シロイヌナズナの花粉管誘引物質LUREペプチド群の発見(<特集>植物ペプチドシグナル)

概要

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Pollen tube guidance is a crucial mechanism for successful fertilization in angiosperms, which precisely controls directional growth of pollen tubes of own species to deliver immotile sperm cells to an embryo sac. Since pollen tubes were observed to grow toward excised pistil tissues on a medium in the late nineteenth century, plant biologists have conducted studies to reveal mechanisms of pollen tube growth and guidance. Recently, pollen tube attractants, LURE peptides, have been identified in a unique dicot, Torenia fournieri. However, universal molecular mechanisms involving species-specific pollen tube attraction are still unclear. In this review, we present identification of pollen tube attractants of Arabidopsis thaliana, AtLURE1 peptides, and discuss universality, species specificity, and expression mechanism of the attractant molecules.
2013-05-31