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. 1987 Jul;84(3):640–642. doi: 10.1104/pp.84.3.640

Relationship between Respiration and CAM-Cycling in Peperomia camptotricha1

Asmita Patel 1, Irwin P Ting 1
PMCID: PMC1056642  PMID: 16665494

Abstract

Mature leaves of well-watered Peperomia camptotricha show Crassulacean acid metabolism (CAM). Young leaves show CAM-cycling in which CO2 uptake occurs during the day concomitant with a marked diurnal fluctuation of organic acids as in CAM. Evidence is presented suggesting that respiration is the source of CO2 for nocturnal acid synthesis in leaves exhibiting CAM-cycling. Respiratory quotients for these leaves were consistently much less than unity despite the fact that the leaves metabolize starch. The conservation of CO2 by refixation into acids at night represents about 17% of the total photosynthetically fixed CO2 and about 50% of the total respiratory CO2.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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