Pollen Tube Guidance by Attractant Molecules: LUREs

Cell Structure and Function

Satohiro Okuda¹  Tetsuya Higashiyama¹ 

[1] Division of Biological Science, Graduate School of Science, Nagoya University

关键词: pollen-tube guidance;    attractants;    synergid cell;    peptide signaling;   

DOI  :  10.1247/csf.10003

学科分类：分子生物学，细胞生物学和基因

来源: Japan Society for Cell Biology

【 摘 要 】

References(46)Cited-By(14)Sexual reproduction in flowering plants requires pollen-tube guidance, which is thought to be mediated by chemoattractants derived from target ovules. To date, however, no convincing evidence has been reported of a particular molecule being the true attractant. Emerging data indicate that two synergid cells, which are on either side of the egg cell, emit a diffusible, species-specific signal to attract the pollen tube at the last step of pollen-tube guidance. Recently, it was demonstrated that LUREs (LURE1 and LURE2), cysteine-rich polypeptides secreted from the synergid cell, are the key molecules in pollen-tube guidance. In this review, we summarize the mechanism of pollen-tube guidance, with special focus on gametophytic guidance and the attractants.

【 授权许可】

Unknown