INAHE   25987
INSTITUTO DE AMBIENTE, HABITAT Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
URBAN TREES GROWTH AND WATER STRESS. RELATIONSHIP BETWEEN ANNUAL TREE-RINGS AND CALCIUM SIGNAL: RESULTS USING LASER-INDUCED BREAKDOWN SPECTROSCOPY (LIBS)
Autor/es:
ROIG F. A.; MARTINEZ C. F.
Revista:
BIOCELL
Editorial:
INST HISTOL EMBRIOL-CONICET
Referencias:
Año: 2019 vol. 43 p. 238 - 239
ISSN:
0327-9545
Resumen:
The water availability incidence in the urban trees growth can be quantified by dendrochronological analyzes. The tree-rings time series constructions allow evidence the differential thickness of the annual rings and their chemical composition. It were studied Platanus hispanica Tend., a frequent and representative tree-specie in the urban landscape of Mendoza-Argentina. It was analyzed at anatomical and dendrochemical level, in a comparative way, the tree-rings growth of different thickness: wide -that indicates an adequate water availability- and narrow -resulting by growth under water restriction-. Methodologically, the analytical technique called Laser-Induced Breakdown Spectroscopy-LIBS- is applied, and also tree-ring measurements. This allows to evaluate the chemical content present in wood, particularly those related to drought periods, such as Calcium. The first results for study cases -Urban and Periurban- indicate as tendency that the average Calcium tenor is proportional to the thickness of the tree-rings. The periurban trees have a lower content than those located in an urban condition, where the soil content of this element is higher given the greater urbanization of the area. In future studies and with a larger number of cases, it is expected to develop a water stress indicator based on the qualitative and semi-quantitative content of Calcium in tree-rings, which will allow to know the response and adaptation mechanisms of this tree-specie, to drought and water deficit.