New Zealand Journal of Botany abstracts

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Ontogeny and morphology of ovarian and fruit hairs in kiwifruit

JULIE WHITE*

Division of Horticulture and Processing
DSIR, Private Bag, Auckland, New Zealand

Abstract 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 distri- bution 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 peri- clinal 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 begin- ning when four layers of cells have been produced (about 45-60 days from bud burst). These hairs, then, are technically emergences. New hairs con- tinue to form between developing hairs until epi- dermal 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 elec- tron microscopy.

Keywords Actinidia deliciosa var. deliciosa cv. Hayward; Actinidia chinensis; kiwifruit; trichomes; hairs; emergences; scanning electron microscopy; anatomy; Chinese gooseberry

Received 8 October 1985; accepted 20 December 1985
New Zealand Journal of Botany, 1986, Vol. 24: 403-414
0028-825X/86/2403-0403$2.50/0 © Crown copyright 1986

PDF file of entire paper: medium quality (2649K); (scanned from paper original: notes about this process)

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