How Plants Maintain a Healthy Sperm-Egg Ratio

Current molecular biochemistry, microscopy and genetic techniques have become so powerful that scientists can now make mechanistic discoveries – supported by multiple lines of evidence – about intimate processes in plant reproduction that once were very difficult to examine, says molecular biologist Alice Cheung at the University of Massachusetts Amherst.

She is the senior author of a new paper in Nature describing how she and her team used such tools to solve, in unprecedented detail, the mechanisms of how flowering plants avoid polyspermy. As the name suggests, polyspermy results from multiple sperm entering and fertilizing an egg, a condition harmful to the zygote. In plants, preventing polyspermy also means higher chances for more females to be fertilized and ensures better seed yields, both of which are agriculturally important.

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