Le pneumatode chez Phoenix dactylifera L. I. Structure et ultrastructure

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Abstract
Phoenix dactylifera roots possess air-containing structures or pneumatodes. Their mode of formation and their structure are described. They are derived from a generative layer. Their most remarkable features include the abundance of crystal-containing plasts and the occurrence of wall outgrowths which are associated with an amorphous matrix in intercellular spaces of young aerenchymous regions. The crystals show a positive response to labelling reactions of carbohydrates and proteins. [Journal translation]

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