Plant environmental sensing relies on specialized plastids. (22nd September 2022)

• Record Type: Journal Article
• Authors: Mackenzie, Sally A; Mullineaux, Philip M
• Editors: Teige, Markus
• Is Part Of: Journal of experimental botany. Volume 73:Number 21(2022)
• Page Start: 7155
• Page End: 7164
• Publication Date: 2022-09-22
• Subjects: Abiotic stress -- epidermis -- reactive oxygen species -- retrograde signaling -- stromules; Botany -- Periodicals; Botany, Experimental -- Periodicals; Plant physiology -- Periodicals; 580
• DOI: 10.1093/jxb/erac334
• Languages: English
• ISSNs: 0022-0957

Abstract

Abstract: In plants, plastids are thought to interconvert to various forms that are specialized for photosynthesis, starch and oil storage, and diverse pigment accumulation. Post-endosymbiotic evolution has led to adaptations and specializations within plastid populations that align organellar functions with different cellular properties in primary and secondary metabolism, plant growth, organ development, and environmental sensing. Here, we review the plastid biology literature in light of recent reports supporting a class of 'sensory plastids' that are specialized for stress sensing and signaling. Abundant literature indicates that epidermal and vascular parenchyma plastids display shared features of dynamic morphology, proteome composition, and plastid–nuclear interaction that facilitate environmental sensing and signaling. These findings have the potential to reshape our understanding of plastid functional diversification. Abstract : Plastids are more multifaceted in their spatial organization and environmental sensing and signaling than previously thought. This discovery opens the field to important new facets of how plants adjust to environmental change.