Document Detail

Positional relationship between the gamete fusion site and the first division plane in the rice zygote.
MedLine Citation:
PMID:  20462944     Owner:  NLM     Status:  MEDLINE    
In angiosperms, a zygote generally divides into a two-celled proembryo consisting of an apical and a basal cell that possess different cell fates. This first division of the zygote is a putative step in the formation of the apical-basal axis of the proembryo. The gamete fusion activates the egg, and the gamete fusion site on the zygote has been reported to provide a possible cue for subsequent zygotic development and/or embryonic patterning in animals and plants. In this study, the gamete fusion site on the rice zygote was labelled by in vitro fertilization of a rice egg cell with a fluorescence-stained sperm cell. The positional relationship between the gamete fusion site and the division plane formed by zygotic cleavage was monitored using a fixed culture of the fusion site-labelled zygote until the two-celled proembryo stage. The results indicate that gamete fusion sites exist on two-celled proembryos with no relation to the position of the first division plane, and that the gamete fusion site on the rice zygote does not function as a determinant for positioning the zygote division plane.
Keisuke Nakajima; Takao Uchiumi; Takashi Okamoto
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-12
Journal Detail:
Title:  Journal of experimental botany     Volume:  61     ISSN:  1460-2431     ISO Abbreviation:  J. Exp. Bot.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-06-25     Completed Date:  2010-09-20     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  9882906     Medline TA:  J Exp Bot     Country:  England    
Other Details:
Languages:  eng     Pagination:  3101-5     Citation Subset:  IM    
Department of Biological Sciences, Tokyo Metropolitan University, Minami-osawa Hachioji, Tokyo 192-0397, Japan.
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MeSH Terms
Cell Division
Cell Fusion
Germ Cells, Plant / cytology*
Oryza sativa / cytology*
Zygote / cytology*

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