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tendrils

Designation (also claws, cranes, noodles, gusset, Zwinkel) for the attachment organs of the grapevine, This is one of creepers whose natural supports are other plants, slender emerging woody plants but also drooping climbing plants (lianas). The tendrils is a converted grape scaffold, the panicle of inflorescence (Bills or later grapes ). They are also closely related to the bills. This is shown by occurring hybrids, because tendrils of the vine can some blossoms and those of bills may have tendrils. At the node of Triebes they always stand that sheet across from. For the European varieties (species Vitis vinifera ), the tendril sequence is discontinuous (with spatial breaks). This means that in the nodal sequence on the shoot, two knot-bearing nodes are followed by a node without a tendril. They are forked two to four branches.

Shoot (drawing)

The curved bifurcated young tendrils lead one during growth nutation (circular motion). When in contact with a support, the tip usually winds in the same direction very quickly helically around the base and attaches the shoot to it. Later, the fork-free part of the vine branch pulls together in a counter-contracting two-piece coil spring, so that the shoot is used closer to the vine root. The vine melts afterwards, but remains elastic. For certain grape varieties, they are particularly strong and long-lasting, for example Chasselas. Muscat Ottonel and Riesling to. The sorts Green Valtellina. Sylvaner or Traminer however, have short or weakly developed tendrils. Often, the tendrils are only partially functional and fall without contacting a support after some time. See also below Rebstock,

tendrils

Graphics: taken from Bauer / Regner / Schildberger, viticulture,
ISBN: 978-3-70402284-4, Cadmos Verlag GmbH

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