pericycle


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Related to pericycle: xylem, Medullary rays

pericycle

the layer of plant cells between the ENDODERMIS and the PHLOEM, consisting mainly of PARENCHYMA, which becomes meristematic to form lateral roots. See STEM and ROOT for diagrams.
References in periodicals archive ?
sativa roots were inhibited strongly, transverse growth was maintained regularly and was from outside to inside: root hairs, epidermis, cortex parenchyma, endodermis, pericycle, tissue conductors and parenchyma medulla.
The endoderm is not thickened and, in the central cylinder, the pericycle is composed of cells of varied size, possessing three xylems poles (Figure 8B).
A ring of endodermis and pericycle cells surrounds these vascular tissues.
This development begins at the pericycle as a pocket of meristem activity that quickly organizes into a new root meristem.
Research in other plants has led to the identification of genes involved in the development of root cap, pericycle, lateral roots, epidermis, cortex, elongation zone, and root apical meristem (Rost and Bryant, 1996).
Hyoscyamine 6[Beta]-hydrolase, an enzyme involved in tropane alkaloid biosynthesis, is localized at the pericycle of the root.
The pericycle, a set of sclerenchymatic fibers in two or three layers that involve the vascular cylinder, presented great thickness of the cell walls (Figure 1M, 1O).
They are called root-knot nematodes, because the resulting giant cells become multinucleate (up to greater than 100 nuclei) and are surrounded by cortical and pericycle cells that divide and proliferate resulting in the development of 'galls' or 'root knots' (Gheysen and Mitchum, 2011).
In the cortical fundamental meristem, a pro-endodermis is distinguishable, and pericycle and procambium cylinder are also evident in the primary root apex (Figure 2B).
In Ceiba pentanda and Ceiba speciosa stem, the pericycle is marked by strands of fibers situated at the outer periphery of the phloem groups, phloem strands usually stratified into fibrous and non fibrous zones where primary medullary rays present between them in triangular shape with inward apex whereas the phloem in Bombax ceiba forms a continuous ring.
Auxin induces cells in the pericycle and parenchyma to dedifferentiate and enter initial cell divisions.