Structure of the Vine

Chapter 5

Structure of the Cell

• Cell wall• Plasma Membrane• Cytoplasm• Protoplasm• Protoplast• Nucleus• Endoplasmic

Reticulum

• Ribosomes• Chlorophyll• Mitochondria• Golgi Body• Vacuoles• Cell Wall

Tissue

• Growth• Manufacturing & Storage• Protective• Support & Conducting

Growth

• Meristematic

Manufacturing & Storage

• Parenchyma

Protective

• Epidermis• Cork Cambium

Support & Conductive

• Xylem (tracheid cells and trachea)• Phloem (sieve tubes)

Parts of the Vine

• These parts may be classified into two groups by the work they perform:

• Those that carry on vegetative activity

• Those that produce seed or fruit

Root system

• 2-5 feet you will find the bulk of the roots.

• Lateral growth of roots is rarely restricted by natural conditions.

• Tens of thousands of rootlets are produced by a vine of moderate size.

• Absorption zone = is the region through which most of the water and mineral nutrients pass in entering the vine.

Shoot system

• Shoot• Growing tip• Buds• Leaf buds• Axillary buds• Leaf• Blade or lamina• Tendrils

• Lateral shoots• Arms• Trunk• Spur• Cane

Shoot

• Current years growth that arises from the bud.

Growing tip

• At the end of the shoot is the growing tip, 4-8 inches long, in which new cells are being formed by division and in which elongation is taking place.

Buds

• Normally develops at each node just above the leaf, in the leaf axil. A bud of a vine usually consists of three partially developed shoots, with rudimentary leaves or both rudimentary leaves and flower clusters.

Leaf buds

• Is a rudimentary sterile shoot. It will elongate into a shoot that bears only leaves and tendrils.

Axillary buds

• Usually describes the bud joint between the leaf stem and the shoot.

Leaf

• Is an expanded, lateral outgrowth of a shoot, arising at a node, and having a bud in its axil.

Blade or lamina

• Is the expanded or broad, flat part of the leaf.

Tendrils

• Give physical support to the primary shoots by coiling themselves around anything they come in contact with.

• **from the point of structure they are looked at as a cluster.**

Lateral shoots

• Form the canes.

Arms

• The permanent divisions of the vine, arising from or along the top of the trunk.

• They bear spurs or canes which are retained for next years production and shoots for this years production.

Trunk

• The permanent upward stem.

• It connects the roots to the arms.

Spur

• Short bearing unit retained during pruning.

Cane

• Long bearing unit retained during pruning.