خيارات البحث
النتائج 1 - 10 من 34
Effects of sulfur dioxide on growth, photosynthesis and enzyme activities of Chinese guger-tree seedlings.
1994
Sheu B.H.
Effects of SO(2), NO(2), and O(3) on population development and morphological and physiological parameters of native herb layer species in a beech forest.
1989
Steubing L. | Fangmeier A. | Both R. | Frankenfeld M.
Predisposition of trees by air pollutants to low temperatures and moisture stress.
1995
Chappelka A.H. | Freer Smith P.H.
Relationship between foliar injury and changes in antioxidant levels in red and Norway spruce exposed to acidic mists.
1991
Chen Y.M. | Lucas P.W. | Wellburn A.R.
Heavy-metal ecology of terrestrial plants, microorganisms and invertebrates. A review.
1989
Tyler G. | Balsberg Paahlsson A.M. | Bengtsson G. | Baaaath E. | Tranvik L.
Physiological responses of Ailanthus altissima Desf. young plants in an area with high ozone pollution levels
2002
Bussotti, F. (Universita di Firenze, Firenze (Italy). Dipartimento di Biologia Vegetale) | Desotgiu, R. | Grossoni, P. | Gravanio, E. | Rodriguez, R.M.
Ailanthus altissimia Desf. is a non-native species spread throughout the Southern Europe as invasive plant. It demonstrated to be very sensitive to ozone and ozone-polluted environment, develops brownish stipples on the upper leaf surface. In the 2001 summer 12 young plants were placed in a site near the city of Florence (Italy), where high levels of ozone were experienced. Six of them were regularly watered and six were watered only when the wilting of their leaves was evident. Regular assessments were done during the experiment. They concerned growth, production of new leaves, dead and shedding of old leaves, visible symptoms of damage, stomatal conductance and CO2 uptake, chlorophyll fluorescence. The results suggest that the sensitivity to ozone of watered plants is connected to their higher growth ratio and stomatal conductance. Ozone plays a more important role than drought in producing foliar stress conditions
اظهر المزيد [+] اقل [-]The ecophysiological indicators of air pollution stress of beech (Fagus sylvatica L.) in Zasavje area, Central Slovenia
2002
Kalpic, A.B. (Ecological Research and Industrial Cooperation, Velenje (Slovenia)) | Lasnik, C.R.: Simoncic, P.
Several investigations about air pollution impact on forests have been carried out in Slovenia during last thirty years, mainly using the Norway spruce (Picea abies [L.] Karst.) as the main bioindication species, but there is a lack of information about common beach (Fagus sylvatica L.) condition, the most important forest tree species in Slovenia and in Zasavje area. The assessment of air pollution effect on beech based on stress physiological indicators of foliage, macronutrients level in beech leaves and by assessment of crown defoliation was carried out altogether with necessary soils analyses of the selected beech stands. On the basis of all parameters it can be concluded that the worst condition of beech trees in Zasavje is due to high level of air pollution, mainly by sulphur dioxide and not by deficiency of macronutrients or unfavourable state of soils
اظهر المزيد [+] اقل [-]The impact of SO2 and SO2 + ascorbic acid treatments on growth and partitioning of dry matter in Trigonella foenum-graecum L
1996
Krishnayya, N.S.R. | Date, M.V. (Department of Botany, M.S. University, Baroda 390002 (India))
The individual and combined effects of ozone and simulated acid rain on growth, gas exchange rate and water-use efficiency of Pinus armandi Franch
1996
Shan YunFeng | Feng ZongWei | Izuta, T. | Aoki, M. | Totsuka, T. (United Graduate School, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183 (Japan))
Physiology, morphology, and ozone uptake of leaves of black cherry seedlings, saplings, and canopy trees
1995
Fredericksen, T.S. | Joyce, B.J. | Skelly, J.M. | Steiner, K.C. | Kolb, T.E. | Kouterick, K.B. | Savage, J.E. | Snyder, K.R. (Environmental Resources Research Institute, 220 Forest Resource Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802 (USA))
