The genetically modified maize has an altered growth characteristic
resulting from the introduction of a Gibberelin 20 Oxidase-1 gene
from Arabidopsis thaliana to increase levels of
gibberellic acid. The plants become significantly longer and more
slender without producing significantly more biomass. At the
cellular level, the plants produced more cellulose, lignin, and
cell wall residue.
Additionally the bar-gene from Streptomyces hygroscopicus
is present as a selectable marker gene. The gene encodes
phosphinotricin acetyl transferase enzyme (PAT), which acetylates
phosphinotricin, also known as glufosinate, the active ingredient
of herbicides such as Basta and Liberty.