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 ?
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).
Low levels of ferredoxin, ATP and leghemoglobin contribute to limited N2 fixation of peas (Pisum sativum L.
The Fe activates enzymes and participates in oxidation-reduction reactions in homeoproteins (cytochromes, leghemoglobin, catalase, peroxidase and superoxide dismutase) and non-hemic proteins with F-S binding, such as ferredoxin and reductase enzymes, nitrogenase and sulfate reductase.
Interdependence and nodule specificity of cis-acting regulatory elements in the soybean leghemoglobin lbc3 and N23 gene promoters.
Targeting of the soybean leghemoglobin to tobacco chloroplasts: Effects on aerobic metabolism in transgenic plants.
US Patent # 8,021,695 B2: Personal Care Composition Containing Leghemoglobin
Upon dissection, active regions of nodules will be observed to contain a pink pigment, leghemoglobin, that is responsible for oxygen regulation in the nodule.
Another cluster of strains were ranked as partially-effective (PE), and those producing lower nodule tissue with no visible traces of leghemoglobin were classified as ineffective (I) in fixing nitrogen.
While a white nodule color indicates an early developmental block preceding leghemoglobin synthesis, a greenish and brown coloration can be treated as the premature degradation of the nodules (Kneen et al.
Leghemoglobin genes (lb) in legumes and their cDNAs have been the best-studied plant genes (Stroczycki & Logocki, 1995).