Linked Life Data

2981046

Source:http://linkedlifedata.com/resource/pubmed/id/2981046

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1988-4-1
pubmed:abstractText
Our objectives were to identify substances produced by plant roots that might act as nutritional mediators of specific plant-bacterium relationships and to delineate the bacterial genes responsible for catabolizing these substances. We discovered new compounds, which we call calystegins, that have the characteristics of nutritional mediators. They were detected in only 3 of 105 species of higher plants examined: Calystegia sepium, Convolvulus arvensis (both of the Convolvulaceae family), and Atropa belladonna. Calystegins are abundant in organs in contact with the rhizosphere and are not found, or are observed only in small quantities, in aerial plant parts. Just as the synthesis of calystegins is infrequent in the plant kingdom, their catabolism is rare among rhizosphere bacteria that associate with plants and influence their growth. Of 42 such bacteria tested, only one (Rhizobium meliloti 41) was able to catabolize calystegins and use them as a sole source of carbon and nitrogen. The calystegin catabolism gene(s) (cac) in this strain is located on a self-transmissible plasmid (pRme41a), which is not essential to nitrogen-fixing symbiosis with legumes. We suggest that under natural conditions calystegins provide an exclusive carbon and nitrogen source to rhizosphere bacteria which are able to catabolize these compounds. Calystegins (and the corresponding microbial catabolic genes) might be used to analyze and possibly modify rhizosphere ecology.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-14775715, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-16347318, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-16592823, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-16593802, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-2987992, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-319201, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-36626, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-3738520, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-4217350, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-4945193, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-6256652, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-6690420, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-6744417, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-6949000, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-6949001, http://linkedlifedata.com/resource/pubmed/commentcorrection/2981046-7061401
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0021-9193
pubmed:author
pubmed:issnType
Print
pubmed:volume
170
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1153-61
pubmed:dateRevised
2010-9-9
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
A plasmid of Rhizobium meliloti 41 encodes catabolism of two compounds from root exudate of Calystegium sepium.
pubmed:affiliation
Laboratoire de Biologie de la Rhizosphère, Institut National de la Recherche Agronomique, Versailles, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't