My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in CS

  1. Vol. 35 No. 6, p. 1521-1526
     
    Received: Feb 17, 1995
    Published: Nov, 1995


    * Corresponding author(s): taylorl@wsuvml.csc.wsu.edu
 View
 Download
 Alerts
 Permissions

doi:10.2135/cropsci1995.0011183X003500060001x

Flavonols: Effects on Fertility and Fecundity

  1. Loverine P. Taylor 
  1. Dep. of Genetics and Cell Biology and Horticulture and the Program in Plant Physiology, Washington State Univ., Pullman WA 99164-4234

Abstract

Abstract

Flavonols are required for successful fertilization in maize (Zea mays L.) and petunia (Petunia × hybrida Vilm.). Pollen lacking flavonols is unable to produce a functional pollen tube, but this defect can be reversed and pollen function “rescued” by the timely application of kaempferol, a flavonol aglycone. Biochemical complementation of mature petunia pollen is achieved (i) at pollination by wild-type stigma exudate, (ii) by exogenous application of kaempferol to the stigma or pollen at pollination, and (iii) by supplementing a pollen suspension in germination medium with flavonol aglycones. The last method forms the basis of a sensitive in vitro bioassay used to identify compounds that induce pollen germination. It also provides a model system for a focused and systematic investigation of flavonol-stimulated pollen germination. In addition to increased understanding of basic flavonol biology in reproductive organs, an unexpected bonus was the finding that plant fecundity can be enhanced by manipulating the levels of flavonol aglycones (kaempferol) in stigmas.

Support for this research was provided by the US Dep. of Agric. National Res. Initiative Competitive grant no. 9303093 and the National Science Foundation Grant No. 92-06712 to LPT.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .

Facebook   Twitter