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Published on May 2, 2002; 10.1104/pp.004010

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Received February 26, 2002
Returned for revision March 10, 2002
Accepted March 19, 2002

RASPBERRY3 Gene Encodes a Novel Protein Important for Embryo Development

Nestor R. Apuya , Ramin Yadegari , Robert L. Fischer , John H. Harada , and Robert B. Goldberg *

Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, California 90095--1606 (N.R.A., R.Y., R.B.G.); Department of Plant and Microbial Biology, University of California, Berkeley, California 94720 (R.L.F.); and Section of Plant Biology, Division of Biological Sciences, University of California, Davis, California 95616 (J.H.H.)

* Corresponding author; email: bobg{at}ucla.edu.

We identified a new gene that is interrupted by T-DNA in an Arabidopsis embryo mutant called raspberry3. raspberry3 has "raspberry-like" cellular protuberances with an enlarged suspensor characteristic of other raspberry embryo mutants, and is arrested morphologically at the globular stage of embryo development. The predicted RASPBERRY3 protein has domains found in proteins present in prokaryotes and algae chloroplasts. Computer prediction analysis suggests that the RASPBERRY3protein may be localized in the chloroplast. Complementation analysis supports the possibility that the RASPBERRY3 protein may be involved in chloroplast development. Our experiments demonstrate the important role of the chloroplast, directly or indirectly, in embryo morphogenesis and development.




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