Refinar búsqueda
Resultados 1-8 de 8
Changes in pigment concentration and composition in Norway spruce induced by long-term exposure to low levels of ozone.
1995
Mikkelsen T.N. | Dodell B. | Lutz C.
The effects of sodium erythorbate and ethylenediurea on photosynthetic function of ozone-exposed loblolly pine seedlings
1999
Kuehler, E.A. | Flagler, R.B. (Department of Forest Science, Texas Agriculture and Mechanical University, College Station, TX 77843 (USA))
Differences in responses to urban air pollutants by Ligustrum lucidum Ait. and Ligustrum lucidum Ait. f. tricolor (Rehd.) Rehd
1996
Carreras, H.A. | Canas, M.S. | Pignata, M.L. (Catedra de Quimica General, Facultad de Ciencias Exactas, Fisicas y Naturales, Universidad Nacional de Cordoba, Avda Velez Sarsfield 299, 5000 Cordoba (Argentina))
Seasonal variation of gas exchange and pigmentation in branches of three grafted clones of mature ponderosa pine exposed to ozone and acid rain
1997
Anderson, P.D. | Houpis, J.L.J. | Helms, J.A. | Momen, B. (USDA Forest Service, Forestry Sciences Laboratory, Rhinelander, Wisconsin (USA))
Vicia faba as a bioindicator of oil pollution
1996
Malallah, G. | Afzal, M. | Gulshan, S. | Abraham, D. | Kurian, M. | Dhami, M.S.I. (Department of Botany and Microbiology, Faculty of Science, Kuwait University, Safat (Kuwait))
Pigment changes in Norway spruce induced by dust pollution
1997
Mandre, M. (Estonian Academy of Sciences, Tallinn (Estonia). Dept. of Ecophysiology) | Tuulmets, L.
Changes in photosynthetic activity, chlorophyll-fluorescence parameters and pigment content of differently damaged Norway spruces during the vegetation period
1991
Rinderle, U. (Karlsruhe Univ. (Germany). Botanisches Inst.) | Lichtenthaler, H.K.
Content of pigments in the needles of Norway spruce and Scots pine in an area of cement production
2000
Mandre, M. | korsjukov, R. (Estonian Agricultural Univ., Tartu (Estonia). Forest Research Inst.)
The influence of air pollution from a cement plant on chlorophylls and carotenoids of the needles of Scots pine and Norway spruce was studied on the sample plots established at different distances from the emission centre in 1992, 1994 and 1999. No essential difference was observed in pigment concentrations in needles between 1992, when the emission of cement dust from the plant was very high, and 1999, when dust pollution had practically stopped. The negative influence on the synthesis of pigments in needles occurred through the alkalisation of soil and disbalances of mineral nutrients accumulation into the organism
Mostrar más [+] Menos [-]