| In vitro: |
| Phytochemistry. 2002 Jul;60(5):461-6. | | Immunohistochemical localization of agatharesinol, a heartwood norlignan, in Cryptomeria japonica.[Pubmed: 12052511] |
METHODS AND RESULTS:
Localization of a heartwood norlignan, agatharesinol, in Sugi (Japanese cedar, Cryptomeria japonica D. Don, Taxodiaceae) was investigated by immunohistochemistry. Immuno light microscopy showed that the contents of ray parenchyma cells were immunostained in heartwood but not in sapwood. The staining of the heartwood tissue was competitively inhibited by agatharesinol but not by other Sugi heartwood extractives, and was, furthermore, markedly reduced by pre-extraction of the tissue with MeOH. These results indicated that the staining can be ascribed to the immunolabeling of agatharesinol in situ. The accumulations over the inner surface of some tracheid cell walls adjacent to the ray parenchyma cells were also immunolabeled, while the contents in axial parenchyma cells were not.
CONCLUSIONS:
In conclusion, agatharesinol was localized in the ray parenchyma cells in Sugi heartwood, and differences between the chemical structure of the contents of ray and axial parenchyma cells were also suggested. |
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