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Sticky trichomes of a carnivorous plant, Drosera capensis with a trapped insect, contain proteolytic enzymes Glandular trichomes on Cannabis, rich in cannabinoids Trichomes on the surface of a Solanum scabrum leaf Trichomes on the petiole of a Solanum quitoense leaf Antirrhinum majus buds with glandular hairs Scanning electron micrograph of a trichome on a leaf of Arabidopsis thaliana; the ...
Although trichomes are used for protection, they can be disadvantageous for plants at times because trichomes may reflect light away from the plant that can be used to photosynthesize. [2] The cuticle is a layered structure of waxes and hydrocarbons located on the outer layer of the epidermis which also helps protect the plant from stress. [2]
A stinging plant or a plant with stinging hairs is a plant with hairs on its leaves or stems that are capable of injecting substances that cause pain or irritation. Other plants, such as opuntias , have hairs or spines that cause mechanical irritation, but do not inject chemicals.
Urtica dioica is a dioecious, herbaceous, and perennial plant. It grows to 0.9 to 2 metres (3 to 7 feet) tall in the summer and dying down to the ground in winter. [6] It has widely spreading rhizomes and stolons, which are bright yellow, as are the roots.
These substances play a role in defending the plant from pathogens including insects, fungi, viruses and bacteria. [1] [2] THC and CBD are stored mostly in the trichomes of the plant, [3] and can cause psychological and physical impairment in the user, via the endocannabinoid system and unique receptors.
In anything like the zoological sense, no plants or fungi have hair or wool, although some structures may resemble such materials. The term "glabrous" strictly applies only to features that lack trichomes at all times. When an organ bears trichomes at first, but loses them with age, the term used is glabrescent.
Trichomes develop at a distinct phase during leaf development, under the control of two major trichome specification genes: TTG and GL1. The process may be controlled by the plant hormones gibberellins , and even if not completely controlled, gibberellins certainly have an effect on the development of the leaf hairs.
The cause of the intense pain has been the subject of scientific research since European explorers first encountered the plant in the mid-19th century. [9] While it is known that a cocktail of toxins is contained within the trichomes, its exact nature was not fully understood as of 2018.