define nodules in plants

What does root nodules, plant mean? All higher plants show developmental plasticity in response to the availability of nitrogen (N) in the soil. The nodules do this in conjunction with a specific type of bacteria, of the genus Rhizobium. ‘Nitrogen-fixing bacteria in the root nodules of leguminous plants (such as peas and clover) take in nitrogen direct from the air and pass it on to the plant, both feeding the plant and enriching the soil.’ This fixing action has a two-fold effect. The first is making nitrogen available for the current crop. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia. What “fixing” means is that the nodules absorb nitrogen from the air and convert it into ammonia in a useable form (NH3) that the plants can readily take up for growth. Root Nodules, Plant (n.). A 6-inch or longer cutting is taken from the parent plant for rooting in the soil. ENOD40 , an early nodulin gene, is expressed following inoculation with Rhizobium meliloti or by adding R. meliloti -produced nodulation (Nod) factors or the plant hormone cytokinin to uninoculated roots. Basically, these bacteria form a symbiotic relationship with legume plants that helps the beans and peas get additional nutrients. We isolated two MsENOD40 clones, designated MsENOD40–1 and MsENOD40–2, with distinct promoters from an alfalfa ( Medicago sativa cv Chief) genomic library. Root nodule - Wikipedia. nodule [nod´ūl] a small node that is solid and can be detected by touch. The second is when the plants are tilled under after the harvest. 1. Many types of plants, both woody and herbaceous, can be propagated by stem cuttings, a process that yields a plant identical to its parent. Information and translations of root nodules, plant in the most comprehensive dictionary definitions resource on the web. Legume, also called pod, fruit of plants in the pea family ().Most legumes are dehiscent fruits that release their seeds by splitting open along two seams, though some, such as peanuts (Arachis hypogaea) and carobs (Ceratonia siliqua), do not naturally open.The fruits come in a variety of sizes and shapes; many, however, are long and narrow and bear their seeds in a single line. Meaning of root nodules, plant. Here, we tested whether plastic responses to internal [N] of legumes are altered by their symbionts. They appear as modified lateral roots with a terminal apical meristem, but with lateral vascular tissue. For successful rooting, cut immediately below … The nodule is a highly specialized organ [1].Two morphological types of nodules are known and they are determined by the plant host (Figure 10-1).The first type is called indeterminate and these nodules occur on clover and alfalfa, for example. Swelling on roots, especially of LEGUMES, which is often related to RHIZOBIUM infection functioning for NITROGEN FIXATIONRoot nodules may … Root nodules capture nitrogen from the air, convert it to ammonia, and then break that down into more usable forms for the plant. Nodule definition is - a small mass of rounded or irregular shape: such as. Albini's n's gray nodules of the size of small grains, sometimes seen on the free edges of the atrioventricular valves of infants; they are remains of fetal structures. The plants then develop nodules which house the bacteria. Root nodules are found on the roots of plants, primarily legumes, that form a symbiosis with nitrogen-fixing bacteria. How to use nodule in a sentence. Definition of root nodules, plant in the Definitions.net dictionary. These nodules help feed the plant and other surrounding plants. 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