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Abstract:

The relationship between water transport and photosynthesis represents the trade-off between carbon gain and water loss and was used to evaluate potential differences in water resource utilization among two dominant vegetation types of south Florida: subtropical evergreen broad leaf forests (hardwood hammocks) and pine woodlands (pine rocklands). We found consistent linear positive relationships between the quantum yield of photosystem II (φPSII), an index of photosynthetic capacity, and hydraulic conductivity per sapwood area (kS) and per leaf area (kL) across all species. The slope of the φPSII-kS relationship was steeper for hardwood hammock than for pine rockland species. Mean φPSII was greater in pine rockland species and was greater for a given kL than in hardwood hammock species. These results are consistent with previous observations demonstrating that pine rocklands tend to have better access to stable water sources than hardwood hammocks. We also found greater photosynthetic carbon isotope discrimination with increasing kS and kL in pine rockland species, but not in hardwood hammock species, suggesting increased stomatal conductance with increasing kS and kL, consistent with greater water availability in pine rockland habitats. Our study thus utilizes relationships between water transport and photosynthesis to evaluate hydraulic constraints on physiological function between two contrasting vegetation types with contrasting stability of water sources. © 2010 The Author(s).

Registro:

Documento: Artículo
Título:Hydraulic constraints on photosynthesis in subtropical evergreen broad leaf forest and pine woodland trees of the Florida Everglades
Autor:Jones, T.J.; Luton, C.D.; Santiago, L.S.; Goldstein, G.
Filiación:Agricultural Research Service, US Department of Agriculture, Reno, NV 89512, United States
Nevada Fisheries Resource Office, US Fish and Wildlife Service, Reno, NV 89502, United States
Botany and Plant Sciences, University of California, 2150 Batchelor Hall, Riverside, CA 92521, United States
University of Miami, P.O. Box 249118, Coral Gables, FL 33124, United States
Laboratorio de Ecología Funcional (CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II 2 piso, C1428EHA Buenos Aires, Argentina
Palabras clave:Carbon stable isotope; Chlorophyll fluorescence; Hydraulic conductivity; Photosynthetic capacity; South Florida; Carbon isotope discrimination; Carbon stable isotopes; Chlorophyll fluorescence; Florida Everglades; Hydraulic constraints; Leaf area; Photosynthetic capacity; Photosystem II; Physiological functions; Pine woodlands; Potential difference; Sapwood area; South Florida; Stomatal conductance; Vegetation type; Water availability; Water loss; Water resource utilization; Water source; Water transport; Chlorophyll; Fluorescence; Hardwoods; Hydraulic conductivity; Isotopes; Photosynthesis; Porphyrins; Vegetation; Water resources; Carbon; Chlorophylls; Fluorescence; Hardwoods; Isotopes; Photosynthesis; Plants; Water Resources
Año:2010
Volumen:24
Número:3
Página de inicio:471
Página de fin:478
DOI: http://dx.doi.org/10.1007/s00468-010-0415-z
Handle:http://hdl.handle.net/20.500.12110/paper_09311890_v24_n3_p471_Jones
Título revista:Trees - Structure and Function
Título revista abreviado:Trees Struct. Funct.
ISSN:09311890
CODEN:TRESE
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_09311890_v24_n3_p471_Jones.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09311890_v24_n3_p471_Jones

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Citas:

---------- APA ----------
Jones, T.J., Luton, C.D., Santiago, L.S. & Goldstein, G. (2010) . Hydraulic constraints on photosynthesis in subtropical evergreen broad leaf forest and pine woodland trees of the Florida Everglades. Trees - Structure and Function, 24(3), 471-478.
http://dx.doi.org/10.1007/s00468-010-0415-z
---------- CHICAGO ----------
Jones, T.J., Luton, C.D., Santiago, L.S., Goldstein, G. "Hydraulic constraints on photosynthesis in subtropical evergreen broad leaf forest and pine woodland trees of the Florida Everglades" . Trees - Structure and Function 24, no. 3 (2010) : 471-478.
http://dx.doi.org/10.1007/s00468-010-0415-z
---------- MLA ----------
Jones, T.J., Luton, C.D., Santiago, L.S., Goldstein, G. "Hydraulic constraints on photosynthesis in subtropical evergreen broad leaf forest and pine woodland trees of the Florida Everglades" . Trees - Structure and Function, vol. 24, no. 3, 2010, pp. 471-478.
http://dx.doi.org/10.1007/s00468-010-0415-z
---------- VANCOUVER ----------
Jones, T.J., Luton, C.D., Santiago, L.S., Goldstein, G. Hydraulic constraints on photosynthesis in subtropical evergreen broad leaf forest and pine woodland trees of the Florida Everglades. Trees Struct. Funct. 2010;24(3):471-478.
http://dx.doi.org/10.1007/s00468-010-0415-z