Linked Life Data

15630624

Source:http://linkedlifedata.com/resource/pubmed/id/15630624

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2005-1-4
pubmed:abstractText
We have constructed an African cassava mosaic virus (ACMV) based gene-silencing vector as a reverse genetics tool for gene function analysis in cassava. The vector carrying a fragment from the Nicotiana tabacum sulfur gene (su), encoding one unit of the chloroplast enzyme magnesium chelatase, was used to induce the silencing of the cassava orthologous gene resulting in yellow-white spots characteristic of the inhibition of su expression. This result suggests that well developed sequence databases from model plants like Arabidopsis thaliana, Nicotiana benthamiana, N. tabacum, Lycopersicon esculentum and others could be used as a major source of information and sequences for functional genomics in cassava. Furthermore, a fragment of the cassava CYP79D2 endogenous gene, sharing 89% homology with CYP79D1 endogenous gene was inserted into the ACMV vector. The resultant vector was inducing the down regulation of the expression of these two genes which catalyze the first-dedicated step in the synthesis of linamarin, the major cyanogenic glycoside in cassava. At 21 days post-inoculation (dpi), a 76% reduction of linamarin content was observed in silenced leaves. Using transgenic plants expressing antisense RNA of CYP79D1 and CYP79D2, Siritunga and Sayre (2003) obtained several lines with a reduction level varying from 60% to 94%. This result provides the first example of direct comparison of the efficiency of a virus-induced gene silencing (VIGS) system and the transgenic approach for suppression of a biosynthetic pathway. The ACMV VIGS system will certainly be a complement and in some cases an alternative to the transgenic approach, for gene discovery and gene function analysis in cassava.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0167-4412
pubmed:author
pubmed:issnType
Print
pubmed:volume
56
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
613-24
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
A geminivirus-induced gene silencing system for gene function validation in cassava.
pubmed:affiliation
Donald Danforth Plant Science Center (DDPSC), 975 N Warson Road, St Louis, MO, 63121, USA.
pubmed:publicationType
Journal Article