Specialized plastids trigger tissue-specific signaling for systemic stress response in plants1[OPEN]

Jesús Beltrán, Yashitola Wamboldt, Robersy Sanchez, Evan W. LaBrant, Hardik Kundariya, Kamaldeep S. Virdi, Christian Elowsky, Sally A. Mackenzie

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Plastids comprise a complex set of organelles in plants that can undergo distinctive patterns of differentiation and redifferentiation during their lifespan. Plastids localized to the epidermis and vascular parenchyma are distinctive in size, structural features, and functions. These plastids are termed “sensory” plastids, and here we show their proteome to be distinct from chloroplasts, with specialized stress-associated features. The distinctive sensory plastid proteome in Arabidopsis (Arabidopsis thaliana) derives from spatiotemporal regulation of nuclear genes encoding plastid-targeted proteins. Perturbation caused by depletion of the sensory plastid-specific protein MutS HOMOLOG1 conditioned local, programmed changes in gene networks controlling chromatin, stress-related phytohormone, and circadian clock behavior and producing a global, systemic stress response in the plant. We posit that the sensory plastid participates in sensing environmental stress, integrating this sensory function with epigenetic and gene expression circuitry to condition heritable stress memory.

Original languageEnglish (US)
Pages (from-to)672-683
Number of pages12
JournalPlant physiology
Issue number2
StatePublished - Oct 2018

All Science Journal Classification (ASJC) codes

  • Physiology
  • Genetics
  • Plant Science


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