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The interaction of So2 and root-knot nematode on tomato.
1993
Khan M.R. | Khan M.W.
Predisposition of trees by air pollutants to low temperatures and moisture stress.
1995
Chappelka A.H. | Freer Smith P.H.
Biomarker and hematological fieldwork with amphibians: is it necessary to sample all night?
2020
Brodeur, Celine Marie | Bahl, María Florencia | Natale, Guillermo Sebastian | Poliserpi, Maria Belen
In the context of the global amphibian crisis, biomonitoring constitutes a valuable assessment tool to provide critical up to date information on the status and health of amphibians worldwide. The aim of the current study was to evaluate the possible confounding effects of sex, size, and time since capture on enzymatic biomarkers and hematologic parameters of the South American frog Leptodactylus latrans. Frogs were collected by hand between 9 pm and 12 am on two consecutive nights. On the first night, captured frogs were transported for 2 h by car to laboratory installations, maintained overnight in plastic containers, and blood and tissue sampled on the next morning. In contrast, frogs collected on the second night were blood and tissue sampled in the field, immediately after the capture period. Hematological parameters were analyzed, and enzymatic activities of catalase, cholinesterase (ChE), and glutathione S-transferase (GST) were determined in the plasma, liver, kidney, and muscle. A sex difference was observed only for total white blood cell counts (WBC), females exhibiting significantly greater values than males. The packed cell volume (PCV), mean corpuscular hemoglobin concentration (MCHC), WBC, and muscle ChE activity were significantly correlated with snout-vent length (SVL). The correlation was inversed in the case of MCHC, WBC, and muscle ChE, while the correlation was positive between PCV and SVL. Most examined parameters presented similar values when frogs were sampled at night following capture or the next morning. Total red blood cells (RBCs) count, and plasma enzymatic activities of ChE and GST were the only parameters that presented significantly increased values in morning samplings compared with night samplings. Overall, the current study indicates that it is best to sample the frogs as soon as possible after capture if hematologic or plasmatic biomarkers are examined. Nevertheless, it is possible to sample on the next morning if tissular biomarkers are employed. | Instituto de Recursos Biológicos | Fil: Brodeur, Celine Marie Julie. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Bilológicos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. | Fil: Bahl, María Florencia. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Química. Centro de Investigaciones del Medio Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. | Fil: Natale, Guillermo S. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Química. Centro de Investigaciones del Medio Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. | Fil: Poliserpi, María Belen. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina
Показать больше [+] Меньше [-]Differentiation of ozone, heavy metal or biotic stress in leaves and needles
2002
Gunthardt-Goerg, M. S. | Vollenweider, P. (Swiss Federal Research Institute, Birmensdorf (Switzerland))
We aim to differentiate the various visible leaf symptoms in the field survey with microscopical methods, and to better know, how the leaf, tissue and cell response differs between injury from ozone, heavy metals (both oxidative stress) and biotic infections
Показать больше [+] Меньше [-]Norway spruce crown structure changes under long-term multiple stress impact in Central European mountains
2002
Moravec, I. | Cudlin, P. (Institute of Landscape Ecology, Academy of Sciences of the Czech Republic, Ceske Budejovice (Czech Republic). Department of Forest Ecology) | Polak, T.
Results obtained by crown status estimation and branch structure transformation assessment methods are also applicable at forest stand level. By means of these methods we can reconstruct a scheme of probable stress response history for individual trees with possibility to distinguish three different types of stress response behaviour. The goal of our study was to describe a stress response history of single trees and corresponding forest stands, diverse in different level of multiple stress impact, and to localize investigated trees in the stress response scheme
Показать больше [+] Меньше [-][To much nitrogen, aci and ozone: pollutant immissions are over the critical threshold]. | Trop d'azote, d'acide et d'ozone: les immissions polluantes depassent le seuil critique.
1997
Voltz, R. | Baumgartner, H.
Transcriptional activation of plant defence genes by short-term air pollutant stress
1995
Bahl, A. | Loitsch, S.M. | Kahl, G. (Plant Molecular Biology Group, Biozentrum, N-200, Johann Wolfgang Goethe-Universitat, Marie-Curie Str. 9, D-60439 Frankfurt/M (Germany))
Variations in chemical composition of birch foliage under air pollution stress and their consequences for Eriocrania miners
1995
Koricheva, J. | Haukioja, E. (Laboratory of Ecological Zoology, Department of Biology, University of Turku, FIN-20500 Turku (Finland))
Aerobic ethanol production by leaves: evidence for air pollution stress in trees of the Ohio River Valley, USA
1989
MacDonald, R.C. | Kimmerer, T.W. | Razzaghi, M. (Department of Forestry, University of Kentucky, Lexington, KY 40546-0073 (USA))
Effects of gaseous pollutants on crops and trees.. ed. 3
1996
Mansfield, T.A. | Lucas, P.W.