When damaged the plant secretes a white fluid which is toxic, causes severe skin irritation and may be a tumor promoting agent.

In allelopathy, a plant secretes chemicals which make the surrounding soil uninhabitable, or at least inhibitory, to competing species.

These plants also secrete a substance that kills growths such as mold and mildew on their own leaves.

The mutant is immune to a stress hormone that plants secrete in times of drought.

Especially in warm climates, plants secrete waxes as a way to control evaporation and hydration.

The plant meanwhile secretes esterase, peroxidase, phosphatase and protease enzymes.

There is no consensus on why plants secrete resins.

Some plants secrete allelochemicals from their roots which inhibit the growth of other organisms.

Contact with frass causes plants to secrete chitinase in response to its high chitin levels.

In return for the 'fixed' nitrogen, the plant secretes sugars to the symbiotic bacteria.