BiP-mediated polar nuclei fusion is essential for the regulation of endosperm nuclei proliferation in Arabidopsis thaliana

机译：BiP介导的极性核融合对于拟南芥胚乳核增殖的调节至关重要

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Nuclear fusion is an essential process in the sexual reproduction of animals and plants. In flowering plants, nuclear fusion occurs three times: once during female gametogenesis, when the two polar nuclei fuse to produce the diploid central cell nucleus, and twice during double fertilization. The yeast Ig binding protein (BiP) is a molecular chaperone Hsp70 in the endoplasmic reticulum that regulates nuclear membrane fusion during mating. Here we report that in Arabidopsis thaliana, BiP is involved in the fusion of polar nuclei during female gametophyte development. BiP-deficient mature female gametophytes contain two unfused polar nuclei, in spite of their close contact. This indicates a surprising conservation of BiP function in nuclear fusion between plants and yeasts. We also found that endosperm nuclear division becomes aberrant after fertilization of the BiP-deficient female gametophytes with wild-type pollen. This is experimental evidence for the importance of fusion of the polar nuclei in the proliferation of endosperm nuclei.

机译：核聚变是动植物有性繁殖的重要过程。在开花植物中，核融合发生三次：一次在雌性配子发生期间，当两个极核融合以产生二倍体中央细胞核时，一次在两次受精过程中。酵母Ig结合蛋白（BiP）是内质网中的分子伴侣Hsp70，在交配过程中调节核膜融合。在这里，我们报道在拟南芥中，BiP在雌配子体发育过程中参与了极核的融合。缺乏BiP的成熟雌配子体尽管有紧密的接触，但仍含有两个未融合的极核。这表明BiP在植物和酵母之间的核融合中具有惊人的保守性。我们还发现，BiP缺陷型雌配子体与野生型花粉受精后，胚乳核分裂异常。这是极性核融合在胚乳核增殖中的重要性的实验证据。

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期刊名称 Proceedings of the National Academy of Sciences of the United States of America
作者
Daisuke Maruyama; Toshiya Endo; Shuh-ichi Nishikawa;
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年(卷),期 2010(107),4
年度 2010
页码 1684–1689
总页数 6
原文格式 PDF
正文语种
中图分类
关键词
endoplasmic reticulum molecular chaperone nuclear fusion fertilization female gametogenesis;

机译：内质网;分子伴侣;核融合;受精;雌配子发生;

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专利

1. BiP-mediated polar nuclei fusion is essential for the regulation of endosperm nuclei proliferation in Arabidopsis thaliana [J] . Daisuke Maruyama, Toshiya Endo, Shuh-ichi Nishikawa Proceedings of the National Academy of Sciences of the United States of America . 2010,第4期

机译：BiP介导的极性核融合对于拟南芥胚乳核增殖的调节至关重要
2. Nuclear fusions contribute to polyploidization of the gigantic nuclei in the chalazal endosperm of Arabidopsis [J] . Célia Baroux, Paul Fransz, Ueli Grossniklaus Planta . 2004,第1期

机译：核融合有助于拟南芥的带状胚乳中巨核的多倍化。
3. Fertilisation of polar nuclei and formation of early endosperms in Dendrobium catenatum: evidence for the second fertilisation in Orchidaceae [J] . Chen Yong, Zhang Chu, Wang Xiao-feng, Australian Journal of Botany . 2018,第4期

机译：石核施肥与胚乳皮下植入早期胚乳的形成：兰科果实二施肥的证据
4. Segmentation of Cell Nuclei in Arabidopsis Thaliana Roots [C] . Jonas De Vylder, Filip Rooms, Wilfried Philips International conference on image analysis and recognition;ICIAR 2010 . 2010

机译：拟南芥根中细胞核的分割
5. Function and regulation of INNER NO OUTER, a gene required for the polar development of ovules in Arabidopsis thaliana. [D] . Meister, Robert Joseph. 2002

机译：INNER NO OUTER（拟南芥胚珠极性发育所需的基因）的功能和调控。
6. Arabidopsis thaliana MIRO1 and MIRO2 GTPases Are Unequally Redundant in Pollen Tube Growth and Fusion of Polar Nuclei during Female Gametogenesis [O] . Christopher G. Sørmo, Tore Brembu, Per Winge, 2011

机译：拟南芥mIRO1和mIRO2 GTp酶并非均衡冗余花粉管生长和极核的融合女配子发生
7. BiP-mediated polar nuclei fusion is essential for the regulation of endosperm nuclei proliferation in Arabidopsis thaliana [O] . Maruyama, Daisuke, Endo, Toshiya, Nishikawa, Shuh-ichi 2010

机译：BiP介导的极性核融合对于拟南芥胚乳核增殖的调节至关重要

BiP-mediated polar nuclei fusion is essential for the regulation of endosperm nuclei proliferation in Arabidopsis thaliana

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