Transcriptional profiles of organellar metabolite transporters during induction of crassulacean acid metabolism in Mesembryanthemum crystallinum

Functional Plant Biology : FPB
Shin Kore-EdaJohn C Cushman

Abstract

Metabolite transport across multiple organellar compartments is essential for the operation of crassulacean acid metabolism (CAM). To investigate potential circadian regulation of inter-organellar metabolite transport processes, we have identified eight full-length cDNAs encoding an organellar triose phosphate / Pi translocator (McTPT1), a phosphoenolpyruvate / Pi translocator (McPPT1), two glucose-6-phosphate / Pi translocators (McGPT1, 2), two plastidic Pi translocator-like proteins (McPTL1, 2), two adenylate transporters (McANT1, 2), a dicarboxylate transporter (McDCT2), and a partial cDNA encoding a second dicarboxylate transporter (McDCT1) in the model CAM plant, Mesembryanthemum crystallinum L. We next investigated day / night changes in steady-state transcript abundance of each of these transporters in plants performing either C3 photosynthesis or CAM induced by salinity or water-deficit stress. We observed that the expression of both isogenes of the glucose-6-phosphate / Pi translocator (McGPT1, 2) was enhanced by CAM induction, with McGPT2 transcripts exhibiting much more pronounced diurnal changes in transcript abundance than McGPT1. Transcripts for McTPT1, McPPT1, and McDCT1 also exhibited more pronounced diurnal cha...Continue Reading

References

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Citations

Apr 28, 2009·Journal of Experimental Botany·Anne M BorlandJ Andrew C Smith
Jul 1, 2005·Functional Plant Biology : FPB·Joseph A M HoltumH Ekkehard Neuhaus
Jul 1, 2005·Functional Plant Biology : FPB·John C Cushman
Mar 9, 2013·Bioscience, Biotechnology, and Biochemistry·Muhammad Abul Kalam AzadShin Kore-eda
Apr 22, 2016·Current Opinion in Plant Biology·Anne M BorlandJohn C Cushman
Nov 24, 2007·BMC Genomics·Laurent G DelucGrant R Cramer

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Datasets Mentioned

BETA
AB190772
AB190773
AB190774
AAA84892
AAF86908
AAF86907
AAF86906
AAC08525
AB190777
AB190778

Methods Mentioned

BETA
PCR
electrophoresis

Software Mentioned

Phylip
ClustalX
BLAST
TMHMM
CAM
NIH Image

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