Refine search
Results 1-10 of 14
Predisposition of trees by air pollutants to low temperatures and moisture stress.
1995
Chappelka A.H. | Freer Smith P.H.
The contributing role of SO2 and drought in forest decline of Austrian pine in coastal Croatia
2002
Diminic, D. (University of Zagreb, Zagreb (Croatia). Faculty of Forestry) | Hrsovec, B. | Potocic, N.
This case study confirms the role of air pollution impact on forest susceptibility to other abiotic and biotic detrimental factors. It is however very important to take into account numerous contributing factors in order to interpret or predict the degree of damage correctly
Show more [+] Less [-]Chronic drought stress reduced but not protected Shantung maple (Acer truncatum Bunge) from adverse effects of ozone (O3) on growth and physiology in the suburb of Beijing, China
2015
Li, Li | Manning, William J. | Tong, Lei | Wang, Xiaoke
A two-year experiment exposing Acer truncatum Bunge seedlings to elevated ozone (O3) concentrations above ambient air (AO) and drought stress (DS) was carried out using open-top chambers (OTCs) in a suburb of Beijing in north China in 2012–2013. The results suggested that AO and DS had both significantly reduced leaf mass area (LMA), stomatal conductance (Gs), light saturated photosynthetic rate (Asat) as well as above and below ground biomass at the end of the experiment. It appeared that while drought stress mitigated the expression of foliar injury, LMA, leaf photosynthetic pigments, height growth and basal diameter, due to limited carbon fixation, the O3 – induced reductions in Asat, Gs and total biomass were enhanced 23.7%. 15.5% and 8.1% respectively. These data suggest that when the whole plant was considered that drought under the conditions of this experiment did not protect the Shantung maple seedlings from the effects of O3.
Show more [+] Less [-]Effects of soil texture and drought stress on the uptake of antibiotics and the internalization of Salmonella in lettuce following wastewater irrigation
2016
Zhang, Yuping | Sallach, J Brett | Hodges, Laurie | Snow, Daniel D. | Bartelt-Hunt, Shannon L. | Eskridge, Kent M. | Li, Xu
Treated wastewater is expected to be increasingly used as an alternative source of irrigation water in areas facing fresh water scarcity. Understanding the behaviors of contaminants from wastewater in soil and plants following irrigation is critical to assess and manage the risks associated with wastewater irrigation. The objective of this study was to evaluate the effects of soil texture and drought stress on the uptake of antibiotics and the internalization of human pathogens into lettuce through root uptake following wastewater irrigation. Lettuce grown in three soils with variability in soil texture (loam, sandy loam, and sand) and under different levels of water stress (no drought control, mild drought, and severe drought) were irrigated with synthetic wastewater containing three antibiotics (sulfamethoxazole, lincomycin and oxytetracycline) and one Salmonella strain a single time prior to harvest. Antibiotic uptake in lettuce was compound-specific and generally low. Only sulfamethoxazole was detected in lettuce with increasing uptake corresponding to increasing sand content in soil. Increased drought stress resulted in increased uptake of lincomycin and decreased uptake of oxytetracycline and sulfamethoxazole. The internalization of Salmonella was highly dependent on the concentration of the pathogen in irrigation water. Irrigation water containing 5 Log CFU/mL Salmonella resulted in limited incidence of internalization. When irrigation water contained 8 Log CFU/mL Salmonella, the internalization frequency was significantly higher in lettuce grown in sand than in loam (p = 0.009), and was significantly higher in lettuce exposed to severe drought than in unstressed lettuce (p = 0.049). This work demonstrated how environmental factors affected the risk of contaminant uptake by food crops following wastewater irrigation.
Show more [+] Less [-]Modelling stomatal responses of spring wheat (Triticum aestivum L. cv. Turbo) to ozone and different levels of water supply
1995
Gruters, U. | Fangmeier, A. | Jager, H.J. (Institut fur Pflanzenokologie, Heinrich-Buff-Ring 38, D-35392 Giessen (Germany))
The effects of prior exposure to sulphur dioxide and nitrogen dioxide on the water relations of timothy grass (Phleum pratense) under drought conditions
1990
Lucas, P.W. (Institute of Environmental and Biological Sciences, Division of Biological Sciences, Lancaster University, Lancaster LA1 4YQ (United Kingdom))
Growth, ectomycorrhizae and nonstructural carbohydrates of loblolly pine seedlings exposed to ozone and soil water deficit
1990
Meier, S. | Grand, L.F. | Schoeneberger, M.M. | Reinert, R.A. | Bruck, R.I. (Department of Plant Pathology, North Carolina State University, Raleigh, NC 27695-7616 (USA))
The adaptation of Silene vulgaris to growth on a calamine waste heap (S. Poland)
1998
Wierzbicka, M. | Panufnik, D. (Environmental Plant Pollution Laboratory, Department of Morphogenesis, Institute of Plant Experimental Biology, University of Warsaw, Krakowskie Przedmiescie 26/28, 00-927 Warsaw (Poland))
Radish (Raphanus sativus L.): a model for studying plant responses to air pollutants and other environmental stresses
1993
Kostka-Rick, R. | Manning, W.J. (Department of Plant Pathology, University of Massachusetts, Amherst, MA 01003 (USA))
Interactions between Sitka spruce, the green spruce aphid, sulphur dioxide pollution and drought
1990
Warrington, S. | Whittaker, J.B. (Bath College of Higher Education, Newton Park, Bath BA2 9BN (United Kingdom))