The nitrate and ammonium nitrate supply have a major influence on the response of photosynthesis, carbon metabolism, nitrogen metabolism and growth to elevated carbon dioxide in tobacco (1999) Sonnewald U Other publication type Application of transgenic plants in understanding responses to atmospheric change (1999) Sonnewald U Journal article Enhanced carbon dioxide leads to a modified diurnal rhythm of nitrate reductase activity in older plants, and a large stimulation of nitrate reductase activity and higher levels of amino acids in young tobacco plants (1998) Sonnewald U Journal article Sucrose metabolism in cold-stored potato tubers with decreased expression of sucrose phosphate synthase (1998) Sonnewald U Journal article Potato plants contain multiple forms of sucrose phosphate synthase, which differ in their tissue distributions, their levels during development, and their responses to low temperature (1997) Sonnewald U Journal article Companion cell-specific inhibition of the potato sucrose transporter SUT1 (1996) Sonnewald U Journal article Phloem-specific expression of pyrophosphatase inhibits long-distance transport of carbohydrates and amino acids in tobacco plants (1996) Sonnewald U Journal article MANIPULATION OF SINK-SOURCE RELATIONS IN TRANSGENIC PLANTS (1994) Sonnewald U Other publication type Cloning and characterization of a xA/ound-specific hydroxyproline-rich glycoprotein in Phaseolus vulgaris (1990) Sauer N, Corbin DR, Keller B, Lamb CJ Journal article, Original article