Abstract
Anaerobic metabolism of different below ground plant parts of J. roemerianus and S. alterniflora in terms of dehydrogenase activity was significantly correlated with concentrations of adenosine triphosphate but not with energy charge. Energy charge was quite stable, ranging from 0·62 to 0·67 (mean 0·65) for S. alterniflora and 0·50 to 0·87 (mean of 0·69) for J. roemerianus. J. roemerianus rhizome tips were the most metabolically active tissue, followed by the buried colorless stem base and rhizome mid-section. Dead-looking rhizomes had some dehydrogenase activity. Roots of different sizes and rhizome bark were metabolically inert. Below ground stem base of S. alterniflora showed the same level of activity as J. roemerianus stem base. S. alterniflora rhizomes, however, showed at least an order of magnitude less activity than that of J. roemerianus.
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