June 2, 2010
Plants Spice Up Their Sex Life With Defensins
Since the beginning, plants and animals have deployed various mechanisms to fight pathogens. Proteins have always played an important part in this armoury, and a broad variety of defensin proteins have become part of the immune system of plants, insects and other animals except mammals. Now scientists from Regensburg discovered that those proteins also play a role in the "sex life" during the fertilization process of plants. These findings will be published next week in the online, open access journal PLoS Biology.
The research team, led by Dr. Thomas Dresselhaus from the Regensburg Center of Biochemistry and Biophysics, showed that special forms of defensins are released by the egg apparatus in maize to open up potassium-ion channels in the male partner "“ the pollen tube "“ resulting in an explosive release of male sperm cells. This process is a pre-requisite for the fertilization that follows.
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