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الأربعاء، 2 مايو 2012

The primary pigments in plants


The bacteriochlorophylls are some pigments photosynthetic found in several bacterial phototrophs . Are related to chlorophyll , which are the primary pigments in plants , algae and cyanobacteria . Groups containing bacteriochlorophyll conduct photosynthesis but do not produce oxygen . Using light wavelengths that are not absorbed by plants. The different groups contain different types of bacteriochlorophyll:
Bacteriochlorophyll a , purple bacteria , Chloracidobacterium thermophilum . 1
Bacteriochlorophyll b , purple bacteria .
Bacteriochlorophyll c , green sulfur bacteria , Chloroflexi , Chloracidobacterium thermophilum .
Bacteriochlorophyll d , green sulfur bacteria .
Bacteriochlorophyll e , green sulfur bacteria .
Bacteriochlorophyll g , heliobacteria .
The bacteriochlorophylls c and d are chlorins , with a ring pyrrole reduced , and the others are bacteriochlorins, with two.
Balausta is a fruit that comes from an inferior ovary, where the carpels are joined together and arranged on two floors. They have a pericarp hard, and the interior is divided into chambers by a thin tissue. The seeds have a fleshy outer part.
An example is the fruit of the pomegranate ( Punica granatum )
The salve is a plant secretion comprised of resin , aromatic acids , alcohols and esters , such as incense . The balms are often used as deodorizers and cleaners, as sometimes the mummies were covered with Egyptian mummification balms also was named embalmed.
The balms are solid, more or less viscous fluids on either a preponderance of their elements. Its color varies from quite dark usually yellow-brown to blackish brown. Owe their odor in part to contain volatile oil and sometimes exposed to benzoic acid for a long time outdoors, harden and make a resinous lose their odor resulting from the dispersion in the atmosphere of volatile oil. Are generally mixed in all proportions with alcohol, ether, and volatile fatty oils and are insoluble in water. By simple distillation I can be separated only a small part of the volatile oil contained therein. For all must distill with water, operation to be practiced on a large scale with turpentine to remove the essential oil of turpentine. All balms are born, either naturally or by incisions made ??to the effect of certain trees.
In botany , the band of Caspary is a differentiation of primary walls of the cells of the endoderm of the roots of plants, is a waterproof layer which extends suberin without continuity succession along the radial and transverse walls.
The Casparian band forms part of the wall, an infiltration is not a tank and each cell has its own band. When observing microscope , the band is dyed a different color than the rest of the wall, since it presents appetite deferens by safranin .
Its function is to seal the wall prevents the substances from entering the cells of the endoderm and exodermis. Moreover, the cells are bound together by the bands thus also preclude the passage of substances between them.
There are two types of inputs of substances:
Apoplastic pathway: substances enter by diffusion through the apoplast, and may reach the vascular cylinder, hence the Casparian band seals the water passage, and therefore substances that are in it.
Symplastic pathway: substances enter the symplast and disseminated by intermembrane transport.
In botany , a berry is the most common type of fruit fleshy simple, in which the entire wall of the ovary matures, usually in a pericarp edible . The ovary is always exceeded in these flowers , and having one or more carpels within a thin covering and fleshy interiors, the seeds embedded in a common meat that is simple or ovarian multicarpelado.
Examples of berries are grape and tomato , but many other common fruits botanically as berries are considered: the hesperidios as orange and lemon are berries modified, the persimmon , the eggplant , the guava , and pepper berries are considered as well.
In plant species with an inferior ovary, the floral tube can mature along with the ovary, creating an accessory fruit called false berry . Included in this category, the banana , the cucumber , the gourd , the melon , the gooseberry , the cranberry and melon among others.
Many berries are small, juicy, and a bright color that contrasts with its background to be more sensitive to animals that disperse helping to disperse the seeds of the plant.
In Spanish language berry is not the same as fruit of the forest . Care must be taken because in many other languages ??the same word refers to both concepts, such as the grapes are berries but no berries, the berries are not berries but berries, and currants are two types of fruit.

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