A citrus forum member described the method:
"seeds are washed, seed coat is removed, longitudinal incision is made by the scalpel on cotyledons to insure the contact with rootstock. The rest resembles bud grafting."
Technical Abstract:
"We have developed a technique for grafting citrus seeds to a citrus stock plant that allows the apparent development of a successful vascular connection between seed and stock plant and germination and development of a seedling which appears indistinguishable from seedlings germinated from seeds planted in soil. Cotyledons of grafted seeds turned green upon exposure to light. Seedling radicles emerged and grew downward, appressed to the trunk of the stock. The embryo emerged from between the cotyledons and successive pairs of true leaves emerged and expanded in a normal fashion. Possible applications of this novel seed grafting technology for breeding citrus and other fruit crops is discussed."