Linked Life Data

16661094

Source:http://linkedlifedata.com/resource/pubmed/id/16661094

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2010-6-29
pubmed:abstractText
Comparative enzymic studies of sugar beet (Beta vulgaris L.) taproots and fibrous roots revealed differences in invertase (EC 3.2.1.26) and sucrose synthetase (EC 2.4.1.13) activity. Invertase activity of the two root forms differs with respect to specific activity, pH optimum, and enzyme solubility. Acid invertase (pH 4.5) in the taproot was restricted to the peripheral meristematic tissue which produces cells for both taproot and fibrous root growth. This finding supports the hypothesis that the enzyme regulates sucrose partitioning between the taproot and fibrous roots. A distinct alkaline invertase (pH 8.0) was detected in sucrose storage tissues of the taproot.The V(max) of taproot sucrose synthetase (sucrose cleavage reaction) was highest in the presence of UDP. However, the fibrous root enzyme had the highest V(max) with ADP as substrate. Differential nucleoside diphosphate substrate affinities may provide for compartmentation and separate regulation of sucrose cleavage and resultant hexose utilization in adjoining taproot and fibrous root tissues.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Dec
pubmed:issn
0032-0889
pubmed:author
pubmed:issnType
Print
pubmed:volume
64
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1070-3
pubmed:dateRevised
2010-9-14
pubmed:year
1979
pubmed:articleTitle
Comparative Enzymic Studies of Sucrose Metabolism in the Taproots and Fibrous Roots of Beta vulgaris L.
pubmed:affiliation
United States Department of Agriculture, Science and Education Administration, Agricultural Research, Light and Plant Growth Laboratory, Plant Physiology Institute, Beltsville, Maryland 20705.
pubmed:publicationType
Journal Article