Apomixis and Polyembryony in Pachira oleaginea (Bombacaceae)
1960; Wiley; Volume: 47; Issue: 4 Linguagem: Inglês
10.2307/2439610
ISSN1537-2197
Autores Tópico(s)Geotechnical and construction materials studies
ResumoAmerican Journal of BotanyVolume 47, Issue 4 p. 296-302 Article APOMIXIS AND POLYEMBRYONY IN PACHIRA OLEAGINEA (BOMBACACEAE) H. G. Baker, H. G. Baker Department of Botany, University of California, Berkeley, CaliforniaSearch for more papers by this author H. G. Baker, H. G. Baker Department of Botany, University of California, Berkeley, CaliforniaSearch for more papers by this author First published: 01 April 1960 https://doi.org/10.1002/j.1537-2197.1960.tb07128.xCitations: 18AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Baker, H. G. (U. California, Berkeley.) Apomixis and polyembryony in Pachira oleaginea (Bombacaceae). Amer. Jour. Bot. 47(4): 296—302. Illus. 1960.–Trees identified as Pachira oleaginea Decne. are now widely cultivated in tropical and subtropical Africa. Specimens from Achimota, Ghana, are shown to contain 1—5 embryos in a single seed. The flowers, which open at night, are self-compatible but need to be pollinated for seed-setting to occur. Maturation of the fruit takes about 2 mo. but the seeds germinate soon after shedding. One embryo in each seed is usually much the largest and the only one to become established as a seedling. There is no relation between seed-size and numbers of embryos contained. Histological and cytogical studies show that adventitious embryony is responsible for the excess embryos following the formation of a normal sexually produced embryo (2n=72) and endosperm (3n=108). Adventitious embryos arise from single cells in the nucellus in the vicinity of the micropyle and appear to develop faster than the sexually produced embryo with consequent frequent apomictic reproduction. This is the first report of apomixis in the Malvales, which may have important practical consequences as P. oleaginea is a potential economic plant and may fruit only 3 yr. after sowing, rendering seed-propagation feasible. Citing Literature Volume47, Issue4April 1960Pages 296-302 RelatedInformation
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