Veränderte Wundreaktion in der Apfelrinde durch Phytophthora-Exsudate     

Max Mornau  Dieter Treutter 《Gesunde Pflanzen》2003,55(4):98-104

  相似文献   

Bienen,Hummeln, Wespen im Garten und in der Landschaft     

Dieter Wittmann  Daniela Klein  Matthias Schindler  Vera Sieg  Michael Blanke 《Erwerbs-Obstbau》2004,46(1):20-20

  相似文献   

Hepatic lipidosis: Liver characteristics and acute phase proteins in affected turkeys     

Lea Middendorf  Marion Schmicke  Kristian Düngelhoef  Erwin Sieverding  Heinrich Windhaus  Dieter Mischok  Dimitri Radko  Christian Visscher 《Journal of animal physiology and animal nutrition》2021,105(Z2):70-78

The hepatic lipidosis (HL) in fattening turkeys is a disease has been known for a long time, but the cause and pathogenesis is still not clarified. A recent study reported unexplained high levels of iron in liver tissue of fattening turkeys suffering from HL. In this study, the iron status, possible infectious or inflammatory influences in form of an acute phase reaction and the analysis of fatty acid pattern in liver tissue of turkeys affected by HL were examined. Three cases of HL on three different fattening turkey farms were investigated during the outbreak of the disease. Clinically affected and non-affected animals were subjected to a pathological examination, where the diagnosis HL or non-affected was made. In total, 70 birds were examined (40 with HL, 30 without HL) and blood and liver samples were taken. Additionally, samples from 15 slaughtered birds were taken as a further control group. In liver tissue, the iron content and the content of long-chain fatty acids were determined; in blood samples, ferritin and transferrin were measured. The iron content in liver tissue was more than three times higher for animals with HL than among non-affected animals and the control group. The transferrin levels were lowest for animals with HL, highest in the control group and in between for non-affected animals. The fatty acid pattern in liver tissue of affected animals indicated a shift from polyunsaturated fatty acids to saturated fatty acids and monounsaturated fatty acids compared to the control group and the non-affected animals. Overall, the non-affected animals of a flock affected by HL were similar to the healthy animals of the abattoir. The low acute phase protein levels for animals with HL together with high iron contents could indicate a previous malnutrition/starvation period and/or severe liver damage for those animals suffering from HL.  相似文献   

Morphogenetic function of the pig ovary in relation to minerals and trace elements, and at the same time in humoral and glass-chromatographic view     

R Dieter 《Tier?rztliche Umschau》1974,29(12):685-6, 689-92

  相似文献   

Metabolic aspects of total body perfusion in dogs using profound hypothermia and severe hemodilution     

R A Dieter  W E Neville 《American journal of veterinary research》1972,33(3):485-491

  相似文献   

Distemper in stone martens (Martes foina, Erxl.) in Schleswig-Holstein. A contribution to the epidemiology of distemper     

P Steinhagen  W Nebel 《DTW. Deutsche tier?rztliche Wochenschrift》1985,92(5):178-181

  相似文献   

Einfluß von SO2 und HF auf freie Aminosäuren der Fichte (Picea abies [L.] Karsten)     

Hans-Jürgen Jüger  Dieter Grill 《Forest Pathology》1975,5(5):279-286

The influence of SO₂ and HF on free amino acids of spruce . The influence of the air pollutants SO₂ and HF on composition and amount of free amino acids was investigated. Distinct differences in the pattern of amino acids are caused, particularly in glutaminic acid and compounds based on it.  相似文献   

Neue Untersuchungen zur biologischen Bekämpfung verschleppter Forstinsekten     

Otto Eichhorn  Hubert Pschorn-Walcher  Dieter Schröder 《Journal of pest science》1965,38(7):104-109

Ohne Zusammenfassung  相似文献   

Stomatal conductance, transpiration and sap flow of tropical montane rain forest trees in the southern Ecuadorian Andes     

Motzer T  Munz N  Küppers M  Schmitt D  Anhuf D 《Tree physiology》2005,25(10):1283-1293

We investigated tree water relations in a lower tropical montane rain forest at 1950-1975 m a.s.l. in southern Ecuador. During two field campaigns, sap flow measurements (Granier-type) were carried out on 16 trees (14 species) differing in size and position within the forest stand. Stomatal conductance (g(s)) and leaf transpiration (E(l)) were measured on five canopy trees and 10 understory plants. Atmospheric coupling of stomatal transpiration was good (decoupling coefficient Omega = 0.25-0.43), but the response of g(s) and E(l) to the atmospheric environment appeared to be weak as a result of the offsetting effects of vapor pressure deficit (VPD) and photosynthetic photon flux (PPF) on g(s). In contrast, sap flow (F) followed these atmospheric parameters more precisely. Daily F depended chiefly on PPF sums, whereas on short time scales, VPD impeded transpiration when it exceeded a value of 1-1.2 kPa. This indicates an upper limit to transpiration in the investigated trees, even when soil water supply was not limiting. Mean g(s) was 165 mmol m(-2) s(-1) for the canopy trees and about 90 mmol m(-2) s(-1) for the understory species, but leaf-to-leaf as well as tree-to-tree variation was large. Considering whole-plant water use, variation in the daily course of F was more pronounced among trees differing in size and crown status than among species. Daily F increased sharply with stem diameter and tree height, and ranged between 80 and 120 kg day(-1) for dominant canopy trees, but was typically well below 10 kg day(-1) for intermediate and suppressed trees of the forest interior.  相似文献   

Transpiration and forest structure in relation to soil waterlogging in a Hawaiian montane cloud forest     

Santiago LS  Goldstein G  Meinzer FC  Fownes JH  Mueller-Dombois D 《Tree physiology》2000,20(10):673-681

Transpiration, leaf characteristics and forest structure in Metrosideros polymorpha Gaud. stands growing in East Maui, Hawaii were investigated to assess physiological limitations associated with flooding as a mechanism of reduced canopy leaf area in waterlogged sites. Whole-tree sap flow, stomatal conductance, microclimate, soil oxidation-reduction potential, stand basal area and leaf area index (LAI) were measured on moderately sloped, drained sites with closed canopies (90%) and on level, waterlogged sites with open canopies (50-60%). The LAI was measured with a new technique based on enlarged photographs of individual tree crowns and allometric relationships. Sap flow was scaled to the stand level by multiplying basal area-normalized sap flow by stand basal area. Level sites had lower soil redox potentials, lower mean stand basal area, lower LAI, and a higher degree of soil avoidance by roots than sloped sites. Foliar nutrients and leaf mass per area (LMA) in M. polymorpha were similar between level and sloped sites. Stomatal conductance was similar for M. polymorpha saplings on both sites, but decreased with increasing tree height (r(2) = 0.72; P < 0.001). Stand transpiration estimates ranged from 79 to 89% of potential evapotranspiration (PET) for sloped sites and from 28 to 51% of PET for level sites. Stand transpiration estimates were strongly correlated with LAI (r(2) = 0.96; P < 0.001). Whole-tree transpiration was lower at level sites with waterlogged soils, but was similar or higher for trees on level sites when normalized by leaf area. Trees on level sites had a smaller leaf area per stem diameter than trees on sloped sites, suggesting that soil oxygen deficiency may reduce leaf area. However, transpiration per unit leaf area did not vary substantially, so leaf-level physiological behavior was conserved, regardless of differences in tree leaf area.  相似文献