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Review
. 2009 Jan;149(1):71-81.
doi: 10.1104/pp.108.129049.

Genetic control of carbon partitioning in grasses: roles of sucrose transporters and tie-dyed loci in phloem loading

David M Braun  1 , Thomas L Slewinski
Affiliations
Review

Genetic control of carbon partitioning in grasses: roles of sucrose transporters and tie-dyed loci in phloem loading

David M Braun et al. Plant Physiol. 2009 Jan.

Erratum in

  • Plant Physiol. 2010 Aug;153(4):1940
No abstract available

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Figures

Figure 1.
Figure 1.
Maize leaf anatomy and path of Suc movement. A, Cross section of a maize leaf blade viewed under UV light to visualize cellular anatomy. Chlorophyll autofluoresces red and cell walls autofluoresce blue. One lateral vein and three minor veins are shown. B, Schematic diagram of cell types associated with the minor vein boxed in A. Maize veins display Kranz anatomy, with mesophyll cells surrounding bundle sheath cells, which surround the vein. Individual cell types are color coded for identification. Thick-walled sieve elements are shown in pink. C, Suc moves symplastically from mesophyll to bundle sheath to vascular parenchyma cells through plasmodesmata. Suc is exported to the apoplast by vascular parenchyma cells and imported into the companion cell and/or thin-walled sieve element by SUTs (yellow circles). BS, Bundle sheath cells; CC, companion cell; E, epidermal cells; HS, hypodermal sclerenchyma cells; M, mesophyll cells; MX, metaxylem vessels; Ph, phloem cells; PX, protoxylem lacuna; SE, thin-walled sieve element; VP, vascular parenchyma cell; X, xylem tracheary element.
Figure 2.
Figure 2.
Phylogenetic tree of all grass and select dicot SUTs showing relationships among SUTs. The phylogenetic tree was created with PHYLIP based on the alignment of deduced amino acid sequences using the ClustalW program. The tree was rooted with the SUT-like sequence from Aspergillus fumigatus (AfSUT; accession no. EAL92728) as an outgroup. The five different groups of SUTs are indicated with brackets, and the locations of the rice SUTs are highlighted. GenBank accession numbers for grass SUTs are presented in Table I, and those from dicots are as follows: AtSUC1 (At1g71880), AtSUC2 (At1g22710), AtSUC3 (At2g02860), AtSUT4 (At1g09960), AtSUC5 (At1g71890), AtSUC9 (At5g06170), LeSUT1 (X82275), LeSUT2 (AAG12987), LjSUT4 (CAD61275), NtSUT1 (X82276), PmSUC1 (Plantago major; CAI59556), PmSUC2 (X75764), PmSUC3 (CAD58887), PsSUF4 (DQ221697), StSUT1 (CAA48915), and StSUT4 (AAG25923). [See online article for color version of this figure.]
See this image and copyright information in PMC

References

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