Heteroecious

Heteroecious

A heteroecious parasite is one that requires at least two hosts. The "primary host" is the host in which the parasite spends its adult life; the other is the "secondary host".

Heteroecious parasites include:
*"Gymnosporangium" (Cedar-apple rust); the juniper is the primary (telial) host and the apple, pear or hawthorn is the secondary (aecial) host
*"Cronartium ribicola" (White pine blister rust); the primary host are white pines, and currants the secondary.

History

The phenomenon of heteroecy was first discovered by A.S. Ørsted in 1863.
*Ørsted, A.S. (1963) Om Sygdomme hos Planterne, som foraarsages af Snyltesvampe, navnlig om Rust og Brand og om Midlerne til deres Forebyggelse. Kjøbenhavn.


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Look at other dictionaries:

  • Heteroecious — Het er*[oe] cious, a. [Hetero + Gr. ? house.] (Bot.) Passing through the different stages in its life history on an alternation of hosts, as the common wheat rust fungus ({Puccinia graminis}), and certain other parasitic fungi; contrasted with… …   The Collaborative International Dictionary of English

  • heteroecious — [het΄ər ē′shəs] adj. 〚/span> HETERO + Gr oikia, a house (see ECO ) + OUS〛 Biol. living as a parasite on first one species of host and then another heteroecism [het΄ər ēsi …   Universalium

  • heteroecious — [het΄ər ē′shəs] adj. [< HETERO + Gr oikia, a house (see ECO ) + OUS] Biol. living as a parasite on first one species of host and then another heteroecism [het΄ər ēsiz΄əm] n …   English World dictionary

  • heteroecious — adjective of parasites; passing through different stages of the life cycle on different host species heteroecious fungi heteroecious insects • Ant: ↑autoecious …   Useful english dictionary

  • heteroecious — adjective Etymology: heter + Greek oikia house more at vicinity Date: 1882 passing through the different stages in the life cycle on alternate and often unrelated hosts < heteroecious aphids > • heteroecism noun …   New Collegiate Dictionary

  • heteroecious — het·er·oe·cious .het ə rē shəs adj passing through the different stages in the life cycle on alternate and often unrelated hosts <heteroecious insects> het·er·oe·cism rē .siz əm n * * * het·er·oe·cious (het″ər eґshəs) [heter …   Medical dictionary

  • heteroecious — См. heteroicous …   Dictionary of invertebrate zoology

  • heteroecious — adjective Of dependent organisms, spending portions of the life cycle on different types of hosts. Syn: metoecious …   Wiktionary

  • heteroecious — adj. (about parasitic fungi) moving from host to host during development (Biology) …   English contemporary dictionary

  • heteroecious — het·er·oe·cious …   English syllables

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