A hydathode is a type of tissue in leaves, usually more advanced plant species, that permits the release of water through pores in the epidermis or margin of leaves. They probably evolved from modified stomata. It is involved in guttation, where water is released from the top in order to transport the nutrients in the water from the roots to the leaves. Hydathodes are connected to the plant vascular system by a vascular bundle. Biological tissue is any substance made up of cells that perform a similar function within an organism. ... The leaves of a Beech tree A leaf with laminar structure and pinnate venation In botany, a leaf is an above-ground plant organ specialized for photosynthesis. ... A pore, in general, is some form of opening, usually very small. ... The epidermis is the outer multi-layered group of cells covering the leaf and young tissues of a plant. ... This is not about surgically created bowel openings; see stoma (medicine) In botany, a stoma (also stomate; plural stomata) is a tiny opening or pore, found mostly on the undersurface of a plant leaf, and used for gas exchange. ... Guttation is the appearance of drops of water on the leaves of some vascular plants, such as grasses. ... ROOT is an object-oriented software package developed by CERN. It was originally designed for particle physics data analysis and contains several features specific to this field, but it is also commonly used in other applications such as astronomy and data mining. ...
Transpiration is the evaporation of water from aerial parts of plants, especially leaves but also stems, flowers and fruits. ... It has been suggested that Vessel element be merged into this article or section. ... Divisions Non-seed-bearing plants Equisetophyta Lycopodiophyta Psilotophyta Pteridophyta Superdivision Spermatophyta Pinophyta Cycadophyta Ginkgophyta Gnetophyta Magnoliophyta The vascular plants are those plants that have specialized cells for conducting water and sap within their tissues, including the flowering plants, conifers and other gymnosperms, but not mosses, algae, and the like (nonvascular...
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