Trichome: Difference between revisions
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== Trichome == | == Trichome == | ||
[[File:Cap1033-botao1.jpg|Trichomes on a plant bud|thumb|right]] | |||
'''Trichomes''' are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are highly variable in form and function and can be found on the stems, leaves, flowers, and fruits of plants. Trichomes can be unicellular or multicellular and may be glandular or non-glandular. | |||
== Types of Trichomes == | == Types of Trichomes == | ||
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Trichomes can be classified into several types based on their structure and function: | Trichomes can be classified into several types based on their structure and function: | ||
=== Non-Glandular Trichomes === | |||
Non-glandular trichomes are primarily involved in protecting the plant from herbivores and environmental stress. They can be simple hairs or more complex structures. | |||
=== Glandular Trichomes === | |||
[[File:Drosera_capensis_bend.JPG|Glandular trichomes on ''Drosera capensis''|thumb|left]] | |||
Glandular trichomes secrete substances such as oils, resins, or mucilage. These secretions can deter herbivores, attract pollinators, or reduce water loss. For example, the glandular trichomes on the leaves of the carnivorous plant ''[[Drosera capensis]]'' secrete a sticky substance to trap insects. | |||
== Functions == | == Functions of Trichomes == | ||
Trichomes serve | Trichomes serve various functions depending on their type and location: | ||
* '''Protection''': Trichomes can | * '''Protection''': Trichomes can protect plants from herbivores by making the plant surface less palatable or more difficult to consume. | ||
* '''Temperature Regulation''': They can help in regulating temperature by reflecting sunlight and reducing water loss through transpiration. | |||
* '''Secretion''': Glandular trichomes can secrete substances that deter herbivores or attract pollinators. | |||
* '''Physical Barrier''': They can act as a physical barrier against pathogens and insects. | |||
== Trichomes in Different Plants == | |||
[[File:Trichomes_Close_Cannabis.jpg|Close-up of cannabis trichomes|thumb|right]] | |||
Trichomes are found in a wide variety of plants, each adapted to the specific needs of the plant: | |||
* '''Cannabis''': The trichomes on cannabis plants are known for producing cannabinoids, which have psychoactive and medicinal properties. | |||
* '''''[[Solanum scabrum]]''''': This plant has trichomes on its leaf lamina that can deter herbivores. | |||
* '''''[[Solanum quitoense]]''''': The petiole of this plant is covered with trichomes that may protect it from pests. | |||
== Fossilized Trichomes == | |||
[[File:Sternhaar_in_Baltischem_Bernstein.jpg|Trichomes preserved in amber|thumb|left]] | |||
Trichomes can also be found in the fossil record, preserved in substances like amber. These fossilized trichomes provide valuable information about ancient plant life and the environments in which they lived. | |||
== Related Pages == | == Related Pages == | ||
* [[Plant morphology]] | * [[Plant morphology]] | ||
* [[Glandular hair]] | * [[Glandular hair]] | ||
* [[Leaf]] | |||
* [[Plant defense against herbivory]] | |||
* | |||
* | |||
[[Category:Plant anatomy]] | [[Category:Plant anatomy]] | ||
[[Category:Plant morphology]] | |||
Latest revision as of 10:44, 23 March 2025
Trichome[edit]
Trichomes are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are highly variable in form and function and can be found on the stems, leaves, flowers, and fruits of plants. Trichomes can be unicellular or multicellular and may be glandular or non-glandular.
Types of Trichomes[edit]
Trichomes can be classified into several types based on their structure and function:
Non-Glandular Trichomes[edit]
Non-glandular trichomes are primarily involved in protecting the plant from herbivores and environmental stress. They can be simple hairs or more complex structures.
Glandular Trichomes[edit]
Glandular trichomes secrete substances such as oils, resins, or mucilage. These secretions can deter herbivores, attract pollinators, or reduce water loss. For example, the glandular trichomes on the leaves of the carnivorous plant Drosera capensis secrete a sticky substance to trap insects.
Functions of Trichomes[edit]
Trichomes serve various functions depending on their type and location:
- Protection: Trichomes can protect plants from herbivores by making the plant surface less palatable or more difficult to consume.
- Temperature Regulation: They can help in regulating temperature by reflecting sunlight and reducing water loss through transpiration.
- Secretion: Glandular trichomes can secrete substances that deter herbivores or attract pollinators.
- Physical Barrier: They can act as a physical barrier against pathogens and insects.
Trichomes in Different Plants[edit]
Trichomes are found in a wide variety of plants, each adapted to the specific needs of the plant:
- Cannabis: The trichomes on cannabis plants are known for producing cannabinoids, which have psychoactive and medicinal properties.
- Solanum scabrum: This plant has trichomes on its leaf lamina that can deter herbivores.
- Solanum quitoense: The petiole of this plant is covered with trichomes that may protect it from pests.
Fossilized Trichomes[edit]
Trichomes can also be found in the fossil record, preserved in substances like amber. These fossilized trichomes provide valuable information about ancient plant life and the environments in which they lived.
