UREASE DISTRIBUTION IN <i>SOJA MAX</i>

Granick, S.

doi:10.1104/pp.13.1.29

Cited by 15 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous work reported that maximum rates of in vivo activity in soybean cotyledons were obtained using high substrate concentrations, i.e. greater than 200 mM (Graniek 1939). This finding was also confirmed using ["C]urea leaf disk assays.…”

Section: Discussionsupporting

confidence: 74%

See 1 more Smart Citation

Soybean leaf urease: Comparison with seed urease

Kerr

Blevins

Rapp

et al. 1983

Physiologia Plantarum

View full text Add to dashboard Cite

Soybeans, Glycine max (L.) Merr., from ureides for transport of nitrogen from the root nodule to the shoot. The most direct routes for ureide utilization include the degradation of ureide‐derived urea to NH3 and CO2. Ureolytic activity was found in leaf disks of soybean and exhbited optimal activity at pH 7 in the presence of a high concentration of urea (250 mM). In vitro studies showed neither urea amidolyase nor urea dehydrogenase activity in soybean leaves and the ureolytic activity was characterized as urease. Several biochemical properties of soybean leaf urease were determined and compared to seed urease properties. Soybean leaf urease differed from that of seed in five ways: pH optima (5.25 and 8.75), apparent Km (0.8 mM), no inhibition by hydroxyurea, faster electrophoretic mobility and no cross‐reactivity with soybean seed urease antibodies. The data suggest that urease is the primary urea metabolizing enzyme present in soybean leaves. The properties of soybean leaf urease support the conclusion that a unique isozyme of urease is present in leaf tissue.

show abstract

Section: Discussionsupporting

confidence: 74%

“…Urease was found in soybean seeds and seedlings as early as 1909 (Takeuchi 1909). Subsequently ureolytic activity was found in all portions of soybean plants (Graniek 1939). Unfortunately, growth conditions were not completely described, atid so it is not known if the plants were nodulated and producing ureides.…”

Section: Introductionmentioning

confidence: 99%

Soybean leaf urease: Comparison with seed urease

Kerr

Blevins

Rapp

et al. 1983

Physiologia Plantarum

View full text Add to dashboard Cite

show abstract

“…But this decrease was less in Urea culture than in ammonia culture. In spite of the fact that urease activity in several plants generally decreases as they grow (22,23). the urease activity maintained an almost constant level in urea cultured plants during the eXI>Cri.…”

Section: Methodsmentioning

confidence: 99%

The inducible formation of urease in rice plants

Matsumoto

Yasuda

Kobayashi

et al. 1966

Soil Science and Plant Nutrition

View full text Add to dashboard Cite

“…required Ni 2+ for reasons not related to nitrogen metabolism (Van Baalen and O'Donnell, 1978). Urease is present in highest concentration in seeds where arginine concentration is higher than in vegetative tissues (Granick, 1938;Sehgal and Naylor, 1966). Reithel (1971) states, "until our knowledge of the ureases discloses biolog ical significance, the research on these enzymes will continue to be re stricted. "…”

Section: E Metabolism Of Ureamentioning

confidence: 99%

Arginine Synthesis, Proline Synthesis, and Related Processes

Thompson¹

1980

Amino Acids and Derivatives

View full text Add to dashboard Cite

UREASE DISTRIBUTION IN SOJA MAX

Cited by 15 publications

References 10 publications

Soybean leaf urease: Comparison with seed urease

Soybean leaf urease: Comparison with seed urease

The inducible formation of urease in rice plants

Arginine Synthesis, Proline Synthesis, and Related Processes

Contact Info

Product

Resources

About