Large Cellular Inclusions Accumulate in Arabidopsis Roots Exposed to Low-Sulfur Conditions.

Journal Article

Sulfur is vital for primary and secondary metabolism in plant roots. To understand the molecular and morphogenetic changes associated with loss of this key macronutrient, we grew Arabidopsis (Arabidopsis thaliana) seedlings in low-sulfur conditions. These conditions induced a cascade of cellular events that converged to produce a profound intracellular phenotype defined by large cytoplasmic inclusions. The inclusions, termed low-sulfur Pox, show cell type- and developmental zone-specific localization. Transcriptome analysis suggested that low sulfur causes dysfunction of the glutathione/ascorbate cycle, which reduces flavonoids. Genetic and biochemical evidence indicated that low-sulfur Pox are the result of peroxidase-catalyzed oxidation of quercetin in roots grown under sulfur-depleted conditions.

Full Text

Duke Authors

Cited Authors

  • Jackson, TL; Baker, GW; Wilks, FR; Popov, VA; Mathur, J; Benfey, PN

Published Date

  • August 2015

Published In

Volume / Issue

  • 168 / 4

Start / End Page

  • 1573 - 1589

PubMed ID

  • 26099270

Electronic International Standard Serial Number (EISSN)

  • 1532-2548

International Standard Serial Number (ISSN)

  • 0032-0889

Digital Object Identifier (DOI)

  • 10.1104/pp.15.00465

Language

  • eng