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How chitosan oligosaccharide to induce plant resistance?

Posted by:bozhihuili    Published:2015-12-03 17:11

One of the most innovative approaches for controlling plant diseases is through the enhancement of the plant's 

own defence mechanisms (induced resistance), which would not involve the application of toxic compounds to 

plants. It has been well established for over 100 years, that plants can defend themselves; however, in the 

last 20 years, a significant progress in our knowledge on plant immunity, has provided the understanding 

required to allow induced resistance to be used in practice.


Chitosan oligosaccharide has been proven to be a plant elicitor which could induce plant defence responses. 

Firstly, Chitosan oligosaccharide is recognised by the receptor. After signal perception, the concentration ion 

flux alterations and reactive oxygens are changed. Theses changes trigger the signal transduction to regulate

the expression of defence genes and change metabolism leading to plant resistance. The plants that have 

been preventively treated with chitooligosaccharides activate their defence mechanisms early, which leads 

to a faster and more effective response when the pathogen and environment stress try to colonise the plant.




Chitooligosaccharide is a natural, non-toxic and biodegradable product, which does not leave any residues or 

affect the beneficial fauna. Chitooligosaccharide is a very useful tool for Integrated Pest Management (IPM), 

as it allows the reduction of the use of chemical plant protection products, thus contributing to a healthier 

and more sustainable agriculture. At the same time, chitooligosaccharide will facilitate plants' sale and, as a 

consequence, lead to higher profits.


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