Question

Which of the following is incorrect for trichomes?
A) Trichomes are leaf modifications which minimize water loss
B) Usually multicellular
C) They may even be secretory
D) Help in water absorption

Answer 1

Hint: Trichomes are referred to as the “hairs”. These are the appendages or fine outgrowths present on surfaces of algae, plants, certain protists and lichens. Their function as well as structure is diversified.

Complete answer:
Trichomes are present as an epidermal outgrowth. These hairs prevent plants from excessive heat in hot and humid areas by forming a dense layer above the epithelial layer thus protecting the delicate cells and tissues present below it. They vary across species as well as on various organs within species in terms of their density, location, form and size. These are majorly found in the reproductive as well as vegetative parts of the plant. Trichomes resemble thin hair like structures which may possibly be multicellular or unicellular. Moreover, these trichomes form secretions therefore they are also known as glandular trichomes. The secretory products of trichomes include resins, tannins, gum etc. Also, trichomes readily absorb minerals and water.

Hence, trichomes are not leaf modifications, So, the correct answer is option “A”.

Note: These trichomes or hairs present on the surfaces prevent the plant from certain herbivores at least to some extent. These hairs are stiff and sometimes irritable to the palate of herbivores therefore they avoid feeding on such plants. These hairs prevent the deposition of frosts on living cell surfaces. These trichomes help in reducing the rate of transpiration in plants located in high intensity wind areas. The flow of air is broken by these hairs thus minimizing the water loss through transpiration process.