Anther- and Pollen-Specific Gene Expression in Sunflower
Among the living organisms plants have a unique life cycle characterized by an alternation of diploid and haploid generations. The role of the diploid sporophytic generation is to produce, following meiosis, haploid spores that develop into haploid male or female gametophytes. Specific cells of the gametophytes then differentiate into male or female gametes which fuse to yield a diploid embryo that finally grows into mature sporophyte. In flowering plants, the diploid, sporophytic generation is the dominant phase, whereas the haploid gametophyte is microscopic and consists of a very reduced number of cells: two or three in the case of the male gametophyte and seven (one of which being binucleate) in the case of the female gametophyte. The haploid male gametophytes, or pollen grains, are produced in the anthers, while the female gametophytes, or embryo sacs, develop in the ovaries (anthers and ovaries are diploid, sporophytic structures). In higher plants, the development of the male and female gametophytes is therefore closely associated with the development of sporophytic tissues. This contrasts with the situation in lower plants where the gametophytes can develop and live as independent free organisms.
KeywordsPollen Tube Female Gametophyte Genomic Clone Helianthus Annuus Sporophytic Tissue
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Baltz, R., C. Domon, D.T.N. Pillay, and A. Steinmetz. 1992. Isolation and characterization of a pollen-specific gene from sunflower encoding a zinc finger protein. Plant J.
Baltz, R., J. L. Evrard, C. Domon, and A. Steinmetz. (1992) A LIM motif is present in a pollen-specific protein. Plant cell 4:1465–1466.PubMedCrossRefGoogle Scholar
Birkenmeyer, E. H. and J. I. Gordon. 1986. Proc. Natl. Acad. Sci. USA
, 83:2516–2520.CrossRefGoogle Scholar
Breathnach, R. and P. Chambon. 1981. Organization and expression of eukaryotic split genes coding for proteins. Annu. Rev. Biochem.
Domon, C., J. L. Evrard, F. Herdenberger, D.T.N. Pillay, and A. Steinmetz. 1990. Nucleotide sequence of two anther-specific cDNAs from sunflower (Helianthus annuus
L). Plant Mol. Biol.
Domon, C., J. L. Evrard, D.T.N. Pillay, and A. Steinmetz. 1991. A 2.6 kb intron separates the signal peptide coding sequence of an anther-specific protein from the rest of the gene in sunflower. Mol. Gen. Genet.
Evrard, J. L., C. Jako, A. Saint-Guily, J. H. Weil, and M. Kuntz. 1991. Anther-specific, developmentally regulated expression of genes encoding a new class of proline-rich proteins in sunflower. Plant Mol. Biol.
Freydt, G., S. K. Kim, and H. R. Horwitz. 1990. Novel cysteine-rich motif and homeodo-main in the product of the Caenorhabditis elegans
cell lineage gene lin-11. Nature
Herdenberger, F., J. L. Evrard, M. Kuntz, L. H. Tessier, A. Klein, A. Steinmetz, and D.T.N. Pillay. Isolation of flower-specific cDNA clones from sunflower (Helianthus annuus
L). Plant Sci.
Liebhaber, S. A., J. G. Emery, M. Urbanek, X. Wang, and N. E. Cooke. 1990. Characterization of a human cDNA encoding a widely expressed and highly conserved cysteine-rich protein with an unusual zinc-finger motif. Nucleic Acids Res.
Kamalay, J. C. and R. B. Goldberg. 1980. Regulation of structural gene expression in tobacco. Cell
Karlsson, O., S. Thor, T. Norberg, H. Ohlsson, and T. Edlund. 1990. Insulin gene enhancer binding protein Is 1–1 is a member of a novel class of proteins containing both a homeo- and Cys-His domain. Nature
Kyte, J. and R. F. Doolittle. 1982. A simple method for displaying the hydropathic character of a protein. J. Mol. Biol.
Mascarenhas, J. 1990. Gene activity during pollen development. Annu. Rev. Plant Physiol Plant Mol. Biol
Way, J. C. and M. Chalfie. 1988. mec-3
, a homeobox-containing gene that specifies differentiation of the touch receptor neutrons in C. elegans. Cell