root hair


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

root hair

n.
A thin hairlike outgrowth of an epidermal cell of a plant root that absorbs water and minerals from the soil.

root hair

a hair-like outgrowth from the epidermis of roots. Root hairs occur in large numbers in a zone behind the growing tip, are short-lived, and greatly increase the absorbing area of the root.
References in periodicals archive ?
Root hair infection process and myconodule formation on Alnus incana by Penicillium nodositatum.
The model is based on the transport equation of Nye and Marriot (1969) extended by a term A to take uptake by root hairs into account (Claassen and Steingrobe, 1999):
Water is taken up by root hairs in a passive process called osmosis.
LP environments, including greater root hair length and density (Yan et al.
Organic anion release can also increase the availability of soil P (see later discussion); however, the location of organic anion release differs between the 2 mechanisms (Barcelo and Poschenrieder 2002)--for Al-tolerance the organic anions are released from the root tip, and for P deficiency the organic anions are normally released from the root hair zone or from proteoid roots.
The cross sections of roots in un-compacted soil had a regular outline with the epidermis composed of smaller cells and lots of root hairs, whereas in the compacted soil the epidermal cells and some cortex cells were damaged with the remnants occupying the outside of the root.
root in control group (2A) and after treatment of seeds with aqueous extracts of very young leaves at concentrations of 1%, 3% and 5%(2B, 2C, 2D) Rh: Root hair, Ep: Epidermis, P: Parenchyma, En: Endodermis, Pc: Peripheral cycle, Xy: Xylem, Ph: Phloem, Pi: Pith.
PCR enabled us to quickly determine which sequences were most highly expressed in root hair cells, where sorgoleone is made, compared with other parts of the plant," says Baerson.
It's pretty hard to immediately tell the difference between this tiny, threadlike thing and a root hair," says Paul Marek.
Root hair lengths of seedlings that had germinated in 7 d were not different for the main effects or their interactions (P [greater than or equal to] 0.
These aggregates were physically attached to the root hairs and appeared to have aggregated around the root hair (Fig.