Haustoria


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Related to Haustoria: haustorial

haustoria

[hau̇′stȯr·ē·ə]
(mycology)
Specialized branches of hyphae that penetrate host cells and absorb nutrients from them.

Haustoria

 

in plants, unicellular or multicellular formations that serve to absorb various substances.

Haustoria in parasitic angiosperms (for example, in the dodder and the broomrape) are multicellular formations that are, for the most part, modified roots. They develop upon contact of the parasitic plant with the body of the host plant, taking root in the host’s tissue and absorbing nutritive substances from it. The haustoria of endosperms and of other structures of the embryonic sac in certain angiosperms are modified cells that serve to increase the intake of nutritive substances by the embryo from the surrounding tissues. In fungi the haustoria are outgrowths of the fungus cells that penetrate into the host’s cells.

References in periodicals archive ?
Palabras Clave: afido o pulgon de la raiz de frijol; orobanque ramificado; planta holoparasitaria; haustoria
Students demonstrating (A) Dodder, a plant unfamiliar competency in evolutionary species, have haustoria. taxa/traits reasoning using familiar How would biologists taxa/traits often have explain how the dodder difficulty abstracting species with haustoria their thinking to evolved from the ancestral unfamiliar cases (e.g., species that lack dodder haustoria).
Haustorial initiation percentage was calculated at 5 d by dividing the number of germinated striga seed having recognizable haustoria by the number of germinated weed seeds within the 3-mm sorghum root zone.
Cells of the mycobiont fit together tightly like cobblestones on a walkway, extended haustoria into the Physolinum cells, and contained concentric bodies.
Its root-like organs, called haustoria, seek out the roots of nearby crops, then rob them of water, nutrients, and life.
infests its host by coiling around the host stem or leaf and sending haustoria into the host's vascular system (Kelly 1992).
Fungi attack algal filaments by specialized hyphal branches, or haustoria, and often continue to grow inside algal filaments.
Mildew hyphae grow on the exterior of the plant and remove nutrients from their host via haustoria sent into epidermal cells.
The role of degrading enzymes are very important in mycoparasitism process that enable Trichoderma to derive the nutrients from the host via haustoria (Kubicek et al., 2001; Verma et al., 2007; Saba et al., 2012).
The parasite seedlings then infect the nearby host roots forming haustoria on them.
Interface between haustoria of parasitic members of the Scrophulariaceae and their hosts: A histochemical and immunocytochemical approach.