ISSN:
1432-2145
Keywords:
Key words Cupressus dupreziana
;
DNA content
;
Endosperm
;
Reproduction
;
Flow cytometry
;
Gymnosperm
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Nuclear DNA content of embryo and endosperm from mature and immature Cupressus dupreziana A. Camus seeds was estimated using laser flow cytometry. Relative DNA content of endosperm nuclei corresponded to four ploidy levels: 2C, 4C, 6C and 8C. The embryo nuclei invariably exhibited a diploid pattern. In all endosperm tissue analyzed no haploid nucleus was found. This is problematic since, in gymnosperms, endosperm and female gametes originate from one functional haploid megaspore produced by meiosis. The possible origin and derivation of C. dupreziana endosperm are discussed in light of previous results concerning the two other Mediterranean cypresses, C. sempervirens and C. atlantica.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004970050132
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