Assessment of Drought Stress Tolerance of Mangifera indica L. Autotetraploids

Mango can be grown in subtropical and semi-arid regions, where using commercial cultivars rootstocks with improved resistance to drought is crucial. Induction of polyploidy has been widely applied breeding programs for increasing crop resistance. In this study, several mango their respective autotetraploids was evaluated. Leaf morphology physiology were monitored two-year-old plants during a period water withholding subsequent rewatering. Even though all tetraploid presented morphological differences leaf traits, the effect ploidy delaying loss its detrimental effects photosynthesis only observed ‘Gomera-1’. As result this, cultivar sustained maximum levels quantum efficiency gas exchange longer than rest cultivars. Therefore, isohydric strategy not associated earlier stomatal closure. Proline did increase probably due maintenance high relative content. contrast, some anisohydric mangos, proline increased when content decreased below 80%. Some diploids exhibited higher tetraploids, but recovery plant functionality after rewatering differ from We conclude that by polyploids water-saving physiological traits.