Rhizoid


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

rhizoid

[′rī‚zȯid]
(botany)
A rootlike structure which helps to hold the plant to a substrate; found on fungi, liverworts, lichens, mosses, and ferns.

Rhizoid

 

one of the unicellular or multicellular filaments arranged in a row in mosses, lichens, and some algae and fungi (for example, Rhizopus). Rhizoids serve for attachment to a substrate, from which they absorb water and extract nutrients. The filaments resemble root hairs. In marchantiaceous mosses there are special rhizoids consisting of dead cells along which water moves by means of wick action.

References in periodicals archive ?
The germination of this species is of the Vittaria type (Nayar & Kaur 1968), as the first prothallial cell appears by means of a division that occurs perpendicular to the first rhizoid. This is one of the most common patterns of germination within leptosporangiates, and it has been cited as usual in the Pteridaceae (Nayar & Kaur 1969, 1971).
Nussbaum and Wilson each, in quite dissimilar ways, develop theoretical models for emotions that show them to be, no matter how strong the illusion of simple spontaneity and immediacy, multi-layered and rhizoid.
In accordance with Mendoza-Ruiz (2001), the criterion used in this study to determine spore germination is the formation of the first rhizoid and/or prothallial cells or both simultaneously.
Ruminal mold goes through a series of changes and developments, starting with the release zoospores after 15 min to 1 h of feeding and then continues through several stages such as germination, development of rhizoid, differentiation and etc.
However, the rhizoid (a rootlike extension) of the alga Chara is a model system in which all stages of gravitropism can be analyzed in a single cell (Braun and Sievers, 1994; Kiss, 1994; Sievers et al., 1996).
ce= spore coat, cp= prothallial cell, cr= rhizoidal cell, gg= oil bodies, r= rhizoid.
The anaerobic fungi contribute mainly to fiber digestion in the rumen with their effective cellulolytic enzymes as well as physical penetration of fungal rhizoid into the fiber matrix (Ho and Abdullah, 1988).
richardii spore polarity by gravity is that the direction of growth of the primary rhizoid, when it emerges, is downward, in line with the vector of gravity (Edwards and Roux, 1994).
The identification of the isolated Flavobacterium strain was checked on the basis of the characteristic yellow-green colonies, with rhizoid edges that contained Gram negative rods exhibiting gliding motility (Shamsudin and Plumb, 1996).