Designation (also claws, nails, noodles, gussets, angles) for the fastening elements of the grapevine, This is a creeping plant, the natural supports of which are other plants, slender aspiring shrubs but also hanging climbing plants (lianas). The tendrils are a converted grape stem frame, the panicle of inflorescence (Appearances or later grapes ). They are also closely related to the events. This is shown by the mixed forms that occur, because the branches of the tendril can do some blossoms and those of appearances can have tendrils. At the knot of the Triebes they always stand up to that sheet across from. For European varieties (species Vitis vinifera ) the tendril sequence is discontinuous (with spatial interruptions). This means that a knot without tendril follows in the knot sequence on the shoot after two tendril-bearing knots. They are forked with two to four arms.
The curved fork ends of the young tendrils lead one during growth nutation (circular motion). When it comes into contact with a support, the tip usually winds very helically around the surface in the same direction and attaches the shoot to it. Later the fork-free part of the vine branch contracts into a contra-contractioning two-part coil spring, so that the shoot is pulled closer to the vine base. The tendril then wooded, but remains elastic. With certain grape varieties, they are particularly strong and long, for example Chasselas. Muscat Ottonel and Riesling to. The sorts Green Valtellina. Sylvaner or Traminer in contrast, have short or poorly developed tendrils. The tendrils are often of limited functionality and fall off after a while without contacting a support. See also under Rebstock,
Graphics: taken from Bauer / Regner / Schildberger, viticulture,
ISBN: 978-3-70402284-4, Cadmos Verlag GmbH