The initiation and development of ovarian and fruit hairs in Actinidia deliciosa (A. Chev.) C. F. Liang et A. R. Ferguson var. deliciosa cv. Hayward was studied using light and scanning electron microscopy. The morphology and distribution of large and small hairs are described. Hairs are initiated from one epidermal cell at an early stage of ovary development at around 21 days after vegetative bud burst. They develop through periclinal and anticlinal cell division into a tapering multiseriate structure, approximately 2.5 mm in length, which terminates in one very long apical cell approximately 1 mm in length. Sub-epidermal tissue contributes to the multiseriate base beginning when four layers of cells have been produced (about 45-60 days from bud burst). These hairs, then, are technically emergences. New hairs continue to form between developing hairs until epidermal cell division ceases at around 107-114 days after bud burst. The small hairs present on mature fruit may be an arrested early stage of development of large hairs. No stomata were observed on the ovary or fruit surface using light or scanning electron microscopy.
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