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SYNTHETIC PROMOTOR INDUCED BY ABIOTIC STRESS

[Category : - OTHER- Agriculture]
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The present invention relates with the technical field of biotechnology, and particularly provides a promoter inducible under abiotic stress conditions, which is used to regulate expression of a nucleotide sequence encoding a product of interest under these conditions. The invention also refers to a genetic construction containing said promoter, the plant cells transformed with said construction as well as the transgenic plants that can be regenerated from said cells, and which are capable of growing and developing properly, keeping high levels of productive yield under abiotic stress conditions.rnPromoter is optimized for vector construction. The promoter is not ABA (abscisic acid) dependent, which avoids inducing transcription that would negatively affect normal plant development. Field trial: 3-fold better grain yield by maize plants under extreme drought-stress conditions in which control maize plants yielded only 20% of the yield from similar control plants grown in well-watered plots. Tests were carried out in different conditions and treatments, where it was observed that the levels of photosynthesis and stomatal conductance exhibited by the different transgenic lines are superior to those shown by the null segregating plants. In addition, this difference is accentuated in the trial with a more severe stress treatment.


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The global market for genetically modified (GM) foods is rapidly expanding, despite the controversies over their safety. In general, specialty crops are a more high-value agricultural segment than field crops and offer farmers a greater return on investment.
GM crops with drought tolerance are under development, but few of them have reached the market. Although many genes have been identified that can improve drought tolerance in plants and some drought-tolerant crops have been developed, progress has been rather limited regarding producing such crops for field condition or commercialization.

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