Chitin biodegradation and wound healing in tree bark tissues |
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Authors: | Shigehiro Hirano Shuntaro Kitaura Nozomi Sasaki Hiroaki Sakaguchi Masafumi Sugiyama Kunihiko Hashimoto Akira Tanatani |
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Institution: | (1) Chitin/Chitosan R&D Room, 445-Sakuradani, 680 Tottori, Japan;(2) Department of Agricultural Biochemistry and Biotechnology, Tottori University, 680 Tottori, Japan;(3) Nishikawa Rubber Co., Ltd., 733 Hiroshima, Japan |
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Abstract: | Chitin biodegradation and wounded bark tissue healing were demonstrated in several evergreen and deciduous trees by dressing with a sheet of chitin-containing films or sponges. Chitinase activities in the tree bark tissues around the wounds were enhanced by this treatment up to four times those of the untreated wounds. Significant seasonal changes of chitinase activities were observed with the bark and leaf tissues of deciduous trees, but few with those of evergreen trees. A sheet of chitin films implanted or dressed in the tree bark tissues was biodegraded within 4 to 24 weeks after implantation and was assimilated into the wounded bark tissues, resulting in the stimulation of the wounded bark tissue healing. |
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Keywords: | Chitinase chitin biodegradation chitin film tree wounded bark tissue healing |
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