Definition of haustorium in English:

haustorium

Line breaks: hau|stor¦ium
Pronunciation: /hɔːˈstɔːrɪəm
 
/

noun (plural haustoria /-rɪə/)

Botany
A slender projection from the root of a parasitic plant, such as a dodder, or from the hyphae of a parasitic fungus, enabling the parasite to penetrate the tissues of its host and absorb nutrients from it.
More example sentences
  • Parasitic plants can form haustoria within various host tissues, and this has led to convenient, yet unsatisfactory distinctions being made between a ‘shoot parasite’ and a ‘root parasite’.
  • Cuscuta contains at least 158 species that no longer possess leaves, but their stems twine around host plants producing numerous haustoria to obtain nutrients.
  • The germinated seedling infects host roots by developing an haustorium that penetrates the host root and serves as a physiological bridge between the two organisms.

Origin

late 19th century: modern Latin, from Latin haustor 'thing that draws in', from the verb haurire.

Derivatives

haustorial

adjective
More example sentences
  • The placentas are likewise the same in the four genera and comprise elongate haustorial sporophyte cells growing into the closely adjacent gametophyte cells.
  • The host sieve elements of the phloem are lined by haustorial transfer cells of the parasite, which then allow unloading of host phloem solutes into the parasite haustorium.
  • The sucrose supplied by the megagametophyte is absorbed by the embryo cotyledons, acting as haustorial organs, and then transported into the embryonic tissues for seedling growth and development.

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