| Journal: | Revista brasileira de fisiologia vegetal |
| Database: | PERIÓDICA |
| System number: | 000279383 |
| ISSN: | 0103-3131 |
| Authors: | Pystina, Natalia V1 Danilov, Roman A |
| Institutions: | 1Mid Sweden University, Department of Natural & Environmental Sciences, Harnosand. Suecia |
| Year: | 2001 |
| Volumen: | 13 |
| Number: | 2 |
| Pages: | 285-292 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | Influence of different light regimes (plants grown in shade and in the sun) on respiration, activity of alternative respiratory pathway and carbohydrates content in mature leaves of Ajuga reptans L. was investigated. All experiments were carried out under natural conditions. Sun plants had higher respiration, activity of the alternative pathway and carbohydrates content compared to the shade plants. Additional experiments were performed in order to study effects of darkening as well as evolution of respiration and carbohydrates concentrations in leaves of A. reptans during the day. Darkening led to a decline in total respiration in all types of plants investigated. Activity of the alternative pathway remained unchanged by 20 % in the leaves of the shade plants. On the other hand, darkness led to a twofold decrease in the activity of the alternative pathway in the leaves of the sun plants. Content of soluble carbohydrates in the darkness did not change in the leaves of the shade plants while significantly decreased in the leaves of the sun plants. Total respiration in the mature leaves of the shade plants studied did not change significantly during the day. However, a significant increase in the total respiration was detected in the mature leaves of the sun plants in the evening and in the night. Activity of the alternative respiratory pathway did not change significantly in the leaves of the shade plants during the day and corresponds to ca 20 % of the total respiration. The sun plants examined exhibited significantly higher activi |
| Disciplines: | Biología, Química |
| Keyword: | Fisiología vegetal, Bioquímica, Vía respiratoria alterna, Respiración, Oxidasas, Hojas, Luz, Carbohidratos |
| Keyword: | Biology, Chemistry, Plant physiology, Biochemistry, Alternative respiratory pathway, Respiration, Oxidase, Leaves, Light, Carbohydrates |
| Full text: | Texto completo (Ver HTML) |
