Chitosan and Derivatives as Activators of Plant Cells in Tissues and Seeds
Chitosan and its derivatives (O-carboxymethylchitosan, O-glycolchitosan, chitosan oligosaccharides, and low molecular weight chitosan) were tested for inducing plant chitinase and chitosanase activities and for increasing plant growth. Chitinase and chitosanase activities were widely distributed in plants, and especially high in their exo-tissues. These enzymes activities were increased up to 3.5-fold in the presence of low molecular weight chitosan (0.05%) in the callus formation of cabbage leaves on the Murashige-Skoog medium, and up to 3.0-fold in the germination stage of soybean and Japanese radish seeds coated with a thin membrane of low molecular weight chitosan. These coated Japanese radish seeds were cultivated in the field, and the yield of the radish plants was 7–13% higher than that of the uncoated seeds.
KeywordsCallus Formation Chitinase Activity Thin Membrane Murashige Skoog Radish Plant
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