Secretory Tissues In Plants Pdf

Nectar is exuded through the walls and exposed on the outer surface of the gland. The water flows through the xylem to its endings in the leaf and then through the intercellular spaces of the hydathode tissue toward the openings in the epidermis. You can change your ad preferences anytime. You just clipped your first slide!

Epithelial Connective Muscular Nervous. Clautriau G La localisation des alcaloides du Pavot.

Epidermal hairs of many plants are secretory or glandular. Like most websites we use cookies. Non-articulate latex ducts or latex cells Fig. These glands occur on leaf parts modified as insect-trapping structures.

These consist of thin walled, greatly elongated and much branched ducts containing a milky or yellowish colored juice known as latex. Personalised recommendations. Show related SlideShares at end.

Secretory Cells and Secretory Tissues. They may also act as translocatory tissues. On cool nights following sultry days water is found at the tips and margins of leaves of many plants in form of dew-drops.

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They do not form a network. The oil ducts of umbellifers, though localised and limited in extent, are also formed in the same manner.

Anatomy of Hevea brasiliensis. Those present on the rim of the pitcher of Nepenthes which really lure the poor insects, and those occurring on the stipules of Vicia spp. Mac Laren, London Google Scholar. Sperlich A Das trophische Parenchym. Sassen M Breakdown of the plant cell wall during the cell fusion process.

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It is interesting to note that the nature of duct does not bear any relation with the systematic position of plants. Latex is usually a milky, often yellowish or watery fluid, which is readily exuded when the plants containing it are injured.

Sandeep Nachhola at Business. Resin ducts are canals lined with secretory cells that release resins into the canal.

Such ducts may be seen, for example, in various parts of the plant of the carrot family Umbelliferae. Locke ed Cellular membranes in development. The substances may be at once exuded from the seats of formation as in nectaries, or they may remain stored in some cavity inside. In some cases the cells forming the glands are columnar or papillose ones Fig.

Secretory Cells and Secretory Tissues

Development, ultrastructure and secretion. Name your project Please enter project name. Visibility Others can see my Clipboard. Every drop marks the location of a hydathode through which water has come out.

Top Menu BiologyDiscussion. You are claiming these items, please select your author name in each record. In others the materials formed remain stored up in the cells to be released only after the breakdown of the cells. Strictly speaking, such hydathodes are not glands because they are passive with regard to the flow of water. So it is a case of extracellular digestion.

Buvat R, Robert G Vacuole formation in the actively growing root meristem of barley Hordeum sativum. The ducts containing essential oils and mucilage are the examples. They may occur as isolated patches in any part of the plant, or may form well-organized structures. It is an emulsion of various substances like proteins, sugars, enzymes, rubber, etc. So they are also called water-stomata or water- pores.

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Secretory cells crystal containing cells may die after deposition of the crystal or may be separated from living part of the protoplast B. The cells directly concerned with secretions like resins, essential oils, mucilage, business leadership books pdf latex and similar substances together constitute secretory or special tissues. Secretory Ducts And Latificers.

Secretory Tissues In Plants

Secretory tissues in plants ( edition)

If you would like to, you can learn more about the cookies we use. Cells or organizations of cells which produce a variety of secretions. Ruinen J Microscopy of the lutoids in Hevea latex.

The resin ducts are formed schizogenously and appear as tube-like bodies having a lining of small parenchyma cells with dense protoplast Fig. The cells belonging to the first type have rich cytoplasm and prominent nuclei, whereas those of the second type are large cells with well-developed cavity where the secretion remains stored up. Oil ducts are intercellular canals whose secretory cells produce oils or similar substances. Your products All Products. These pores or stomata differ from ordinary stomata of the leaves in a number of points, viz.

Mohammad Osman Mohammad at University of Mosul good subject for students. From Wikipedia, the free encyclopedia. Please select author name in each record! The secreted substance may remain deposited within the secretory cell itself or may be excreted, that is, released from the cell.

Latex occurs under pressure and exudes from the plant when the latter is cut. Fahn A The topography of the nectary in the flower and its phylogenetic trend. Laticifers are cells or systems of cells containing latex, a milky or clear, colored or colorless liquid.

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They secrete the sugary substance, nectar or honey, and thus attract the pollinating insects. Now customize the name of a clipboard to store your clips.