Cleistogamy

Cleistogamy or Automatic self-pollination describes the trait of certain plants to propagate by using non-opening, self-pollinating flowers. Especially in peanuts, peas, and beans, this behaviour is most widespread in legumes.

For genetically modified (GM) rapeseed, researchers hoping to minimise the admixture of GM and non-GM crops are attempting to use cleistogamy to prevent gene flow. However, preliminary results from Co-Extra, a current project within the EU research programme, show that although cleistogamy reduces gene flow, it is not at the moment a consistently reliable tool for biocontainment: due to a certain instability of the cleistogamous trait, some flowers may open and release genetically modified pollen.

The more common opposite of cleistogamy is called chasmogamy – meaning "opening flowers".

See also

• Co-existence of genetically modified, conventional, and organic crops