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PMID: 2571069 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

Molecular and genetic analysis of an embryonic gene, DC 8, from Daucus carota L.

Molecular & general genetics : MGG ·Vol. 218 ·No. 1 ·1989-07-00 ·Pages 143-51

Franz G, Hatzopoulos P, Jones TJ, Krauss M, Sung ZR

Abstract

To understand the morphogenetic and physiological processes occurring during plant embryogenesis, we isolated cDNA clones homologous to genes preferentially expressed during somatic embryogenesis. One of these cDNA clones detected an embryo-specific mRNA species with a corresponding protein of 66 kDa. The expression pattern of the mRNA is similar between somatic and zygotic embryos of carrots. To characterize the gene encoding this mRNA, we isolated the corresponding genomic clones. Molecular analysis of the DNA from several haploid and diploid carrots showed that the mRNA was encoded by a single copy gene, named DC 8. DNA sequence analysis showed that the gene consisted of three exons and coded for a hydrophilic protein with a central region composed of 17 repeats. At the NH2-terminus no typical signal sequence was found. Immunocytochemical analysis localized the protein primarily in the vacuoles and protein bodies of zygotic embryos; the cytoplasm showed some antibody staining. The protein was also found in cell walls of endosperm tissue. The amount of DC 8 protein was too low for it to be categorized as a seed storage protein; its role in embryo-genesis remains to be determined.

MeSH Terms
Alleles Amino Acid Sequence Base Sequence Blotting, Northern Blotting, Southern Cloning, Molecular Exons Genes Immunohistochemistry Molecular Sequence Data Plant Proteins/analysis,genetics Plants/embryology,genetics Polymorphism, Restriction Fragment Length Protein Biosynthesis Restriction Mapping Sequence Homology, Nucleic Acid
Chemicals
Plant Proteins DC8 protein, Daucus carota
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Franz G
Department of Genetics, University of California, Berkeley 94720.
Hatzopoulos P
Jones T J
Krauss M
Sung Z R
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Article Info
Journal
Molecular & general genetics : MGG
Abbr.
Mol Gen Genet
ISSN
0026-8925
DOI
10.1007/BF00330577
Published
1989-07-00
Pages
143-51
Language
English
Region
Germany
NLM ID
0125036
Subset
IM
External Links
PubMed source DOI: 10.1007/BF00330577
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