The European grape varieties that we have planted in our vineyard have perfect flowers, which means that they contain both the male and female reproductive organs and are therefore self-pollinating. They do not require bees to be pollinated.
Events that occur immediately post
capfall include the following:
1
Grape Flower Parts |
Pollination/Fertilization |
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- Immediately after capfall, the anthers split open and release their pollen grains
- The pollen grains adhere to substances secreted on the stigma
- Pollination is complete once the pollen has reached the stigma
- The pollen grains germinate and form pollen tubes
- The male gametes (sperm) travel through the pollen tube to the ovary
- Fertilization occurs when sperm reaches and impregnates the eggs within the embryo sacs
- Under normal field conditions, fertilization typically occurs two to three days after pollination
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References:
1. NiCk K. DokoozLian,
Grape Berry Growth and Development.
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