What is the purpose of glandular trichomes?
Glandular trichomes, epidermal appendages found on the stems and leaves of many plants, store and secrete secondary metabolites in a species- and cultivar-specific fashion. The accumulation of these toxic compounds at the plant’s surface may provide a first line of defense against insects, pathogens, and herbivores.
Where are trichomes found?
Trichomes are epidermal protuberances located on aerial parts of plant, that protect plant from excess transpiration, high temperature, radiation, ultraviolet (UV) light, and herbivore attack (Wagner et al., 2004).
What do glandular trichomes secrete?
Glandular trichomes are characterized by the presence of cells that have the ability to secrete or store large quantities of secondary (also called specialized) metabolites, which contribute to increasing the plant fitness to the environment (for details, see Box 1).
What are the types of trichomes?
Trichomes are either glandular or non-glandular. These types of trichomes are known to secrete various substances including water, nectar, resins, mucilage and terpens among others. Apart from their capacity to secrete, glandular trichomes can also be grouped in accordance to the number of cells.
What is glandular organ?
consisting of, containing, or bearing glands. 2. of, pertaining to, or resembling a gland: a glandular disorder. 3. visceral; instinctive.
What is a glandular condition?
Definitions of glandular disorder. a disorder of the glands of the body. synonyms: adenosis, gland disease, glandular disease.
What is it in trichomes that might cause your skin irritation?
The stinging trichomes of the leaves and stems have bulbous tips that break off when brushed against, revealing needlelike tubes that pierce the skin. They inject a mix of acetylcholine, formic acid, histamine, and serotonin, causing an itchy, burning rash in humans and other animals that may…
Is trichome a Septate?
The stalks of the trichome are septate.
What is the importance of trichomes in plants?
Trichomes can be insulating by keeping frost away from leaf cells. They can help reduce evaporation by protecting the plant from wind and heat. In many cases, trichomes protect plants from herbivorous insects that may want to feed on them.
What are the 3 types of glandular secretions?
The three mechanisms by which exocrine glands release their secretions include merocrine, apocrine, and holocrine.