Central cylinder exhibits parenchymatous pericycle
and four alternate strands of primary xylem and phloem (Figure 2A).
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.
One-seriated endodermis is visible around the vascular cylinder, followed by one or two layers of pericycle
cells (Figure 3).
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
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.