% Leaf size ** Macrophyll 14 10.14 0 0 Mesophyll
81 58.70 30 56.60 Microphyll 41 29.71 23 43.40 Nanophyll 2 1.45 0 0 Leaf type Compound.
Closure of stomata in plants results in a restriction to C[O.sub.2] entry in leaf mesophyll
cells, which may increase the susceptibility to photochemical damage because the reduction in C[O.sub.2] assimilation rate causes excessive light energy in the photosystem II (Silva et al., 2010).
The sucrose available for exporting from mesophyll
cells is transported through the phloem to the sink organs, where it can be stored as starch in amyloplasts or converted to hexoses (LEMOINE et al., 2013) by invertase (acidic and neutral isoforms) and sucrose synthase (susy) enzymes (STURM; TANG, 1999; WINTER; HUBER, 2000; WELHAM et al., 2009).
The leaf size spectra was dominated by microphyll with 31 (39.74%) species followed by mesophyll
(17 sp., 21.79%), nanophyll 14 (17.94%), macrophyll 6 (7.69%), leptophyll 5 (6.41%), megaphyll 2 (2.56%) and one (1.28%) species was aphyllous (Table 2, Fig.
After removal of mesophyll
tissues, pieces of epidermis were obtained and then dehydrated in an alcohol series and stained with astrablau-safranin (JENSEN, 1962) and then assembled into semi-permanents slides.
Shading-induced changes in the leaf mesophyll
of plants of different functional types.
In cross section, they are hypostomatic, with a uniseriate epidermis and mesophyll
comprising two layers of palisade parenchyma and about nine layers of spongy parenchyma.
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.
Damage is produced when caterpillars consume the foliar mesophyll
(including the associated palisade and laconic parenchyma as well as conducting vessels), thereby reducing the production and conduction of photoassimilates.
occurred in bundles along the periphery of the leaf and were bordered by sclerenchyma girders (Figs 2 and 3) of mesophyll
origin (Rudall and Chase 1996).
is composed of 3-4 layers of palisade parenchyma cells under the upper epidermis and spongy parenchyma cells with wide intercellular spaces.
Reaction to phytotoxins in a potato population from mesophyll