The process of assimilation depends upon this breathing process and it is therefore evident that when the stomata are clogged as may occur where a tree is subjected to smoke or dust, the life processes of the tree will be interfered with.
The same injurious effect results when the stomata of the roots are interfered with.
The apophysis, which may be a more or less distinct region, usually bears stomata and is the main organ of assimilation.
Stomata are present on the wall of the small capsule.
The wall of the capsule is several layers of cells thick, and since the epidermis contains functional stomata and the underlying cells possess chlorophyll it is capable of assimilation.
Through these stomata fluids and other materials present in the body-cavity can be removed into the lymph spaces.
The stomata are surrounded by a special layer of cubical and granular cells.
Leaves abruptly contracted at base, long-pointed, with pale bands of stomata on the lower surface on each side of the midveins; fruit drupe-like.
In the leaves of many grasses stomata are found in both the upper and the lower epidermis and they are confined to the lower epidermis in a few grasses only.
The stomata occur in regular rows between the vascular bundles and they are quite characteristic of grasses.
Growing under water, only accidentally or in very dry seasons out of water; leaves without stomata (except in forms of n.
Arnold represents the most strenuous advocates of the stomata theory, according to which the leucocytes pass through canals normally existing in the wall.
The prevailing views at the present time are in favor of the artificial nature of the stomataand pores in the walls of the blood-vessels.
The wide stomata upon the abdominal surface of the diaphragm allows the facile entrance of the organisms into its lymphatics.
To meet the functional conditions, both sides of the compass leaves are almost equally provided with palisade cells for food formation and stomata for transpiration.
A, B, Section of Leaf of Potato with sporangiophores of Phytophthora infestans passing through the stomata D, on the under surface of the leaf.
Lambertiana is recognized by its long cone and by the constant dorsal stomata of its leaves.
The stomata of Pine leaves are depressed below the surface and interrupt the continuity of epiderm and hypoderm.
In several species of the Soft Pines the longitudinal lines of stomata are very conspicuous from the white bloom which modifies materially the general color of the foliage.
In certain plants, the epidermis is imbued with flint or sil´ica; so that even when burnt to an ash the stomata are still quite distinct.
Stomata are most numerous on the under surface of leaves; they are entirely absent in plants growing under water, and in most of the lower plants.
This arises from the absence of stomata and intercellular passages containing air; for the air in these passages of leaves and petals contributes greatly to the production of the brightness of their colours.
The structure of roots is very similar to that of stems; there is, however, no distinct pith, nor are there stomata on the epidermis; and the vessels are replaced by ducts.
What is here said with regard to stomata applies to all the more recondite matters connected with plant structure.
A stage further is attained in those fungi which enter the stomata and live in the intercellular spaces--e.
For instance, the stomata open and close to different extents according to the conditions of light and moisture, and this affects the whole mechanism of transpiration especially, and therefore the supplies of water and mineral salts.
These raw materials are soil water, which is passed up through the bundles of tubes into the veins of the leaf from the roots, and carbon dioxide, which is taken in through the stomata or pores, which dot the under surface of the leaf.
The stomata also tend to close under some conditions, thus helping to prevent evaporation.
The gradual evaporation of water through the stomata of the leaves cools the atmosphere, and this tends to precipitate the moisture in the air.
Study of the leaf in cross section shows that these stomata open directly into air chambers which penetrate between and around the loosely arranged cells composing the underpart of the leaf.
A plant takes in oxygen largely through thestomata of the leaves, to a less extent through the lenticels or breathing holes in the stem, and through the roots.
The carbon dioxide is taken in through the stomata and reaches the green cells by way of the intercellular spaces and by osmosis from cell to cell.
In the White Lily the stomata are so remarkably large that they may be seen by a simple microscope of moderate power, and may be discerned even by a good hand lens.
The Carolina hemlock's leaves have more rows of stomata and therefore are a little whiter on the under side.
The spots are stomata (mouths), and are parts of the chemical laboratory which carries on the tree's living processes.
They are green and lustrous above and silver white below, the whiteness due to stomata on their undersides.
The tissue is often raised above the veins, forming longitudinal ridges, generally on the upper face; the stomata are in lines in the intervening furrows.
The rolling up acts as a protection from too great loss of water, the exposed surface being specially protected to this end by a strong cuticle, the majority or all of the stomata occurring on the protected surface.
The suggestion is made that the stomata are blocked by the Bordeaux mixture, so that less air diffuses into the intercellular spaces and less carbon dioxide comes into contact with the absorptive surfaces.
But the effect produced on the tree is not only unsightly, from the sooty blackness, but also injurious, from the choking-up of the stomata both by the honeydew and the fungus.
Stomata on both faces, sunk, small and more difficult to see than in Digraphis, where the epidermal cells are plane walled, or nearly so.
Stomata on the flanks of the ridges, and few in number.
Stomata on both faces, but no hairs or thick cuticle.
Elymus is very like Psamma, but has a few stomatabelow and the sub-epidermal sclerenchyma is not continuous (see Fig.
Psamma, but the ridges are much lower, and there are a few stomata on the under surface (Fig.
The epidermal cell-walls are sinuous, thestomata protected--e.
Stomata on flanks of ridges only, and few motor-cells between (Fig.
A few coarse hairs both above and below, and stomata on both faces.
There are stomata below, but fewer than on the upper surface.
Nardus has some of the bands devoid of stomata, but abounding in short cells, whereas others (above) have stomata throughout.
The stomata or breathing holes, moreover, which in the leaves of most trees are confined to the under surface, are in this species nearly equally numerous on both.
These stomata are so small that there are millions on a single leaf, and on plants growing in dry countries, such as the Evergreen Oak, Oleander, etc.
A delicate strip of horn was fixed to a little block of cork and placed on a leaf, and to my delight showed the stomata to be open by violently curving upwards.
When, however, the same trial is made on the upper surface of a leaf, where stomata do not occur, no such change occurs.
The stomata in fact are the arbiters of what shall pass in or out of the body of the leaf; they are the gate-keepers who regulate both export and import.
The result is that a current of air is drawn through thestomata into the leaf, and then out of the leaf into the cavity of the porometer.
The instrument is not of course accurately quantitative, but it does at least show whether the stomata are nearly shut, moderately open, or widely so.
The Porometer] The microscopical inspection of stomatais not a completely satisfactory method of discovering to what degree they are open.
This difference may be accounted for by the closure of the stomata at night, a phenomenon unknown to Hales.
The rate of this current is an index of the degree to which the stomata are open.
A dry piece of this material, applied with proper precaution to the stomata-bearing surface of a leaf, rapidly changes to pink if the stomata are open.
The epidermis is continuous except where stomata or spaces bounded by specialized cells communicate with intercellular spaces in the interior of the leaf.
The stomataare delicately balanced valves, exceedingly sensitive to external influences.
It is also through the stomata that the water which is drawn from the soil by the roots through the stems is evaporated into the air.
It is through the stomata that the gases of the air enter the plant through which the discarded oxygen returns to the atmosphere.
The stomata or breathing-pores are so constructed that they may open and close very readily.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "stomata" in a variety of sentences. We hope that you will now be able to make sentences using this word.
