The Vine Flashcards
Why do most grape growers now use cuttings instead of layering?
Due to the risk of phylloxera.
Describe Buds
These form in the joint between the leaf and the shoot. Once formed, they mature inside their casing during the growing season so that, by the end of the year, each bud contains in miniature all the structures that will become a new shoot.
What is cross fertilization?
This is when pollen from the male part of the flower of the vine is transferred to the female part of the flower of another vine and fertilisation occurs.
What are the two most common ways of creating a new grape variety?
Crossings
Hybrids
Describe flowers and berries
Flowers are the vines reproductive organs that have both male and female parts. Each flower that is successfully pollinated will become a berry, then a bunch of grapes.
What is the function of the roots?
To absorb water and nutrients from the soil, anchor the vine, and store carbohydrates to allow the vine to survive the winter.
What is glucose in relation to a grapevine
Glucose is a sugar that is used to support vine growth and make ripe grapes taste sweet.
Describe leaves
These are the plants engine. They are principally responsible for photosynthesis.
List the ‘Green Parts of the Vine’
Shoot Buds Tendrils Flowers and Berries Leaves
Vine variety and Grape variety are synonyms. What is another common term?
Cultivar
What is permanent wood?
The wood that is more than one year old. The permanent wood is made up of the trunk and, when present, the arms of the vine.
Why would a grape grower cross fertilize?
To produce grape varieties that are better able to thrive in certain climates and soil conditions, as well as varieties with improved disease resistance, and those able to deliver a higher quality or quantity of grapes.
What is one year old wood?
Shoots turn woody during the winter after they have grown. The following Spring they become one yr old wood and the buds that formed on them the previous yr grow into shoots.
Describe a Shoot
The principal structure of new growth. Along the length of each shoot there are leaves, buds, tendrils, and flowers or berries.
Name two methods of propagating vines.
Cutting
Layering