Elevated atmospheric partial pressure of carbon dioxide and dry matter production of konjak (Amorphophallus konjac K. Koch).

Konjak (Amorphophallus konjac K. Koch) was grown under normal (350 μbar) or enriched (700 μbar) CO2 partial pressure in glasshouses kept at 33/26 °C. Doubling the CO2 partial pressure resulted in twice the yield of corm because the net CO2 assimilation rate doubled and, due to the simple source-sink relationship, the increased production was partitioned to the corm. The response to CO2 of assimilation by konjak is discussed in relation to its original habitat in the tropics.