NGORAN Kouakou Desire, NGORAN Ahou Regine epouse Bla
, Yapo Sopie Edwige Salome
Achi Laurent and KOUAKOU Tanoh Hilaire ,Cote divoire
This paper aims to stimulate the polyphenols accumulation in cotton by MeJA and
oligossacharide fraction from FOV to increase protection to Fusarium wilt. To do this, cotton
plants were treated with different concentrations of fungal fractions and different concentrations
of MeJA. Leaves were removed and the polyphenols content was determinate. The
concentrations of elicitors which stimulated more the polyphenols production were retained.
Their effectiveness time on polyphenols production in cotton leaves after application was
evaluated. The results revealed that the oligosaccharide fraction 11 (10 %) allowed a large
polyphenols accumulation as MeJA. It has a shelf life of 45 days after application while that of 5
mM MeJA is 30 days. The results suggest that a natural molecule such as oligosaccharides could
be considered as a treatment to increase the resistance of cotton FOV. However, it would be
necessary to apply a second application 45 days after the first to maintain polyphenols
production at a high level. This article mainly highlights the use of elicitors such as fungal
oligosaccharide aimed at limiting chemical control in cotton culture.