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 ?
Set the rhizome on top of the mound and spread the roots down the edges.
Therefore, the component composition of the oil of these irises is similar to the oil composition of the rhizomes of Iris nigricans of Jordan (38), the rhizomes of Iris sofarana, and of the flowers of Iris kerneriana from Turkey.
25 [micro]L of Rheum rhizome extract in the final concentration range of 0.25-5.0 mg/mL was added to a 96-well plate containing 125 [micro]L of distilled water followed by the addition of 10 [micro]L of 5% sodium nitrite solution.
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.
Krause, "Flavonoids from the rhizomes of Elephantorrhiza elephantina and Pentanisia prunelloides," Journal of Medicinal Plants Research, vol.
australis (root, rhizome, and shoot) samples were collected at the stage of low tide in four seasons.
Don rhizomes had more potent anthelmintic activity with reference to the standard drug albendazole.
This study will be the first one to examine the effect of ethanolic extract of Curcuma longa rhizome on growth and total ergosterol content of yeast cells.
Hops are planted by burying sections of their rhizomes. When you are ready to plant, dig a basketball-sized hole to receive the rhizome.
Bearded irises should be watered after transplanting and during extreme drought, but too much water can lead to rhizome rot Bearded irises can survive beyond the sprinkler system.
one month intervals to exploit vegetation regrowing from rhizomes; no releases were made in Sep 2011 and Mar 2012 as no regrowth was apparent.