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Review
. 2021 May;230(3):931-937.
doi: 10.1111/nph.17192. Epub 2021 Feb 4.

Plastidial retrograde modulation of light and hormonal signaling: an odyssey

Jishan Jiang  1   2 , Katayoon Dehesh  2
Affiliations
Free article
Review

Plastidial retrograde modulation of light and hormonal signaling: an odyssey

Jishan Jiang et al. New Phytol. 2021 May.
Free article

Abstract

The transition from an engulfed autonomous unicellular photosynthetic bacterium to a semiautonomous endosymbiont plastid was accompanied by the transfer of genetic material from the endosymbiont to the nuclear genome of the host, followed by the establishment of plastid-to-nucleus (retrograde) signaling. The retrograde coordinated activities of the two subcellular genomes ensure chloroplast biogenesis and function as the photosynthetic hub and sensing and signaling center that tailors growth-regulating and adaptive processes. This review specifically focuses on the current knowledge of selected stress-induced retrograde signals, genomes uncoupled 1 (GUN1), methylerythritol cyclodiphosphate (MEcPP), apocarotenoid and β-cyclocitral, and 3'-phosphoadenosine 5'-phosphate (PAP), which evolved to establish the photoautotrophic lifestyle and are instrumental in the integration of light and hormonal signaling networks to ultimately fashion adaptive responses in an ever-changing environment.

Keywords: adaptive responses; chloroplast; light; photoautotroph; phytohormone; retrograde signals.

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References

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