The effect of supraoptimal temperatures on the contents of krebs' cycle acids in Arabidopsis thaliana
| Autor: | D.S. Anthony, Aziz Shiralipour |
|---|---|
| Rok vydání: | 1969 |
| Předmět: |
chemistry.chemical_classification
fungi food and beverages Sowing Plant Science General Medicine Horticulture Biology biology.organism_classification Biochemistry Citric acid cycle chemistry.chemical_compound chemistry Shoot Botany Arabidopsis thaliana Malic acid Citric acid Molecular Biology Organic acid |
| Zdroj: | Phytochemistry. 8:1179-1183 |
| ISSN: | 0031-9422 |
| DOI: | 10.1016/s0031-9422(00)85554-5 |
| Popis: | The effect of supraoptimal temperatures on the contents of several Kreb's cycle acids in Arabidopsis thaliana (L.) Heynh was investigated. Plants grown at the higher temperatures (32° day and 25° night) were lower in dry and fresh weights than those grown at the optimal temperatures (25° day and 18° night). Citric, succinic, fumaric, and malic acid concentrations were measured at 2, 3 and 4 weeks after planting. Although the sum of the amounts of the four acids was generally higher in the shoots of plants grown at supraoptimal temperatures than in those grown at optimal temperatures, at 3 weeks after planting, the reverse was true. This latter result was due largely to changes in the fumaric and malic acid contents. From the second to the third week of growth, the contents of these two acids dropped in higher temperature plants and rose sharply in the optimal temperature plants with an exactly opposite trend occurring from the third to fourth weeks of growth. In the fourth week, the citric acid content decreased to a very low value under optimal conditions and increased under supraoptimal conditions. The results show that malic and succinic acids are strikingly different with respect to compartmentation or to the directness of their association with the Krebs' cycle. The data provide information on changes in organic acid content in shoots through most of the life cycle of a plant, and they further show that temperature can affect organic acid levels at any given time. |
| Databáze: | OpenAIRE |
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