There are no genes for "drought resistance"! May I suggest you think of the problem in a more complicated but realistic way? First define what you mean by drought resistance, then understand how the plant adapts to particular conditions of water supply etc, e.g. by so-called drought avoidance, Mechanisms have been analysed very often, and there is a large literature. Genes code for proteins which contribute to systems which may have been selected during evolution allowing plants to live in particular conditions, such as places with limited rainfall relative to evapotranspiration. Genes involved in such adaptation may code for proteins determining smaller leaf surface area and larger root surface area and greater depth in one species than in other . Or they determine the ability to make protective pigments or compounds, allowing plants to survive water deficits.

I am sorry to say that there has been much ill-considered talk about "genes for drought resistance" and many incorrect claims that genetically modified plants are drought resistant, based on incorrect methods of assessment.. A very much more critical analysis is required. Please see Lawlor DW 2013. Genetic engineering to improve plant performance under drought: physiological evaluation of achievements, limitations, and possibilities.J Exp Bot. (1):83-108. doi: 10.1093/jxb/ers326. Epub 2012 Nov 16.

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Dear Abdel Rahman Mohammad Al Tawaha

Thanks for your answer

There are no genes for "drought resistance"! May I suggest you think of the problem in a more complicated but realistic way? First define what you mean by drought resistance, then understand how the plant adapts to particular conditions of water supply etc, e.g. by so-called drought avoidance, Mechanisms have been analysed very often, and there is a large literature. Genes code for proteins which contribute to systems which may have been selected during evolution allowing plants to live in particular conditions, such as places with limited rainfall relative to evapotranspiration. Genes involved in such adaptation may code for proteins determining smaller leaf surface area and larger root surface area and greater depth in one species than in other . Or they determine the ability to make protective pigments or compounds, allowing plants to survive water deficits.

I am sorry to say that there has been much ill-considered talk about "genes for drought resistance" and many incorrect claims that genetically modified plants are drought resistant, based on incorrect methods of assessment.. A very much more critical analysis is required. Please see Lawlor DW 2013. Genetic engineering to improve plant performance under drought: physiological evaluation of achievements, limitations, and possibilities.J Exp Bot. (1):83-108. doi: 10.1093/jxb/ers326. Epub 2012 Nov 16.

Dear David W. Lawlor

Thanks for your guidance and Recommendation

I mean the gene network involved in the tolerance of the plant to drought stress. For example, Genes involved in biosynthesis of ABA and proline.

surely i get your article. It seems to be useful.

With best regards

Hello Sarah

Thanks - it does help to look at the system and identify what aspects of physiology and biocemistry are important and then address the genes responsible.

Best wishes

David