After 15-20 min, it is possible to observe a cone-shaped callose thickening surrounding the perforation region of the outer periclinal
wall of the epidermal cell.
For the leaves and stems, the following parameters were considered: cuticle thickness in the adaxial surface; height of epidermal cells and thickness of the outer periclinal
external walls of both leaf sides; mesophyll thickness; number and distribution of secretory ducts in the ground parenchyma of the midrib; midrib height and width; internode diameter; number of cell layers and thickness of the cortex; number of ducts in the cortex; total stem area; and total area of the vascular cylinder.
Spiral cells with external thickened anticlinal walls and thin periclinal
After the examination of each species, measurements were done forseed shape, color, size, epidermal cell shape, anticlinal cell wall, periclinal
No entanto, embora possa nao ser significativo para o orgao folha como um todo, e conhecido que algumas plantas sob estresse, inclusive hidrico, possam aumentar a espessura da parede periclinal
externa da epiderme e cuticula (ROCAS; SCARANO; BARROS, 2001; WALDHOFF, 2003), provavelmente como uma forma de reduzir a transpiracao cuticular (LARCHER, 2000).
The druses are projected through the external periclinal
wall of the epidermis, giving the leaf a glandular appearance in the SEM (Figure 2K).
In the cross-section, epidermis is one-layered and cells with a thin and flat outer periclinal
wall occur on both surfaces.
The primary parietal cells divided repeatedly through periclinal
and anticlinal divisions to form the subepidermal endothecium and two middle layers (Fig.
The Jurassic periclinal
closure of the Aralar anticline has a complicated litho-stratigraphic sequence with various types of limestone, marl, calcareous sandstone, siliceous and micro-conglomeratic sandstone, conglomerates and lutite.