Specialized Plastids Trigger Tissue-Specific Signaling for Systemic Stress Response in Plants.

Autor:	Beltrán J; Departments of Biology and Plant Science, The Pennsylvania State University, University Park, Pennsylvania 16802.; Department of Agronomy and Horticulture, University of Nebraska, Lincoln, Nebraska 68588., Wamboldt Y; Department of Agronomy and Horticulture, University of Nebraska, Lincoln, Nebraska 68588., Sanchez R; Departments of Biology and Plant Science, The Pennsylvania State University, University Park, Pennsylvania 16802., LaBrant EW; Department of Agronomy and Horticulture, University of Nebraska, Lincoln, Nebraska 68588., Kundariya H; Departments of Biology and Plant Science, The Pennsylvania State University, University Park, Pennsylvania 16802., Virdi KS; Department of Agronomy and Horticulture, University of Nebraska, Lincoln, Nebraska 68588., Elowsky C; Department of Agronomy and Horticulture, University of Nebraska, Lincoln, Nebraska 68588., Mackenzie SA; Departments of Biology and Plant Science, The Pennsylvania State University, University Park, Pennsylvania 16802 sam795@psu.edu.
Jazyk:	angličtina
Zdroj:	Plant physiology [Plant Physiol] 2018 Oct; Vol. 178 (2), pp. 672-683. Date of Electronic Publication: 2018 Aug 22.
DOI:	10.1104/pp.18.00804
Abstrakt:	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. (© 2018 American Society of Plant Biologists. All rights reserved.)
Databáze:	MEDLINE
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