Stimulation of some enzymes in rice (Oryza sativa L.) plants treated with a chitosan hydrolisate
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Abstract
through using of bioactive products is one of the most
ecological and dynamic ways to defend them from pathogen
attack. Among elicitors promoting this induction is hydrolisate
of chitosan, which was obtained in the Department of Crop
Physiology and Biochemistry from the National Institute of
Agricultural Sciences (INCA). This work determined the effect
of a hydrolisate of chitosan applied to seed on the stimulation
of some enzymes related with pathogenesis, such as PAL,
glucanase, chitinase and chitosanase in rice plants (var. J-104).
It was observed that with the application of this compound,
there was an induction of the activity of different enzymes.
The highest values of the activity of enzymes PAL and �?-1,3
glucanases were observed at the concentration of 500 mg.L-1
whereas in chitinase and chitosanase at the concentration of
100 mg.L-1. It was demonstrated that at lower concentrations
than 1 000 mg.L-1 a higher estimulation of the activity of
evaluated enzymes is obtained.
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