ACS-BNØØ5-8 - InVigor™ canola | BCH-LMO-SCBD-14759 | Living Modified Organism | Biosafety Clearing-House

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Living Modified Organism (LMO)

Decisions on the LMO Risk Assessments  
last updated: 04 Apr 2013
Living Modified Organism identity
The image below identifies the LMO through its unique identifier, trade name and a link to this page of the BCH. Click on it to download a larger image on your computer. For help on how to use it go to the LMO quick-links page.
InVigor™ canola
EN
MS8
ACS-BNØØ5-8
Canola with male-sterility system displaying glufosinate herbicide tolerance. Contains the barnase gene from Bacillus amyloliquefaciens and the bar gene encoding phosphinothricin N-acetyltransferase from Streptomyces hygroscopicus.
EN
The term “Recipient organism” refers to an organism (either already modified or non-modified) that was subjected to genetic modification, whereas “Parental organisms” refers to those that were involved in cross breeding or cell fusion.
EN
Characteristics of the modification process
pTHW107
EN
  • Agrobacterium-mediated DNA transfer
Some of these genetic elements may be present as fragments or truncated forms. Please see notes below, where applicable.
On the N-terminal  two codons of the wild type bar coding region have been substituted for the codons ATG and GAC.

Southern blot and PCR analysis indicated that a single intact copy of the transformation cassette was integrated into the host genome.
EN
LMO characteristics
EN
  • Food
  • Feed
Additional Information
The transgenic MS8 plants do not produce viable pollen grains and cannot self-pollinate. In order to restore fertility in the hybrid progeny, line MS8 must be pollinated by a modified plant containing a fertility restorer gene. The resultant hybrid seed derived from the cross generates hybrid plants that produce pollen and are completely fertile.

The male-sterile trait was introduced in MS1 by inserting the barnase gene, isolated from Bacillus amyloliquefaciens, a common soil bacterium that is frequently used as a source for industrial enzymes. The barnase gene encodes for a ribonuclease enzyme (RNAse) that is expressed only in the tapetum cells of the pollen sac during anther development. The RNAse affects RNA production, disrupting normal cell functioning and arresting early anther development, thus leading to male sterility.

MS8 was also engineered to express tolerance to glufosinate ammonium, the active ingredient in phosphinothricin herbicides (Basta®, Rely®, Finale®, and Liberty®). Glufosinate chemically resembles the amino acid glutamate and acts to inhibit an enzyme, called glutamine synthetase, which is involved in the synthesis of glutamine. Essentially, glufosinate acts enough like glutamate, the molecule used by glutamine synthetase to make glutamine, that it blocks the enzyme's usual activity. Glutamine synthetase is also involved in ammonia detoxification. The action of glufosinate results in reduced glutamine levels and a corresponding increase in concentrations of ammonia in plant tissues, leading to cell membrane disruption and cessation of photosynthesis resulting in plant withering and death.
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