tyloseor tylosis

Tyloseclick for a larger image
Fig. 307 Tylose . An outgrowth into the xylem vessel.

tyloseor tylosis

an outgrowth from xylem parenchyma in the XYLEM VESSELS, produced in response to either severe water shortage or, more usually, to the presence of pathogenic organisms. The growth of tyloses often causes the vessels to become blocked, so preventing water transport.