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Roots (Zone of elongation (root hair zone (root hairs), Zone of…
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- The root cap is a type of tissue at the tip of a plant root. It is also called calyptra. Root caps contain statocytes which are involved in gravity perception in plants. If the cap is carefully removed the root will grow randomly. The root cap protects the growing tip in plant
- is a slimy substance that covers the root cap of the roots of plants. It is a highly hydrated polysaccharide, most likely a pectin, which is secreted from the outermost (epidermal) cells of the rootcap. Mucigel is formed in the Golgi bodies of such cells, and is secreted through the process of exocytosis.
- The zone of cell division is closest to the root tip and is made up of the actively-dividing cells of the root meristem, which contains the undifferentiated cells of the germinating plant. The zone of elongation is where the newly-formed cells increase in length, thereby lengthening the root.
- each of a large number of elongated microscopic outgrowths from the outer layer of cells in a root, absorbing moisture and nutrients from the soil.
- Root apical meristem is the region within the growing root containing meristematic cells. At the heart of the root apical meristem are the cells of the quiescent centre.
- A region in the apical meristem of a root where cell division proceeds very slowly or not at all, but the cells are capable of resuming meristematic activity should tissue surrounding them be damaged
- zone of cell maturation where the root cells differentiate into specialized cell types.
- passage cells ssage cells of the endodermis are important for the transfer of calcium and magnesium into the stele and thus into the transpiration stream.
- root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when transpiration is low during the day.
- such as carrots, beets, and sweet potatoes, are examples of roots that are specially modified for storage of starch and water. They usually grow underground as protection from plant-eating animals.
- Any of the modified roots that arise from the stem of certain plants and provide extra support. Such stems are usually tall and slender and the prop roots develop at successively higher levels as the stem elongates, as in the maize plant.
- are large, wide roots on all sides of a shallowly rooted tree. Typically, they are found in nutrient-poor tropical forest soils that may not be very deep. They prevent the tree from falling over (hence the name buttress) while also gathering more nutrients.
- These orchids are epiphytes that grow on other plants. To collect water, some epiphytic orchids dangle their roots in the air and absorb moisture directly from the atmosphere, from rain, and from water that drips off vegetation above it.
- These roots function in water and nutrient uptake. The second root form consists of contractile roots that function to adjust the depth of the bulb or corm in the soil. These thickened roots expand and contract to pull the bulb or corm down to its proper soil depth.
- a fungus which grows in association with the roots of a plant in a symbiotic or mildly pathogenic relationship.
- is a form of symbiotic relationship that occurs between a fungal symbiont and the roots of various plant species.
- hyphae penetrate the root cortex as far as the endodermis; they pass through the wall of the cortex cells but cannot pass through the Casparian strip.
*the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.
- initiates from a kink in a deformed root hair cell. Polar growth through the root hair cell is guided by transcellular cytoplasmic bridges.
- are found on the roots of plants, primarily legumes, that form a symbiosis with nitrogen-fixing bacteria. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia.
- a slender projection from the root of a parasitic plant, such as a dodder, or from the hyphae of a parasitic fungus, enabling the parasite to penetrate the tissues of its host and absorb nutrients from it.
- Once established, the young strangler figs begin sending aerial roots down to the ground, where they quickly dive into the soil and anchor themselves
