The central cell plays a critical role in pollen tube guidance in Arabidopsis

被引：151

作者：

Chen, Yan-Hong ^{[1
,2
]}

Li, Hong-Ju ^{[1
,2
]}

Shi, Dong-Qiao ^{[1
]}

Yuan, Li ^{[1
,2
]}

Liu, Jie

Sreenivasan, Rajini ^{[3
]}

Baskar, Ramarmurthy ^{[4
,5
,6
]}

Grossniklaus, Ueli ^{[4
,5
,6
]}

Yang, Wei-Cai ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Genet & Dev Biol, Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

[3] Temasek Life Sci Lab, Singapore 117604, Singapore

[4] Univ Zurich, Inst Plant Biol, CH-8008 Zurich, Switzerland

[5] Univ Zurich, Zurich Basel Plant Sci Ctr, CH-8008 Zurich, Switzerland

[6] Cold Spring Harbor Lab, Cold Spring Harbor, NY 11724 USA

来源：

PLANT CELL | 2007年 / 19卷 / 11期

关键词：

D O I：

10.1105/tpc.107.053967

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The sperm cell of flowering plants cannot migrate unaided and must be transported by the pollen tube cell of the male gametophyte to achieve successful fertilization. Long-distance pollen tube guidance is controlled by the seven-celled female gametophyte, the embryo sac. Previous reports showed that the synergid cell of the embryo sac is essential for pollen tube guidance. Here, we report the identification of a central cell guidance (ccg) mutant, which is defective in micropylar pollen tube guidance. CCG encodes a nuclear protein with an N-terminal conserved zinc beta-ribbon domain that is functionally interchangeable with that of TFIIB in yeast. This suggests that CCG might act as a transcription regulator for pollen tube guidance. CCG is expressed in the central cell of the female gametophyte. Expression of CCG in the central cell alone is sufficient to restore the normal pollen tube guidance phenotype, demonstrating that the central cell plays a critical role in pollen tube guidance.

引用

页码：3563 / 3577

页数：15

共 70 条

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