Ice plant

The sodium carboaate process is used ia a number of dry-ice plants ia the United States, although its operating efficiency is generaHy not as high as that of processes using other solutions. These plants obtain the carbon dioxide from flue gases as weH as lime-kiln gases. 

Eis-kasten, m. ice chest, ice box. -kraut, n, ice plant Meaembryanthemum cryatallinum). 

Figure 12.1 Can ice plant (Courtesy of Hall-Thermotank Products Ltd)...

A cDNA for an OMT (PFOMT) with wide substrate acceptance that includes flavonols and HCA derivatives has been identified from Mesembryanthemum crystallinum (ice plant). 

Positions 629-655 (ice plant ppcl) have been implicated as part of the binding site for phosphoeno/pyruvate (reviewed by Andreo et al.,... 

Much less is known about the biochemistry and molecular biology of other CAM/C4 enzymes and their genes than for PEPCase enzymes. The activity of a number of these enzymes is up-regulated during CAM-induction in the ice plant (Foster et al., 1982 Edwards et al., 1982 ... 

Two genes encoding different PEPCase enzymes have been identified and characterised in the ice plant (Cushman et al., 1989 Cushman Bohnert, 1989a,b). ppcl is the CAM-specific form, which is expressed predominantly in green tissue, leaves and shoots. A second isogene, ppc2, appears to be responsible for the housekeeping functions of PEPCase and is expressed constitutively at low levels in all tissues of the plant. 

Aside from PEPCase, a number of other CAM-related genes have been partially characterised (Table 1). These include cDNA clones for pyruvate, orthophosphate dikinase (PPDK), a specific NADP malate dehydrogenase (MDH), glyceraldehyde phosphate dehydrogenase (GaPDH) and NADP-dependent malic enzyme (MOD). Previous studies indicated that the enzymatic activities of these gene products increased upon salt stress in the ice plant (Holtum Winter, 1982). As in the case... 

Cushman, J.C., Meyer, G., Michalowski, C.B., Schmidt, J.M. Bohnert, H.J. (1989). Salt stress leads to differential expression of two isogenes of PEPCase during CAM induction in the common ice plant. Plant Cell 1, 715-25. 

Cushman, J.C., Vernon, D.M. Bohnert, H.J. (1992). ABA and the transcriptional control of CAM induction during salt stress in the common ice plant. In Control of Plant Gene Expression, ed. D.P. Verma. Boca Raton CRC Press (in press). 

De Armond, R., Bohnert, H.J. Thomas, J.C. (1991). Growth, amino acid composition, and PEPCase in ice plant suspension cultures. Plant Physiology 96S, 96. 

Michalowski, C.B., DeRocher, E.J., Bohnert, H.J. Salvucci, M. (1992). Phosphoribulokinase from ice plant Transcription, transcripts and protein expression during environmental stress. Photosynthesis Research 31 (in press). 

Vernon, D.M., Ostrem, J.A. Bohnert, H.J. (1991). The regulation of genes involved in salt tolerance and CAM induction in ice plant a complex web of molecular responses to environmental stimuli. Plant... 

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