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In flowering plants, guidance of the pollen tube to the embryo sac
(the haploid female gametophyte) is critical for successfulfertilization. The target embryo sac may attract the pollen tubeas the
final step of guidance in the pistil. We show by lasercell ablation
that two synergid cells adjacent to the egg cellattract the pollen
tube. A single synergid cell was sufficientto generate an attraction
signal, and two cells enhanced it. Afterfertilization, the embryo sac
no longer attracts the pollen tube,despite the persistence of one
synergid cell. This cessation ofattraction might be involved in
blocking polyspermy.
1 Department of Biological Sciences, Graduate
School of Science, University of Tokyo, Hongo, Tokyo 113-0033, Japan.
2 Department of Biology, Ochanomizu University,
Tokyo 112-8610, Japan.
*
To whom correspondence should be addressed. E-mail:
higashi{at}biol.s.u-tokyo.ac.jp
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|Abstract »|Full Text »|PDF »
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PLANT CELL
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PLANT CELL
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PLANT CELL
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PNAS
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The Arabidopsis mutant feronia disrupts the female gametophytic control of pollen tube reception.
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Development
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Mitochondrial GFA2 Is Required for Synergid Cell Death in Arabidopsis.
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PLANT CELL
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