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Related to haustorium: Appressorium, haustorial


, pl.


(haw-stō'rē-ŭm, -stō'rē-ă),
An organ to absorb nutriment.
[Mod. L. fr. L. haustus, drinking in or draw up]
Farlex Partner Medical Dictionary © Farlex 2012


  1. a specialized development of the end of a HYPHA in parasitic fungi, penetrating a cell of the host and forming a food-absorbing organ.
  2. (in other parasitic plants) the organ that penetrates the host and acts as a food-absorbing organ.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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References in periodicals archive ?
A seed was considered to have a haustorium when the radical tips were swollen and formed hair.
Evaluation of endophytic bacterial isolates on germination and haustorium initiation of Strigahermonthica (Del.) Benth.
The results showed that NH absolutely inhibited haustoria initiation in response to haustorium factor, while Mg caused a significant reduction in haustorial initiation compared to the control.
Preservation for extended periods in 95 % ethanol, as these specimens had been, results in host insects becoming stiff and brittle, and as a result, it was not possible to extract the penetrating haustorium intact.
Of the eight bacteria tested only three (G7, Azotobacter and G8) affected significant inhibition of haustorium initiation in response to DMBQ in comparison to the corresponding nutrient broth control.
It is known that Rhamphicarpa fistulosa connects its xylem system to the host plantthrough haustorium. Parenchyma cells building were towards differentiated with cells provided by the periphery of the hautorium.
A striga seedling was counted as having a haustorium only if hairlike projections (tubercles) were present on its radicle.
Although visual examination of haustorial connections between parasites and hosts indicates the possibility that a parasite is attacking a particular host, parasitic plants will form haustoria on dead plant material or even pebbles (Piehl 1963), making it unclear whether a particular haustorium is in fact functional.
This experiment was undertaken to investigate the effects of bacterial strains and isolates on in situ germination, haustorium initiation and penetration of intact sorghum roots.
Water, nitrogen, fixed carbon compounds, and minerals are moved unidirectionally from host to parasite through a physical connection, the haustorium (Stewart and Press 1990, Seel et al.