In:
HortScience, American Society for Horticultural Science, Vol. 22, No. 2 ( 1987-04), p. 201-205
Abstract:
The pistillate flower of walnut is a complex structure (10, 13, 14) and is referred to as a pistil for simplicity. Pistils emerge terminally on shoot or spurs after different degrees of vegetative extension from mixed buds (9, 14). Such growth can range from essentially nil to about 1 m. Pistils are borne on a short peduncle (Fig. 1). Two pistils per peduncle are most common, but one or three, or (rarely) more, can occur. Flowers are wind-pollinated and all cultivars are considered to be cross- and self-fruitful (9, 14). Pistils become receptive very shortly after emergence from the shoot apex when the two stigma lobes begin to separate. Fertilization of ovules is necessary for nut development to maturity, but pollination and fertilization are not required for early growth of the ovary (14). Ovaries of nonpollinated flowers will enlarge at rates similar to those of fertilized ones for several weeks before abscising, when about 1 to 2 cm in diameter.
Type of Medium:
Online Resource
ISSN:
0018-5345
,
2327-9834
DOI:
10.21273/HORTSCI.22.2.201
Language:
Unknown
Publisher:
American Society for Horticultural Science
Publication Date:
1987
detail.hit.zdb_id:
2040198-X
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