how many different grapevine species are found around the world?

what is the main eurasian species?

what are the main north american species?

over 60

vitis vinifera

vitis riparia, viis rupestris, vitis berlandieri

• main eurasian species
• produces nealy all wine making grapes
• btwn 5k-10k varieties

are north american grapevine species used for winemaking grapes?

how do they differ from vitis vinifera?

how are they used in terms of winemaking?

1.  no
2. they are resistant to phylloxera (attacks roots)
3. they are used to provide root systems which v.v. are grafted

• shoots
• leaves
• tendrills
• flowers & berries
• buds
• one year old wood
• permanent wood
• the roots

• new growth produced by vines each year
• have regularly spaced bumps called nodes where leaf stem joins shoots

• responsible for photosynthesis

• process by which plants use chlorophyll & sunlight to convert water & CO₂ into glucose & oxygen

• vine can combine small glucose molecules into larger carbohydrates
• energy stored in glucose can be released it when plant needs it
• conentrated in fruit> attracts animals> spreads seeds

• part of a vine that grips a supporting structure to keep the shoot upright

what ia the function of flowers?

what do flowers produce?

• flowers are the vines reporoductive organs
• vines flowers are hermaphordite

• flowers produce berries
• flowers are grouped into inflorescences, which will become a bunch of grapes

• 'embryonic shoots'