In the model plant "Arabidopsis thaliana", trichome formation is initiated by the GLABROUS1 protein. Overall, this study suggests that glandular trichome density is an important factor of insect resistance. Females smear a plant substrate, plant extrafloral trichome secretions, on brood cells. The trichome is a glandular structure on the ventral surface of the third abdominal segment. The essential oils of this species are store in the glandular peltate trichome. Studies have shown that trichome morphology and chemical composition has a role in herbivory response. The significance of trichome is to enhance leaf permeability. They are black or brown in colour and covered in trichome hairs and small leaves. Each trichome has an akinete as the basal cell near the center of the colony. The buds have a trichome coverage, which are hidden by its thick hairs. The types of trichome present on the leaves of "Kalanchoe" vary among the different species. Each filament of oscillatoria consists of trichome which is made up of rows of cells. The upper part of the trichome cell contains flavonoids, "e.g." quercitrin and myricitrin. A common type of trichome is a hair. The tip of the trichome oscillates like a pendulum.