Relationships between phenology and the remobilization of nitrogen, phosphorus and potassium in branches of eight Mediterranean evergreens
| العنوان: | Relationships between phenology and the remobilization of nitrogen, phosphorus and potassium in branches of eight Mediterranean evergreens |
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| المؤلفون: | Pilar Castro-Díez, Rubén Milla, Gabriel Montserrat-Martí, M. Maestro-Martínez |
| المصدر: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Wiley, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Nitrogen, Physiology, Vegetative reproduction, Leaf shedding, chemistry.chemical_element, Plant Science, Biology, Models, Biological, Phosphorus metabolism, Nutrient, Species Specificity, Botany, Nitrogen cycle, Ecosystem, Mediterranean Region, Bud, Phenology, Phosphorus, fungi, food and beverages, Vegetative growth, Nutrient remobilization, Reproductive growth, Evergreen, Tracheophyta, Agronomy, chemistry, Potassium, Seasons, Mediterranean climate, Evergreens |
| الوصف: | 12 páginas, 3 figuras, 2 tablas. Few studies have examined the effects of plant growth on nutrient remobilization in phenologically contrasting species. Here we evaluated the consequences of above-ground seasonality of growth and leaf shedding on the remobilization of nutrients from branches in eight evergreen Mediterranean phanaerophytes that differ widely in phenology. Vegetative growth, flower bud formation, flowering, fruiting, leaf shedding, and the variations in nitrogen (N), phosphorus (P) and potassium (K) pools in branches throughout the year were monitored in each species. Nitrogen and P remobilization occurred in summer, after vegetative growth and synchronously with leaf shedding. Despite the time-lag between growth and remobilization, the branches that invested more nutrients in vegetative growth also remobilized more nutrients from their old organs. Potassium remobilization peaked in the climatically harshest periods, and appears to be related to osmotic requirements. We conclude that N and P remobilization occurs mainly associated with leaf senescence, which might be triggered by factors such as the replenishment of nutrient reserves in woody organs, the hormonal relations between new and old leaves, or the constraints that summer drought poses on the amount of leaf area per branch in summer. This study was supported by the Comisión Interministerial de Ciencia y Tecnología (Spanish government) projects REN 2000-0163-P4-05, REN2002-02635/GLO, and the Thematic Network GLOBIMED (REN 2001–4841-E/GLO. The ‘Gobierno de Aragón’ project P-024/2001 provided financial support to R. M. |
| تدمد: | 1469-8137 0028-646X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c85af0d660bf835edca1980af7d419bTest https://doi.org/10.1111/j.1469-8137.2005.01477.xTest |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....6c85af0d660bf835edca1980af7d419b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14698137 0028646X |
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