We propose to orient an embryo-in sagittal view-in such a way that the plumule is on the right of the root cap
(which is itself then situated on the left), or in other words, such that the dorsal part of the embryo is on the left and the frontal part on the right (Fig.
There is also a reduction in the size of the root cap
and derangement of the meristematic tissue, besides the formation of protoxylem and endoderm in regions close to the root apex with high contents of lignin (Miguel et al., 2010).
Furthermore, Barker and Pilbeam (2007) explained that Al can reduce root cell division; hence, it causes disruption of root cap
processes, inhibiting root elongation.
A more pronounced enlargement of cells is evident in the root protodermis, which is covered by the root cap
cells (Figure 2B).
The effects of aluminum on root cap
function and root development in Zea mays L.
With injury to the root cap
, the levels of cytokinin, which controls the root geotropic curvature, will be reduced and will induce gravitropic inversion (ALONI et al., 2006).
Further division at the distal end of the apical meristem gave rise to a root cap
consisting of three-four layers of cells that were more vacuolated than centrally located cells.
Auxin and Ethylene Interactions Control Mitotic Activity of the Quiescent Centre, Root Cap
Size, and Pattern of Cap Cell Differentiation in Maize.
Aluminum toxicity in roots: an investigation of spatial sensitivity and the role of the root cap
. Journal of Experimental Botany, Oxford, v.44, n.2, p.437-446, 1993.
Root mucilage is primarily produced by the root cap
(border) cells, is left behind as the root grows forward, and contains complex polysaccharides with charged carboxyl groups, neutral sugars, proteins, and phenolics, depending on species (Miki et al.
It is worth noting that the root cap
and the root tip region at the boundary of root cap
in all root tissue prints showed syr-oxidase activity.
The key parts of the root are the primary root, secondary root, root hairs, and root cap
. The two different classes of roots used to classify plants are plants with a tap root system and plants with a fibrous root system.