Leghemoglobin


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Leghemoglobin

 

a red iron-containing protein, similar in a number of properties to the hemoglobin of blood, that forms in the root nodules of actively nitrogen-fixing leguminous plants of the genus Leguminosae.

Leghemoglobin is a product of the symbiosis of two organisms: it consists of a heme synthesized by nodule bacteria and a globin formed by the cells of a higher plant. Leghemoglobin is destroyed when the nodules lose their capacity for symbiotic nitrogen fixation. Leghemoglobin was isolated in 1939 from the nodules of horse beans. It was obtained in crystalline form in 1959 from soy nodules. Like other hemoproteins, leghemoglobin regulates the oxygen regime in the nodule.

REFERENCES

Zhiznevskaia, G. Ia. Med’, molibden i zhelezo v azotnom obmene bobovykh rastenii Moscow, 1972.
Kretovich, V. L. Obmen azota v rasteniiakh. Moscow, 1972. [14–7264]
References in periodicals archive ?
The company also confirmed it plans to sell the Impossible Burger at grocery stores beginning in September after the Food and Drug Administration amended its rules to call the use of soy leghemoglobin safe as a color additive in imitation beef.
The Impossible Burger includes an ingredient from soybeans called leghemoglobin, which is a protein that is chemically bound to a non-protein molecule called heme that gives leghemoglobin (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC177968/) its blood red color .
The patty, which contains no meat, is made using an ingredient called soya leghemoglobin, better known as Heme, a protein found in meat that gives the burger its texture and taste.
In 2015, the US Food and Drug Administration found there was not enough evidence to establish the safety of soy leghemoglobin - the form of heme used - for consumption.
Likewise, the highest contents of iron were observed in the leaves of the seedlings in T4, T5 and T6 (Table 3), due to the fact that it activates enzymes and participates in the photosynthetic process, as the leghemoglobin (Taiz & Zeiger, 2013).
After ten weeks in a bacteriologically controlled chamber, this test shows the ability of isolates T8, T18, M3, M4 and M5 to form nodules (two to six) on the roots of the legume PhaseoluscoccineusPhaseoluscoccineus 2 to 6mm generally shaped grape cluster, whose white color, Hawevre the activity of the nodule is indicated by red or pink color that is explained by the presence of leghemoglobin, a hemoprotein fixing of oxygen required in the nitrogen fixation [21].
Low levels of ferredoxin, ATP and leghemoglobin contribute to limited N2 fixation of peas (Pisum sativum L.) and alfalfa (Medicago sativa L.) under S deficiency conditions.
So, the flow of oxygen that is available to bacteroids is only limited by the amount, distribution, and state of the leghemoglobin in the cytoplasm of the infected host plant cells [32].
Fe is required for the functioning of a range of enzymes, especially those involved in oxidation and reduction processes, for synthesis of the porphyrin ring (chlorophyll and heme biosynthesis), reduction of nitrite and sulphate, and [N.sub.2]-fixation (as part of leghemoglobin) [35].
[28], high cadmium concentration or salt stress resulted in oxidative stress with increased thiobarbituric acid reactive substances content and decreased leghemoglobin level and, consequently, decreased SNA.
Interdependence and nodule specificity of cis-acting regulatory elements in the soybean leghemoglobin lbc3 and N23 gene promoters.