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The paralogous R3 MYB proteins CAPRICE, TRIPTYCHON and ENHANCER OF TRY AND CPC1 play pleiotropic and partly non-redundant roles in the phosphate starvation response of Arabidopsis roots.

Chen CY, Schmidt W - J. Exp. Bot. (2015)

Bottom Line: The data show that in an intricate interplay between the three MYBs regulate several developmental, physiological and metabolic processes that are putatively located in different tissues.Control of gene activity is partly mediated through the regulation of potential antisense transcripts.The current dataset extends the known functions of R3 MYB proteins, provides a suite of novel candidates with critical function in root hair development under both control and Pi-deficient conditions, and challenges the definition of genetic redundancy by demonstrating that environmental perturbations may confer specific functions to orthologous proteins that could have similar roles under control conditions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan, and National Chung-Hsing University, Taichung, Taiwan Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, Taiwan.

No MeSH data available.


Related in: MedlinePlus

Scheme depicting the regulation and putative roles of genes involved in membrane lipid remodelling by CPC, ETC1 and TRY in Pi-deficient Arabidopsis roots. PC, phosphatidylcholine; LPC, lysophosphatidylcholine; G3P, glycerol-3-phosphate; PA, phosphatidic acid; P-Cho, phosphocholine; Cho, cholin; DAG, diacylglycerol. (This figure is available in colour at JXB online.)
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Figure 6: Scheme depicting the regulation and putative roles of genes involved in membrane lipid remodelling by CPC, ETC1 and TRY in Pi-deficient Arabidopsis roots. PC, phosphatidylcholine; LPC, lysophosphatidylcholine; G3P, glycerol-3-phosphate; PA, phosphatidic acid; P-Cho, phosphocholine; Cho, cholin; DAG, diacylglycerol. (This figure is available in colour at JXB online.)

Mentions: A large percentage of Pi is recycled during Pi starvation by replacing PLs in membranes with the galactolipid digalactosyldiacylglycerol (DGDG) and a sulfolipid, sulfoquinovosyldiacylglycerol (SQDG) (‘membrane lipid remodelling’; Nakamura et al., 2009; Nakamura et al. 2014). The current analysis suggests that membrane lipid remodelling is partly or chiefly controlled by the three R3 MYBs (see above). R3 MYB-controlled steps in a putative metabolic pathway that ultimately leads to the liberation of Pi from phospholipids (PLs) and substitution of PLs by DGDG and SQDG are depicted in Fig. 6.


The paralogous R3 MYB proteins CAPRICE, TRIPTYCHON and ENHANCER OF TRY AND CPC1 play pleiotropic and partly non-redundant roles in the phosphate starvation response of Arabidopsis roots.

Chen CY, Schmidt W - J. Exp. Bot. (2015)

Scheme depicting the regulation and putative roles of genes involved in membrane lipid remodelling by CPC, ETC1 and TRY in Pi-deficient Arabidopsis roots. PC, phosphatidylcholine; LPC, lysophosphatidylcholine; G3P, glycerol-3-phosphate; PA, phosphatidic acid; P-Cho, phosphocholine; Cho, cholin; DAG, diacylglycerol. (This figure is available in colour at JXB online.)
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4507782&req=5

Figure 6: Scheme depicting the regulation and putative roles of genes involved in membrane lipid remodelling by CPC, ETC1 and TRY in Pi-deficient Arabidopsis roots. PC, phosphatidylcholine; LPC, lysophosphatidylcholine; G3P, glycerol-3-phosphate; PA, phosphatidic acid; P-Cho, phosphocholine; Cho, cholin; DAG, diacylglycerol. (This figure is available in colour at JXB online.)
Mentions: A large percentage of Pi is recycled during Pi starvation by replacing PLs in membranes with the galactolipid digalactosyldiacylglycerol (DGDG) and a sulfolipid, sulfoquinovosyldiacylglycerol (SQDG) (‘membrane lipid remodelling’; Nakamura et al., 2009; Nakamura et al. 2014). The current analysis suggests that membrane lipid remodelling is partly or chiefly controlled by the three R3 MYBs (see above). R3 MYB-controlled steps in a putative metabolic pathway that ultimately leads to the liberation of Pi from phospholipids (PLs) and substitution of PLs by DGDG and SQDG are depicted in Fig. 6.

Bottom Line: The data show that in an intricate interplay between the three MYBs regulate several developmental, physiological and metabolic processes that are putatively located in different tissues.Control of gene activity is partly mediated through the regulation of potential antisense transcripts.The current dataset extends the known functions of R3 MYB proteins, provides a suite of novel candidates with critical function in root hair development under both control and Pi-deficient conditions, and challenges the definition of genetic redundancy by demonstrating that environmental perturbations may confer specific functions to orthologous proteins that could have similar roles under control conditions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei, Taiwan, and National Chung-Hsing University, Taichung, Taiwan Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, Taiwan.

No MeSH data available.


Related in: MedlinePlus