10 Result(s)

Article

Differentiation and structural decline in the leaves and bark of birch (Betula pendula) under low ozone concentrations

Leaf and bark structure of a birch clone (Betula pendula Roth) continuously exposed to charcoal-filtered air or charcoal-filtered air plus ozone (0.05, 0.075, 0.1 μl 1^-1) was investigated throughout one growing s...

Madeleine S. Günthardt-Goerg, Rainer Matyssek, Christoph Scheidegger… in Trees (1993)

Article

Seasonal growth, δ¹³C in leaves and stem, and phloem structure of birch (Betula pendula) under low ozone concentrations

The growth of potted birch cuttings (one clone of Betula pendula) was studied under low O₃ concentrations (0, 0.050, 0.075, 0.100 μl l^-1) throughout an entire growing season. With increasing O₃ dose, 20–50% of al...

Rainer Matyssek, Madeleine S. Günthardt-Goerg, Matthias Saurer, Theodor Keller in Trees (1992)

Article

Impairment of gas exchange and structure in birch leaves (Betula pendula) caused by low ozone concentrations

Injury caused by low O₃ concentrations (0, 0.05, 0.075, 0.1 μl 1^-1) was analyzed in the epidermis and mesophyll of fully developed birch leaves by gas exchange experiments and low-temperature SEM: (I) after leaf ...

Rainer Matyssek, Madeleine S. Günthardt-Goerg, Theodor Keller… in Trees (1991)

Chapter

Air Pollutant Deposition and Effects on Plants

Plants are often more sensitive to air pollutants than man. They may accumulate air pollutants in parts of their shoots without showing any injury at all. This has the advantage of making pollutants accessible...

Theodor Keller in Effects of Accumulation of Air Pollutants in Forest Ecosystems (1983)

Article

Food relations of woody plants

Theodore T. Kozlowski, Theodor Keller in The Botanical Review (1966)

Article

The effect of iron chelate fertilization of poplar upon CO₂-uptake, leaf size, and content of leaf pigments and iron

Potted poplars (strainsmarilandica, serotina andFlachslanden ofPopulus euramericana) which developed iron-deficiency symptoms (chlorosis of upper leaves, winter die-back of leader, flushing of lateral buds) were ...

Theodor Keller, Werner Koch in Plant and Soil (1964)