rhizome


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rhizome

(rī`zōm) or

rootstock,

fleshy, creeping underground stem by means of which certain plants propagate themselves. Buds that form at the joints produce new shoots. Thus if a rhizome is cut by a cultivating tool it does not die, as would a root, but becomes several plants instead of one, which explains why such weeds as Canada thistle and crabgrass are so hard to eradicate. Ginger, the common iris, trillium, and Solomon's-seal all have rhizomes. True arrowroot is starch from the rhizome of a West Indian plant. See perennialperennial,
any plant that under natural conditions lives for several to many growing seasons, as contrasted to an annual or a biennial. Botanically, the term perennial applies to both woody and herbaceous plants (see stem) and thus includes numerous members of the kingdom.
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rhizome

a concept developed by Gilles DELEUZE and Félix GUATTARI in Rhizome: an Introduction (1976). At its simplest, the rhizome indicates a means of thinking other than in conventional, ‘arborescent’ ways. Those latter forms are seen to have dominated Western thought, imposing on ‘vertically inclined’ structures which introduce hierarchies and specific, static ‘placings’. In contrast, rhizomic approaches attempt to proceed in other directions, that is, outwards and horizontally avoiding regulation.

Rhizome

 

the underground stem of perennial herbs differing from a root by the presence of small scaly or filmy leaves (that leave scars after dropping off), by the lack of a root cap at the end of the growing part, and, anatomically, by the presence of parenchyma.

Buds form in the nodes or sinuses of the leaves of the rhizome that annually produce new underground shoots and secondary roots. These utilize the nutrients stored in the rhizome. New shoots also form after the death of the aboveground part of the plant as a result of unfavorable conditions (for example, drought) or of crushing or eating by animals. In some plants (orchard grass, timothy), the rhizomes are short and the shoots that form on them above ground grow in a thick bunch. In others (reeds or couch grass), the rhizomes are long, grow rapidly, and branch. After the old parts of the rhizome die off, the underground shoots that have formed on it individuate (that is, vegetative reproduction occurs). The rhizomes in some plants are greatly thickened, tubes forming on them (usually at the ends) that contain primarily carbohydrates. Some rhizomes contain medicinal substances (as in the medicinal valerian), dyes (as in elecampane), or tannins (as in willow grass). Plants with long rhizomes are used to fix sandy soils.

rhizome

[′rī‚zōm]
(botany)
An underground horizontal stem, often thickened and tuber-shaped, and possessing buds, nodes, and scalelike leaves.

rhizome

a thick horizontal underground stem of plants such as the mint and iris whose buds develop new roots and shoots
References in periodicals archive ?
Rhizome was more sensitive than the other organs, which had the highest accumulation of [Na.sup.+] and [Cl.sup.-] and the lowest levels of N[O.sub.3.sup.-] and [K.sup.+], followed by roots.
Although this species has a pachymorph rhizome, intrinsically leading to dense culm growth even in the absence of herbivory, the greater culm density under grazed conditions suggests that herbivory has contributed to densification.
Coptis Rhizome powder (1.0 g) prepared by traditional grinding or ultrafining technology was extracted with 10 mL methanol in a 100 mL flask, respectively.
Replant rhizomes that feel firm and are free of blemishes or other injuries.
The tough, fibrous root is edible any time of year, though it's best in late fall or winter, when the starch is stored in the rhizome. Thoroughly clean the roots and pound them in a container of water to separate the starch, which you can collect by filtering out the fiber and letting the starch settle, or by boiling it all down.
The objective of the present work was to determine the component composition of the essential oil of the rhizomes and leaves of I.
Multiple shoots were cultured from the rhizome bud explants of S.
Meanwhile, shoot Biomass & root Biomass; seedlings total Biomass & rhizome length as well as root-to-shoot Biomass ratio & height to RCD ratio were also strongly correlated to each other (p < 0.01).
Scavenging activity was expressed as mg of ascorbic acid (AA) per mL of aqueous Rheum rhizome extract.
(5) Net Art Anthology, Rhizome, http://anthology.rhizome.org/.
Assessment of the presence of the pest and of borer attacks on the plant rhizome was performed from October 20 to November 5, 2010, when the fruits were nearly ready for harvest.
Multiple classes of phytochemicals including anthocyanidins, anthraquinones, esters, fatty acids, phenolic compounds, flavonoids, glycosides, polysterols, saponins, sugars, tannins, and triterpenoids have been isolated from rhizome extracts of E.