Abstract
Abstract The CO2 exchange characteristics and chlorophyll content of the pneumatophores of Avicennia marina (Forsk.) Vierh. var. resinifera (Forst.) Bakh. were examined. The results indicate that, in addition to their primary role in ventilation of the buried roots, the aerial roots have the ability to fix exogenous CO2 via photosynthesis. Consequently, during the day these organs are almost auto trophic in terms of carbon balance. When corrected for the respiration of non‐chlorophyllous tissue, they show photosynthetic rates comparable to those of many other woody plants.
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