Current Science

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Exudates are a complex mixture of organic compounds that ooze out of plants through pores, or as a result of injury/wound. These products are commonly called as 'sap' and are rich in carbon and hydrogen atoms. A flow of viscous liquid or bleeding from the underlying tissues (when living) of the bark, consists largely of gum, resin or latex, depending on the tree species. These plant products have been collected since about 3000 BC, during the Egyptian civilization from Acacia.
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