Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. Autotetraploids
Mango can be grown in subtropical and semi-arid regions, where using commercial cultivars and rootstocks with improved resistance to drought is crucial. Induction of polyploidy has been widely applied in breeding programs for increasing crop drought resistance. In this study, drought resistance of s...
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| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/13/1/277 |
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| author | Alicia V. Perera-Castro Beatriz Hernández Maria José Grajal-Martín Águeda M. González-Rodríguez |
| author_facet | Alicia V. Perera-Castro Beatriz Hernández Maria José Grajal-Martín Águeda M. González-Rodríguez |
| author_sort | Alicia V. Perera-Castro |
| collection | DOAJ |
| description | Mango can be grown in subtropical and semi-arid regions, where using commercial cultivars and rootstocks with improved resistance to drought is crucial. Induction of polyploidy has been widely applied in breeding programs for increasing crop drought resistance. In this study, drought resistance of several mango cultivars and their respective autotetraploids was evaluated. Leaf morphology and physiology were monitored in two-year-old plants during a period of water withholding and subsequent rewatering. Even though all tetraploid cultivars presented morphological differences in leaf traits, the effect of ploidy in delaying leaf water loss and its detrimental effects of photosynthesis was only observed in ‘Gomera-1’. As a result of this, this cultivar sustained maximum levels of quantum efficiency and gas exchange for a longer period than the rest of cultivars. Therefore, the isohydric strategy of this tetraploid was not associated with earlier stomatal closure. Proline did not increase in the isohydric cultivar probably due to the maintenance of high leaf relative water content. In contrast, in some anisohydric mangos, proline increased when leaf water content decreased below 80%. Some diploids exhibited higher levels of proline than tetraploids, but recovery of plant functionality after rewatering did not differ from the rest of cultivars. We conclude that drought resistance in mango can be improved by using polyploids with water-saving physiological traits. |
| first_indexed | 2024-03-09T13:49:10Z |
| format | Article |
| id | doaj.art-78a8387d5a2d4a2db518c1a1ea816d85 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T13:49:10Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-78a8387d5a2d4a2db518c1a1ea816d852023-11-30T20:52:23ZengMDPI AGAgronomy2073-43952023-01-0113127710.3390/agronomy13010277Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. AutotetraploidsAlicia V. Perera-Castro0Beatriz Hernández1Maria José Grajal-Martín2Águeda M. González-Rodríguez3Departamento de Botánica, Ecología y Fisiología Vegetal, Universidad de La Laguna, 38206 La Laguna, SpainDepartamento de Botánica, Ecología y Fisiología Vegetal, Universidad de La Laguna, 38206 La Laguna, SpainDepartamento de Producción Vegetal en Zonas Tropicales y Subtropicales, Instituto Canario de Investigaciones Agrarias (ICIA), 38270 La Laguna, SpainDepartamento de Botánica, Ecología y Fisiología Vegetal, Universidad de La Laguna, 38206 La Laguna, SpainMango can be grown in subtropical and semi-arid regions, where using commercial cultivars and rootstocks with improved resistance to drought is crucial. Induction of polyploidy has been widely applied in breeding programs for increasing crop drought resistance. In this study, drought resistance of several mango cultivars and their respective autotetraploids was evaluated. Leaf morphology and physiology were monitored in two-year-old plants during a period of water withholding and subsequent rewatering. Even though all tetraploid cultivars presented morphological differences in leaf traits, the effect of ploidy in delaying leaf water loss and its detrimental effects of photosynthesis was only observed in ‘Gomera-1’. As a result of this, this cultivar sustained maximum levels of quantum efficiency and gas exchange for a longer period than the rest of cultivars. Therefore, the isohydric strategy of this tetraploid was not associated with earlier stomatal closure. Proline did not increase in the isohydric cultivar probably due to the maintenance of high leaf relative water content. In contrast, in some anisohydric mangos, proline increased when leaf water content decreased below 80%. Some diploids exhibited higher levels of proline than tetraploids, but recovery of plant functionality after rewatering did not differ from the rest of cultivars. We conclude that drought resistance in mango can be improved by using polyploids with water-saving physiological traits.https://www.mdpi.com/2073-4395/13/1/277autopolyploidymangoprolinestomatal conductancewater stress |
| spellingShingle | Alicia V. Perera-Castro Beatriz Hernández Maria José Grajal-Martín Águeda M. González-Rodríguez Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. Autotetraploids Agronomy autopolyploidy mango proline stomatal conductance water stress |
| title | Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. Autotetraploids |
| title_full | Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. Autotetraploids |
| title_fullStr | Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. Autotetraploids |
| title_full_unstemmed | Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. Autotetraploids |
| title_short | Assessment of Drought Stress Tolerance of <i>Mangifera indica</i> L. Autotetraploids |
| title_sort | assessment of drought stress tolerance of i mangifera indica i l autotetraploids |
| topic | autopolyploidy mango proline stomatal conductance water stress |
| url | https://www.mdpi.com/2073-4395/13/1/277 |
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