NDLI: The Tie-dyed pathway promotes symplastic trafficking in the phloem

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The Tie-dyed pathway promotes symplastic trafficking in the phloem

Content Provider	Scilit
Author	Baker, R. Frank Slewinski, Thomas L. Braun, David M.
Copyright Year	2013
Description	The tie-dyed1 (tdy1) and tdy2 mutants of maize exhibit leaf regions with starch hyperaccumulation and display unusual genetic interactions, suggesting they function in the same physiological process. Tdy2 encodes a putative callose synthase and is expressed in developing vascular tissues of immature leaves. Radiolabelling experiments and transmission electron microscopy (TEM) revealed symplastic trafficking within the phloem was perturbed at the companion cell/sieve element interface. Here, we show that as reported for tdy2 mutants, tdy1 yellow leaf regions display an excessive oil-droplet phenotype in the companion cells. Based on the proposed function of Tdy2 as a callose synthase, our previous work characterizing Tdy1 as a novel, transmembrane-localized protein, and the present findings, we speculate how TDY1 and TDY2 might interact to promote symplastic transport of both solutes and developmentally instructive macromolecules during vascular development at the companion cell/sieve element interface.
Related Links	http://europepmc.org/articles/pmc3909061?pdf=render https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3909061/pdf
e-ISSN	15592324
DOI	10.4161/psb.24540
Journal	Plant signaling & behavior
Issue Number	6
Volume Number	8
Language	English
Publisher	Informa UK Limited
Publisher Date	2013-06-01
Access Restriction	Open
Subject Keyword	Developmental Biology Plant Sciences Callose Synthase Companion Cell Oil Droplet Phloem Plasmodesmata Sieve Element Symplastic Trafficking Tie-dyed
Content Type	Text
Resource Type	Article

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