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Related to pericycle: xylem, Medullary rays


A plant tissue characteristic of the roots, located between the endodermis and phloem.

[French péricycle, from Greek perikuklos, spherical : peri-, peri- + kuklos, circle; see cycle.]

per′i·cy′clic (-sī′klĭk, -sĭk′lĭk) adj.


(Botany) a layer of plant tissue beneath the endodermis: surrounds the conducting tissue in roots and certain stems
[C19: from Greek perikuklos]
pericyclic adj


(ˈpɛr əˌsaɪ kəl)

the cell layer of the stele in a plant, bounded by the endodermis and the phloem.
[1890–95; < Greek períkyklos. See peri-, cycle]
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References in periodicals archive ?
However, Haisig (1974) considers the site of root initiation to depend on whether the primordia are induced or preformed; such primordia may develop in the cambium, phloem, pericycle and cells adjacent to the bundles, where roots have most commonly been observed.
2001), this phytohormone activates the division of pericycle cells, acting on the initial stages of formation of the root primordium, directly influencing root development, which may have affected the mean increments in collar diameter and plant height observed in the present study.
The outline of both outer epidermis and pericycle were analyzed to obtain area (A), perimeter (P), maximum diameter (dmax) and minimum diameter (dmin).
in the manner : pericycle [right arrow] ATP [right arrow] xylem.
At the secondary root initiation stage, the pericycle cells are stimulated by a high auxin concentration and inhibited by elevated cytokinin and ethylene concentrations.
Weston 24 ++ + - 48 ++ + - 72 ++ + - 120 +++ ++ - Filipendula 1 ++ + - ulmaria Juss 24 ++ + - 48 +++ + - 72 +++ ++ + 120 +++ ++ + Artemisia 1 + - - pontica 24 + - - 48 ++ ++ - 72 ++ ++ - 120 + + - Species Time Endoderm Pericycle Vascular (h) bundles Fragaria viridis 1 - - - (Duch.
In leaves, AtSultr 2: 1 is expressed in the xylem parenchyma and phloem cells; but in the root it is expressed in xylem parenchyma and pericycle cells.
On cross section of 10 days barley roots at control sample from outside to inside: root hairs, epidermis, cortex parenchyma, endodermis, pericycle, tissue conductors and medulla were observed.
The young females then penetrate deeper into the cortex and may reach as deep as the pericycle.
Direct somatic embryogenesis from pericycle cells of broccoli (Brassica oleracea L.