See under sheet.
Leaves are the energy powerhouses of green plants and, along with the roots, the most important nutritional organs. On the Rebstock, they develop just like the Auge, Ranken, and Blütenstände (clusters or later grapes) as lateral outgrowths at the Nodien (knots) of young growing Triebe. While the shoot tip grows in length, new leaves continuously branch off, developing in a variety-specific manner. With the help of leaf pigments such as Chlorophyll, carotenoids, and flavonoids, sunlight energy is absorbed by the leaves and converted during photosynthesis using Kohlendioxid and Wasser into energy-rich Glucose (grape sugar) and Sauerstoff. The necessary carbon dioxide is absorbed from the air through the Stomata (pores), usually on the underside of the leaves. Through these small pores, the oxygen produced during the day escapes into the atmosphere.
1 = Basal leaves without Ranken, 2 = Weintraube, 3 = Tendril, 4 = Internodium, 5 = Triebspitze, 6 = Nodien with grapes or tendrils opposite each leaf, 7 = Node without grape or tendril.
Due to the water vapor saturation deficit of the air, every plant cell constantly loses water, which evaporates into the air. This complex process is referred to as transpiration (the evaporation of water from bare or free land or water surfaces is called evaporation). The constant loss is compensated by the supply of water through the roots from...
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