Drought stress affects physiological parameters but not tuber yield in three Andean potato (Solanum tuberosum L.) cultivars
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional de Colombia
2017
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| _version_ | 1876440257597014016 |
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| author | Loyla Rodríguez-Pérez |
| author_facet | Loyla Rodríguez-Pérez |
| contents | Drought stress affects physiological parameters but not tuber yield in three Andean potato (Solanum tuberosum L.) cultivars Loyla Rodríguez-Pérez Carlos Eduardo Ñústez L. Liz Patricia Moreno F. Agrociencias Carotenoid photoprotection leaf temperature chlorophyll ratio electrolyte leakage This study evaluated the effect of water deficit on the physiological response and yield of three Andean potato cultivars. Leaf water potential (Ψw), soil matric potential (SMP), photosynthesis (A), stomatal conductance (gs), transpiration (E), intrinsic water use efficiency (WUEi), leaf temperature (LT), chlorophyll fluorescence parameters, chlorophyll (Chl), carotenoids (Car), electrolyte leakage (EL), growth and yield (Y). Parameters were determined in well-watered (WW) and drought-stressed (DS) plants. The three DS cultivars showed a decrease in leaf Ψw from the first day of treatment and reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar. The values of A, gs and E in the DS cultivars decreased from the first DAT. The LT reached the highest values when gs showed the lowest values for the three DS cultivars. WUEi was higher in Es under DS plants but lower in DC under DS. The PSII photochemical efficiency (Fv/Fm) showed values greater than 0.8 for all DS cultivars under DS, suggesting the absence of non-stomatal limitations for A. The Chl content increased in the Es cultivar under DS from 5 to 7 DAT compared to WW plants. Carotenoids (Ca) contents, the Car/Chl ratio, and EL increased in the three DS cultivars. There were no differences in yield and growth parameters between WW and DS cultivars. These results suggest that the three cultivars developed mechanisms to overcome the stress. One of these mechanisms could be the early synthesis of Car, which may maintain photosystem II function under water stress 2017 artículo científico 0120-9965 https://www.redalyc.org/articulo.oa?id=180353882004 https://www.redalyc.org/journal/1803/180353882004/ https://www.redalyc.org/journal/1803/180353882004/html/ https://www.redalyc.org/journal/1803/180353882004/180353882004.epub https://www.redalyc.org/journal/1803/180353882004/movil en http://www.redalyc.org/revista.oa?id=1803 Agronomía Colombiana application/pdf Universidad Nacional de Colombia Agronomía Colombiana (Colombia) Num.2 Vol.35 |
| format | Artículo científico |
| id | redalyc_180353882004 |
| institution | Redalyc |
| language | en |
| publishDate | 2017 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Drought stress affects physiological parameters but not tuber yield in three Andean potato (Solanum tuberosum L.) cultivars Loyla Rodríguez-Pérez Agrociencias Carotenoid photoprotection leaf temperature chlorophyll ratio electrolyte leakage Drought stress affects physiological parameters but not tuber yield in three Andean potato (Solanum tuberosum L.) cultivars Loyla Rodríguez-Pérez Carlos Eduardo Ñústez L. Liz Patricia Moreno F. Agrociencias Carotenoid photoprotection leaf temperature chlorophyll ratio electrolyte leakage This study evaluated the effect of water deficit on the physiological response and yield of three Andean potato cultivars. Leaf water potential (Ψw), soil matric potential (SMP), photosynthesis (A), stomatal conductance (gs), transpiration (E), intrinsic water use efficiency (WUEi), leaf temperature (LT), chlorophyll fluorescence parameters, chlorophyll (Chl), carotenoids (Car), electrolyte leakage (EL), growth and yield (Y). Parameters were determined in well-watered (WW) and drought-stressed (DS) plants. The three DS cultivars showed a decrease in leaf Ψw from the first day of treatment and reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar. The values of A, gs and E in the DS cultivars decreased from the first DAT. The LT reached the highest values when gs showed the lowest values for the three DS cultivars. WUEi was higher in Es under DS plants but lower in DC under DS. The PSII photochemical efficiency (Fv/Fm) showed values greater than 0.8 for all DS cultivars under DS, suggesting the absence of non-stomatal limitations for A. The Chl content increased in the Es cultivar under DS from 5 to 7 DAT compared to WW plants. Carotenoids (Ca) contents, the Car/Chl ratio, and EL increased in the three DS cultivars. There were no differences in yield and growth parameters between WW and DS cultivars. These results suggest that the three cultivars developed mechanisms to overcome the stress. One of these mechanisms could be the early synthesis of Car, which may maintain photosystem II function under water stress 2017 artículo científico 0120-9965 https://www.redalyc.org/articulo.oa?id=180353882004 https://www.redalyc.org/journal/1803/180353882004/ https://www.redalyc.org/journal/1803/180353882004/html/ https://www.redalyc.org/journal/1803/180353882004/180353882004.epub https://www.redalyc.org/journal/1803/180353882004/movil en http://www.redalyc.org/revista.oa?id=1803 Agronomía Colombiana application/pdf Universidad Nacional de Colombia Agronomía Colombiana (Colombia) Num.2 Vol.35 |
| title | Drought stress affects physiological parameters but not tuber yield in three Andean potato (Solanum tuberosum L.) cultivars |
| topic | Agrociencias Carotenoid photoprotection leaf temperature chlorophyll ratio electrolyte leakage |
| url | https://www.redalyc.org/articulo.oa?id=180353882004 https://www.redalyc.org/journal/1803/180353882004/ https://www.redalyc.org/journal/1803/180353882004/html/ https://www.redalyc.org/journal/1803/180353882004/180353882004.epub https://www.redalyc.org/journal/1803/180353882004/movil |