What is rhizoid?
rhizoid, called derived from the Latin prefix rhizo- for "root", in fact there is no root. Rhizoids are short, thin fibers that anchor certain types of plants and absorb water and nutrients from the plant environment. Rhizoids, although not technically root, act as a root system for plants that lack the traditional root system.
The real root of the plant is vascular. It has hollow tubes for water and nutrient transmission to various parts of the plant, such as its leaves where they are metabolized for growth. Xylem carries water and bears nutrients. Even most multicellular rhizoids are relatively undifferentiated by individual cells connected to the end. Cell membranes are porous, so water and nutrients can move from the cell to the adjacent cell. Like the tangled mass of silk white hair, rhizoids can combine the plant with its substrate, be it soil, solid rock or other material in which it grows. ScopeThe sound surface of many strands of hair effectively absorbs water and melted minerals.
liver rhizoids are very long unicellular structures. MOSS rhizoids are multicellular and some mosses can have a deep and extensive rhizoidal system. Rhizoid most mosses cannot directly absorb water. Rather, it transports water surface capillary effect. Some fungal rhizoids exclude digestive enzymes that absorb the resulting organic material of their host.
rhizoids are also essential for the class of vascular plants without seeds, such as ferns, during the gametophyte phase, where their reproductive cells have one set of genetic chromesomems. The young plant survives due to its rhizoids until the fertilized egg begins to develop a vascular system that includes real roots. Then enters the sporophyte stage when reproductive cells contain a complete set of chromosomes inE spores that are released into the wind. Moss also spreads asexually during its stages of sporophyte. Fern and mosses have only one parent.
rhizoids are supported by primitive plants and are not found in most vascular plants that are sexually reproduced, so it is generally believed that rhizoid is early development of plant root. Algae and other plants in the liquid medium could develop specialized cells designed to absorb water and nutrients, while other cells evolved to devote themselves to sunlight. Earth life has become another logical step. The whipped of fern, which resembles fossilized plants of the ancient Cambrian period of the country, has a vascular system, but no roots or leaves - only rhizoids - for sustain it.
The term rhizoid is sometimes used freely to define "root hairs", singular strands, which are the extension of special cells creating hair on the outer layer of the roots of the vascular plant. Both are trichomes, any hair isMen pendants or plant growth. Both also have almost the same functions.
rhizoid must not be confused with a rhizome. Rhizomes, also called rootstocks, are nodes along the underground stem of certain plants, from which a new root system and a stem shoot can be formed. Cirise are an example of plants that can spread with rhizomes.
The term "rhizoid" also has other meanings in scientific use. It came to the description of any fibrous root structure with fractal branches, such as the way some colonies of bacteria grow. It is also used to describe the structures of a cell or organism that allow it to anchor or stick to their environment.