Freezing tolerance proteins Wcs19 and Wcor410 from gramineae
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United States of America Patent
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Mar 24, 1998
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Aug 16, 1993
filing date -
Aug 16, 1993
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Expired
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Abstract
The present invention relates to three novel genes which have been isolated from cold-tolerant wheat species and which are induced by low temperature. The first gene, Wcs19, is preferentially expressed in green leaf tissues of tolerant gramineae species and requires both light and low temperature for maximal induction. The second gene, Wcs120, is induced only by low temperature. Different from the protein encoded by Wcs19, the protein encoded by Wcs120 contains two repeated domains that are highly conserved among RAB (rice abscisic acid-induced) and dehydrin families and appears to be light-independent. The Wcs120 protein does not however contain a serine-rich sequence present in RAB and dehydrin families. Finally, the present invention also relates to a third gene, Wcor410, also induced by low temperature as well as water stress and, to a lesser extend, by ABA. Its expression is light-independent. The protein encoded by this gene contains a serine-rich stretch as found in several drought induced proteins.
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