Document Detail

Maternal control of male-gamete delivery in Arabidopsis involves a putative GPI-anchored protein encoded by the LORELEI gene.
MedLine Citation:
PMID:  19028964     Owner:  NLM     Status:  MEDLINE    
In Angiosperms, the male gametes are delivered to the female gametes through the maternal reproductive tissue by the pollen tube. Upon arrival, the pollen tube releases the two sperm cells, permitting double fertilization to take place. Although the critical role of the female gametophyte in pollen tube reception has been demonstrated, the underlying mechanisms remain poorly understood. Here, we describe lorelei, an Arabidopsis thaliana mutant impaired in sperm cell release, reminiscent of the feronia/sirène mutant. Pollen tubes reaching lorelei embryo sacs frequently do not rupture but continue to grow in the embryo sac. Furthermore, lorelei embryo sacs continue to attract additional pollen tubes after arrival of the initial pollen tube. The LORELEI gene is expressed in the synergid cells prior to fertilization and encodes a small plant-specific putative glucosylphosphatidylinositol-anchored protein (GAP). These results provide support for the concept of signaling mechanisms at the synergid cell membrane by which the female gametophyte recognizes the arrival of a compatible pollen tube and promotes sperm release. Although GAPs have previously been shown to play critical roles in initiation of fertilization in mammals, flowering plants appear to have independently evolved reproductive mechanisms that use the unique features of these proteins within a similar biological context.
Arnaud Capron; Mathieu Gourgues; Lissiene S Neiva; Jean-Emmanuel Faure; Frederic Berger; Gabriela Pagnussat; Anjali Krishnan; Cesar Alvarez-Mejia; Jean-Philippe Vielle-Calzada; Yuh-Ru Lee; Bo Liu; Venkatesan Sundaresan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-11-21
Journal Detail:
Title:  The Plant cell     Volume:  20     ISSN:  1040-4651     ISO Abbreviation:  Plant Cell     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2009-01-01     Completed Date:  2009-02-24     Revised Date:  2013-06-04    
Medline Journal Info:
Nlm Unique ID:  9208688     Medline TA:  Plant Cell     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3038-49     Citation Subset:  IM    
Department of Plant Biology, University of California, Davis, California 95616, USA.
Data Bank Information
Bank Name/Acc. No.:
GENBANK/AC174340;  BT001157;  BT011635;  BT012124;  CU207236;  DQ244578;  DQ245780;  EU727071; RefSeq/NM_001054497;  NM_001069341;  XM_001780105
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MeSH Terms
Amino Acid Sequence
Arabidopsis / embryology,  genetics*
Arabidopsis Proteins / genetics,  metabolism*
Chromosome Mapping
DNA, Plant / genetics
Fertilization / genetics
Germ Cells / growth & development*
Glycosylphosphatidylinositols / metabolism
Molecular Sequence Data
Pollen Tube / genetics,  growth & development*
Reg. No./Substance:
0/Arabidopsis Proteins; 0/DNA, Plant; 0/Glycosylphosphatidylinositols

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