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Water deficit and recovery response of Medicago truncatula plants expressing the ELIP-like DSP22 |
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| Authors: | S S Araújo A S Duque J M Silva D Santos A B Silva P Fevereiro |
| Institution: | 1235. Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2781-901, Oeiras, Portugal 2235. Faculdade de Medicina Veterinária, Instituto de Investiga??o Científica e Tropical, 1300-477, Lisboa, Portugal 3235. Departamento de Biologia Vegetal, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisboa, Portugal 4235. BioFIG, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisboa, Portugal |
| Abstract: | In this article, we present the response of Medicago truncatula Gaert. cv. Jemalong plants expressing constitutively the Dsp22 gene from Craterostigma plantagineum to water stress and rehydration. The Dsp22 gene encodes an ELIP-like protein thought to protect the chloroplast against photooxidative damage during the dehydration and rehydration. The Dsp22 transgenic homozygous M. truncatula plants showed higher amount of chlorophyll (Chl), lower Chl a/Chl b ratio and higher actual efficiency of energy conversion in photosystem 2 (ΦPSII) after rehydration, when compared to the wild type. The combined data from the Chl a fluorescence analysis, pigment quantification and biomass accumulation showed that transgenic M. truncatula plants are able to recover from water deprivation better than wild type plants. |
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