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Journal of Plant Research

, Volume 115, Issue 2, pp 0149–0160 | Cite as

The synergid cell: attractor and acceptor of the pollen tube for double fertilization

  • T. Higashiyama
INVITED ARTICLE

Abstract

In flowering plants, the egg cell is generally accompanied by two symmetrical cells, called synergid cells. As early as the 1870s, synergid cells were distinguished from egg cells and cooperation between synergid and egg cells was proposed; the term "synergid" is derived from the Greek "synergos," which means "working together." The accumulation of morphological and genetic data, and, more recently, the in vitro physiological analysis of the fertilization system of Torenia fournieri, have revealed that synergid cells work together with egg and central cells to accomplish double fertilization. This cooperation is of crucial importance in the attraction and acceptance of the pollen tube. In this review article, I focus on the physiological function and behavior of the synergid cell during the fertilization process.

Key words Double fertilization Embryo sac Pollen tube Synergid cell Torenia 

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Copyright information

© The Botanical Society of Japan and Springer-Verlag Tokyo 2002

Authors and Affiliations

  • T. Higashiyama
    • 1
  1. 1.Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo, Tokyo 113-0033, Japan e-mail: higashi@biol.s.u-tokyo.ac.jpJP

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