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Crassulacean acid metabolism in the ZZ plant, Zamioculcas zamiifolia (Araceae)

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dc.contributor.author Holtum, Joseph A. M. en
dc.contributor.author Winter, Klaus en
dc.contributor.author Weeks, Mark A. en
dc.contributor.author Sexton, Timothy R. en
dc.date.accessioned 2009-01-02T16:56:07Z
dc.date.available 2009-01-02T16:56:07Z
dc.date.issued 2007
dc.identifier.citation Holtum, Joseph A. M., Winter, Klaus, Weeks, Mark A., and Sexton, Timothy R. 2007. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F6666">Crassulacean acid metabolism in the ZZ plant, Zamioculcas zamiifolia (Araceae)</a>." <em>American Journal of Botany</em>. 94 (10):1670&ndash;1676. <a href="https://doi.org/10.3732/ajb.94.10.1670">https://doi.org/10.3732/ajb.94.10.1670</a> en
dc.identifier.issn 0002-9122
dc.identifier.uri http://hdl.handle.net/10088/6666
dc.description.abstract Zamioculcas zamiifolia (Araceae), a terrestrial East African aroid, with two defining attributes of crassulacean acid metabolism (CAM) (net CO2 uptake in the dark and diel fluctuations of titratable acidity) is the only CAM plant described within the Araceae, a mainly tropical taxon that contains the second largest number of epiphytes of any vascular plant family. Within the Alismatales, the order to which the Araceae belong, Z. zamiifolia is the only documented nonaquatic CAM species. Zamioculcas zamiifolia has weak CAM that is upregulated in response to water stress. In well-watered plants, day-night fluctuations in titratable acidity were 2.5 lmol H_(g fresh mass)1, and net CO2 uptake in the dark contributed less than 1% to daily carbon gain. Following 10 d of water stress, net CO2 uptake in the light fell 94% and net CO2 uptake in the dark increased 7.5-fold, such that its contribution increased to 19% of daily carbon gain. Following rewatering, dark CO2 uptake returned to within 5% of prestressed levels. We postulate that CAM assists survival of Z. zamiifolia by reducing water loss and maintaining carbon gain during seasonal droughts characteristic of its natural habitat. en
dc.format.extent 295906 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.relation.ispartof American Journal of Botany en
dc.title Crassulacean acid metabolism in the ZZ plant, Zamioculcas zamiifolia (Araceae) en
dc.type Journal Article en
dc.identifier.srbnumber 55512
dc.identifier.doi 10.3732/ajb.94.10.1670
rft.jtitle American Journal of Botany
rft.volume 94
rft.issue 10
rft.spage 1670
rft.epage 1676
dc.description.SIUnit Gamboa en
dc.description.SIUnit Santa Cruz en
dc.description.SIUnit Central Panama en
dc.description.SIUnit CO2 exchange en
dc.description.SIUnit crassulacean acid metabolism en
dc.description.SIUnit Encyclopedia of Life en
dc.description.SIUnit Forces of Change en
dc.description.SIUnit STRI en
dc.citation.spage 1670
dc.citation.epage 1676

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