Shoot nodes of <i>Vitis labruscana</i> Bailey cv. Concord
DOI:
https://doi.org/10.5073/vitis.1978.17.329-334Abstract
In Vitis labruscana BAILEY cv. Concord the primary vascular system of the node of a shoot with 2 flat leaves, about a month before bloom, comprises
- the cauline vascular cylinder of the shoot;
- lateral and primary bud traces flanking a common gap (parenchyma) in the shoot vascular system;
- 5 leaf traces which diverge from the cauline vascular tissue at separate gaps.
Procambium on the sidas of the bud gaps . adds ta the parenchymatous and vascular tissues of the bud axes and ta the radial expansion of the node. The ribbed pith is interrupted by an non-ribbed parenchymatous diaphragm which is continuous with the bud and leaf gaps.
Noeuds des rameaux verts chez Vitis labruscana Bailey cv. Concord
Les noeuds des rameaux verts de Vitis labruscana BAILEY cv. Concord avec 2 feuilles plates possèdent, environ 1 mois avant la floraison, un système vasculaire composé:
- du cylindre vasculaire caulinaire du rameau vert;
- des traces du promptbourgeon et du bourgeon primaire bordant une fenêtre commune (parenchyme) dans le système vasculaire du rameau vert;
- de 5 traces foliaires et leurs fenêtres respectives.
Le procambium sur les parois des fenêtres des bourgeons s'ajoute aux tissus parenchymateux et vasculaires des axes des bourgeons et à l'expansion radiale des noeuds. La moelle à nervures est interrompue par un diaphragme parenchymateux sans nervures; ce diaphragme est lié avec les fenêtres des bourgeons et des feuilles.
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