Haustorium
Haustorium
Haustorium (pronunciation: haw-stor-ee-uhm) is a specialized structure that is formed by certain parasitic plants, fungi, and lichens. It is used to penetrate the tissues of a host organism and absorb nutrients and water.
Etymology
The term 'haustorium' is derived from the Latin word 'haustor', which means 'one who draws with a pump'. This is a reference to the haustorium's function of drawing nutrients from the host.
Function
The primary function of a haustorium is to facilitate the absorption of nutrients from the host organism. It does this by penetrating the host's tissues and establishing a connection with the host's vascular system. This allows the parasitic organism to draw nutrients and water directly from the host.
Structure
A haustorium typically consists of a penetrating organ, which is used to breach the host's tissues, and a network of filaments, which are used to absorb nutrients. The exact structure of a haustorium can vary depending on the species of the parasitic organism.
Related Terms
- Parasitic plant: A plant that derives some or all of its nutritional requirements from another living plant.
- Fungi: A group of organisms that includes yeasts, molds, and mushrooms. Some fungi form haustoria to absorb nutrients from their hosts.
- Lichen: A composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship. Some lichens form haustoria to absorb nutrients from their hosts.
- Vascular system: The system of vessels and tissues that carry or circulate fluids such as blood or sap through the body of an animal or plant.
External links
- Medical encyclopedia article on Haustorium
- Wikipedia's article - Haustorium
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