How 'Companion' Cells To Sperm Protect Them From Genetic Damage

In plant pollen grains, sperm cells, which carry the genetic material to be passed on to progeny, are cocooned within larger "companion" cells that provide sperm with energy and nourishment. A team of plant geneticists has now discovered that the companions also provide sperm with small RNA molecules that protect sperm DNA from damage, thus helping the next generation to inherit a stable genome.

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