Changes in free amino acid content and frost resistance in Nothofagus dombeyi leaves |
| |
| Affiliation: | 2. Instituto de Botánica, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile;1. Instituto de Bioquímica, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile;1. Centre d’Etudes Biologiques de Chizé (CEBC), UMR 7372-ULR CNRS, F-79360, France;2. Department of Evolutionary Zoology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;3. Norwegian Institute for Air Research, FRAM High North Research Centre for Climate and the Environment, N-9296 Tromsø, Norway;4. Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de la Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France;5. Norwegian Institute for Nature Research, Postboks 5685 Sluppen, N-7485 Trondheim, Norway;6. Norwegian Polar Institute, FRAM – High North Research Centre on Climate and the Environment, N-9296 Tromsø, Norway;7. Norwegian Institute for Nature Research, FRAM – High North Research Centre for Climate and the Environment, N-9296 Tromsø, Norway;1. Department of Food Science, University of Parma, Parco Area delle Scienze, 59/a, I-43124 Parma, Italy;2. Instituto de Investigaciones Científicas en Ciencias Agropecuarias, Fundación Univeristaria Juan de Castellanos JDC, Tunja, Boyacá, Colombia;1. Departamento de Agronomía, Universidad de Córdoba-Campus de Excelencia Internacional Agroalimentario ceiA3, Edificio C4, Campus de Rabanales, 14014 Córdoba, Spain;2. Instituto de Agricultura Sostenible, IAS-CSIC, 14080 Córdoba, Spain;3. Department of Ecology and Evolutionary Biology, U.C. Irvine, CA, USA;1. College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, PR China;2. Laboratory of Quality & Safety Risk Assessment for Dairy Products of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, PR China;3. Milk and Dairy Production Inspection Center of Ministry of Agriculture (Beijing), Beijing, 100193, PR China |
| |
| Abstract: | The annual course of frost resistance and free proline content was studied in leaves at different stages of development of a woody species (Nothofagus dombeyi) from Southern Chile. The freezing resistance reached a minimum in late spring or summer and a maximum in the autumn-winter period. Adult and juvenile trees showed a similar degree of resistance; meanwhile, cold resistance was maximum at the seedling stage. Free proline levels and frost resistance in leaves changed throughout the seasonal cycle, increasing in winter and decreasing in summer. Artificial hardening caused changes in amino acid content of leaves; while valine, proline, lysine, histidine, serine and alanine increased upon hardening, aspartic acid, glutamic acid and arginine decreased. The nature of cold-induced metabolic adjustments is discussed as well as its ecological significance. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
