Thursday, January 1, 2015
Lower leaf (Cataphylle) are usually small and simply decorated, often scaly. In many cases, only the bottom sheet is formed. Usually they are not green. At the shoot axis they are below the leaf, hence the name. They are located at the beginning of base or the runner in woody plants are often referred to as Lower leaf bud scales at the lower end of annual drive (not all the trees bud scales, however, are low-sheets). Here abscission and low leaf area change periodically from each other (wholesale Galax leaves).
The bundles are popular mostly referred to as nerves or veins, both misleading term, since the bundles still have a circulatory function neither. There are three types of veins that have a systematic significance. In monocots. Here the main veins running along and parallel to each other. This provides the most smooth leaf margin of monocots.
The paper concludes with a degree outward tissue, the epidermis, from which consists of only one cell layer. The epidermis has outwards a water-impermeable cuticle layer of wax that prevents unregulated evaporation. The cells of epidermis generally have no chloroplast (the cell components, in which photosynthesis takes place).
Exceptions are the epidermis of hygro-, HELO and hydrophytes and partially shade leaf, but especially the guard cells of stomata (stomata), which always contain chloroplasts. The stomata serve the regulation of gas exchange, primarily of water vapor. After the distribution of stomata, a distinction (stomata on the underside of leaf, common type), (stomata on both leaf surfaces) and leaf (stomata on the leaf surface, z. B. With floating leaf).
In some families, the stipules are highly developed, as in pea family (such as the pea), the rose family and violet plants. You can either free (z. B. Vetches) or apparently the petiole be grown (roses).
Morphologically, a flower is a short shoot, the person sitting at this short shoot leaf are transformed into petals: The bracts are either configured differently than calyx (sepals) and petals (petals) or uniformly as tepals (tepals); inwardly follow the dust and the carpels.
The bundles are often located on the border between palisade and spongy parenchyma in upper spongy parenchyma. The structure resembles that of bundles in stem axis and is usually collateral. The bundles branch off from the stem axis and go through the leaf stalk without rotation in lamina over. As a result, the xylem to leaf surface, the phloem to lower leaf surface.
The shape of blade or flake: Specifies whether the sheet, for example, is round, elliptical, linear, kidney-shaped, etc. Leaf describes how leaf blade enters the petiole. Eg, heart-shaped, arrow-shaped. The spreading-Apex (peak), rounded, be sharp, dull, etc. From the Journal of plant leaf hump develops, it differentiates itself by a constriction in a wide proximal portion, the bottom sheet, and a narrow distal portion, the top sheet. Growth occurs only for a short time with the point. The tip is very early in their growth, the growth is by intercalary meristems or basal (untercalary growth).
The bundles are popular mostly referred to as nerves or veins, both misleading term, since the bundles still have a circulatory function neither. There are three types of veins that have a systematic significance. In monocots. Here the main veins running along and parallel to each other. This provides the most smooth leaf margin of monocots.
The paper concludes with a degree outward tissue, the epidermis, from which consists of only one cell layer. The epidermis has outwards a water-impermeable cuticle layer of wax that prevents unregulated evaporation. The cells of epidermis generally have no chloroplast (the cell components, in which photosynthesis takes place).
Exceptions are the epidermis of hygro-, HELO and hydrophytes and partially shade leaf, but especially the guard cells of stomata (stomata), which always contain chloroplasts. The stomata serve the regulation of gas exchange, primarily of water vapor. After the distribution of stomata, a distinction (stomata on the underside of leaf, common type), (stomata on both leaf surfaces) and leaf (stomata on the leaf surface, z. B. With floating leaf).
In some families, the stipules are highly developed, as in pea family (such as the pea), the rose family and violet plants. You can either free (z. B. Vetches) or apparently the petiole be grown (roses).
Morphologically, a flower is a short shoot, the person sitting at this short shoot leaf are transformed into petals: The bracts are either configured differently than calyx (sepals) and petals (petals) or uniformly as tepals (tepals); inwardly follow the dust and the carpels.
The bundles are often located on the border between palisade and spongy parenchyma in upper spongy parenchyma. The structure resembles that of bundles in stem axis and is usually collateral. The bundles branch off from the stem axis and go through the leaf stalk without rotation in lamina over. As a result, the xylem to leaf surface, the phloem to lower leaf surface.
The shape of blade or flake: Specifies whether the sheet, for example, is round, elliptical, linear, kidney-shaped, etc. Leaf describes how leaf blade enters the petiole. Eg, heart-shaped, arrow-shaped. The spreading-Apex (peak), rounded, be sharp, dull, etc. From the Journal of plant leaf hump develops, it differentiates itself by a constriction in a wide proximal portion, the bottom sheet, and a narrow distal portion, the top sheet. Growth occurs only for a short time with the point. The tip is very early in their growth, the growth is by intercalary meristems or basal (untercalary growth).
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