Parthenocarpy(单性结实) The formation of fruits without fertilization and seed production Examples: seedless grapes ,, nave oranges Two types of parthenocarpy 1. Caused by the flow of plant hormones to the ovary from the parent plant 2. Achieved commercially for some species by spraying IAA) Thompson seedless grape▪ The formation of fruits without fertilization and seed production ▪ Examples: seedless grapes,, navel oranges ▪ Two types of parthenocarpy 1.Caused by the flow of plant hormones to the ovary from the parent plant 2. Achieved commercially for some species by spraying IAA) Thompson seedless grape Parthenocarpy （单性结实）