You are using an old browser that may not function as expected. For a better, safer browsing experience, please upgrade your browser.

Log in Become a Member


Leaves are the energy power plants of green plants and, next to the roots, the most important nutritional organs. In the vine, they form like the eyes (summer and winter eyes), tendrils and inflorescences (clusters or later grapes) as lateral outgrowths on the nodes of young growing shoots. As the shoot tip grows in length, new leaves continuously branch off, which develop in a variety-specific manner. With the help of leaf pigments such as chlorophylls, carotenoids and flavonoids, the light energy from the sun is absorbed by the leaves and converted into energy-rich glucose (grape sugar) and oxygen during photosynthesis using carbon dioxide and water. The carbon dioxide needed for this is absorbed from the air through the stomata (stomata ) mostly on the undersides of the leaves. The oxygen produced during the day escapes to the outside through these small stomata.

Voices of our members

Dr. Christa Hanten

For my many years of work as an editor with a wine and culinary focus, I always like to inform myself about special questions at Wine lexicon. Spontaneous reading and following links often leads to exciting discoveries in the wide world of wine.

Dr. Christa Hanten
Fachjournalistin, Lektorin und Verkosterin, Wien

The world's largest Lexicon of wine terms.

25,893 Keywords · 46,913 Synonyms · 5,325 Translations · 31,225 Pronunciations · 179,383 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon