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Objectives:  Grapevine root system plays a great role in sensing and adapting to abiotic and biotic stresses. Identification of candidate genes involved in the tolerance to abiotic stress is becoming a crucial strategy to select and breed resilient genotypes. However, obtaining high quality RNA from grapevine roots under hydroponic culture is difficult. Hence, we have developed a new extraction procedure to improve RNA quality for root gene expression studies.    Methods:  Conventional RNA extraction methods using CTAB are not suitable for gene expression studies and need to be improved. Here we report the application of a CTAB- based method for RNA extraction using an additional clean-up purification step.    Results:  The RIN value of the resulting RNA indicated that our procedure allowed the purification of high RNA quality and quantity. Hence, the clean-up purification step efficiently eliminated contaminants which inhibit downstream applications. Derived RNA was successfully used for differential gene expression analysis in salt stressed grapevine by Northern Blot hybridizations.    Conclusion:  In this study, we developed an efficient RNA isolation protocol from hydroponic cultivated grapevine roots which yielded RNA suitable for gene expression studies. This will open large perspectives in grapevine functional genomics with the identification of pertinent genes of agronomic interest.

High quality RNA from hydroponically grown grapevine roots suitable for gene expression studies