e-journal

Green love talks; cell–cell communication during double fertilization in flowering plants

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Abstract.
Background:
Flowering plant seeds originate from a unique double-fertilization event, which involves two
sperm cells and two female gametes, the egg cell and the central cell. For many years our
knowledge of mechanisms involved in angiosperm fertilization remained minimal. It was
obvious that several signals were required to explain how the male gametes are delivered
inside the maternal reproductive tissues to the two female gametes but their molecular
nature remained unknown. The difficulties in imaging the double-fertilization process prevented
the identification of the mode of sperm cell delivery. It was believed that the two
sperm cells were not functionally equivalent.

Scope:
We review recent studies that have significantly improved our understanding of the early
steps of double fertilization. The attractants of the pollen tube have been identified as
small proteins produced by the synergid cells that surround the egg cell. Genetic studies
have identified the signalling pathways required for the release of male gametes from the
pollen tube. High-resolution imaging of the trajectory of the two male gametes showed
that their transport does not involve the synergid cells directly and that isomorphic male
gametes are functionally equivalent. We also outline major outstanding issues in the field
concerned with the barrier against polyspermy, gamete recognition and mechanisms that
prevent interspecies crosses.

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Ketersediaan

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Informasi Detail

Judul Seri

AoB PLANTS

No. Panggil

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Penerbit

Oxford : Oxford University Press., 2011

Deskripsi Fisik

AoB PLANTS 2011 plr015, doi:10.1093/aobpla/plr015

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2011 plr015

Subjek

PEMULIAAN TANAMAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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