Evolution of primary metabolites and photosynthetic pigments during ontogeny of cotyledons of quinoa (Chenopodium quinoa Willd.) under salt stress
Ruffino, Ana M. C.; Mariana Rosa; Mirna Hilal; Juan A. González and Fernando E. Prado. 2008. “Evolution of primary metabolites and photosynthetic pigments during ontogeny of cotyledons of quinoa (Chenopodium quinoa Willd.) under salt stress”. Lilloa 45 (1-2). Development variation (FW and DW) and photosynthetic pigments (chlorophyll and carotenoids), soluble carbohydrates (sucrose, glucose and fructose), lipids (phospholipids, glycolipids and sterols), soluble proteins and proline content variations were studied during ontogenetic cycle of quinoa cotyledons (Chenopodium quinoa Willd.) under salinity condition. Results showed that presence of salt (230 mM) affects the distribution as well as the content of most the analyzed compounds. Photosynthetic pigments, lipids and soluble proteins were significantly lower in stressed cotyledons; while, soluble carbohydrates (glucose and sucrose) contents were higher than in control cotyledons. On the other hand, free proline content didn’t exhibit significant changes between control and stressed cotyledons during the first twelve days, and then it showed a strong increment, bigger to 600%, in control cotyledons, and in a smaller proportion (+170%) in stressed cotyledons. Although phospholipids/glycolipids ratio didn’t show significant variations along the ontogenetic cycle in both treatments, the lowest values were observed in stressed cotyledons. On the basis of these results we discussed the effects of saline stress on cotyledonar ontogeny.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | spa |
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Fundación Miguel Lillo
2008
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| Online Access: | http://www.lillo.org.ar/journals/index.php/lilloa/article/view/468 |
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