manner in the roots of a plant
is often desirable. For instance improved resistance to soil-borne
pathogens may be attained by expression of a pathogen resistance gene in
a part of the plant such as the root that may be the site of infection.
It is therefore desirable to develop tissue-preferred promoters that are
capable of directing the expression in a preferred manner in plant roots,
of another DNA sequence that is operably linked to the promoter sequence.
Further, it is desirable to have access to multiple promoters with
similar expression patterns since these may differ with respect to their
degree of successful applicability in different plant species where such
expression may be desired. Here we describe the isolation and analysis of
a DNA sequence from the upstream regulatory region of the At1g73160 gene
of Arabidopsis. The said DNA sequence acts as a root-preferred promoter
by conferring root-preferred expression of the GUS reporter gene cloned
immediately downstream. Composition of the invention comprises a novel
DNA sequence for a root-preferred promoter and the method comprises
incorporation into the genome of a plant or plant cell, a DNA sequence
operably linked to the said root-preferred promoter.