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Ann Bot. 2011 Sep;108(4):739-47. doi: 10.1093/aob/mcr111. Epub 2011 May 5.

Identification and characterization of TcCRP1, a pollen tube attractant from Torenia concolor.

Author information

1
Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. mkanaoka@bio.nagoya-u.ac.jp

Abstract

BACKGROUND AND AIMS:

During sexual reproduction in higher angiosperms, the pollen tubes are directed to the ovules in the pistil to deliver sperm cells. This pollen tube attraction is highly species specific, and a group of small secreted proteins, TfCRPs, are necessary for this process in Torenia fournieri.

METHODS:

A candidate pollen tube attractant protein in Torenia concolor, a related species of T. fournieri, was isolated and the attractant abilities between them were compared.

KEY RESULTS:

TcCRP1, an orthologous gene of TfCRP1 from T. concolor, is expressed predominantly in the synergid cell. The gene product attracted pollen tubes in a concentration-dependent manner, but attracted fewer pollen tubes from the other species.

CONCLUSIONS:

The results indicated that this class of CRP proteins is a common pollen tube attractant in Torenia species. The sequence diversity of these proteins is important for species-specific pollen tube attraction.

PMID:
21546430
PMCID:
PMC3170153
DOI:
10.1093/aob/mcr111
[Indexed for MEDLINE]
Free PMC Article

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