Abstract:
:Cell-cell communication and interaction is critical during fertilization and triggers free cytosolic calcium ([Ca2+]cyto) as a key signal for egg activation and a polyspermy block in animal oocytes. Fertilization in flowering plants is more complex, involving interaction of a pollen tube with egg adjoining synergid cells, culminating in release of two sperm cells and their fusion with the egg and central cell, respectively. Here, we report the occurrence and role of [Ca2+]cyto signals during the entire double fertilization process in Arabidopsis. [Ca2+]cyto oscillations are initiated in synergid cells after physical contact with the pollen tube apex. In egg and central cells, a short [Ca2+]cyto transient is associated with pollen tube burst and sperm cell arrival. A second extended [Ca2+]cyto transient solely in the egg cell is correlated with successful fertilization. Thus, each female cell type involved in double fertilization displays a characteristic [Ca2+]cyto signature differing by timing and behaviour from [Ca2+]cyto waves reported in mammals.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Denninger P,Bleckmann A,Lausser A,Vogler F,Ott T,Ehrhardt DW,Frommer WB,Sprunck S,Dresselhaus T,Grossmann Gdoi
10.1038/ncomms5645subject
Has Abstractpub_date
2014-08-22 00:00:00pages
4645issn
2041-1723pii
ncomms5645journal_volume
5pub_type
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