The chloroplast can act as an environmental sensor, communicating with the cell during
biogenesis and operation to change the expression of thousands of proteins. This process …

Significance: In photosynthetic organisms, excited chlorophylls (Chl) can stimulate the
formation of singlet oxygen (1O2), a highly toxic molecule that acts in addition to its …

Enhanced levels of singlet oxygen (1O2) in chloroplasts trigger programmed cell death. The
impact of 1O2 production in chloroplasts was monitored first in the conditional fluorescent …

Plant immune response is tightly controlled by an interplay of various phytohormones and
plant growth regulators. Among them, the role of salicylic acid, jasmonic acid, and ethylene …

Chloroplasts in angiosperms contain at least seven nucleus-encoded members of the DEAD
box RNA helicase family. Phylogenetic analysis shows that five of these plastid members …

The exchange of signals between cellular compartments coordinates development and
differentiation, modulates metabolic pathways, and triggers responses to environmental …

Highlights•The impact of photosynthetic redox regulation mechanisms on signalling is
discussed.•Likely candidates for signalling components in the chloroplast are reviewed.• …

Abstract Singlet oxygen (1 O 2)-mediated signaling has been established in the conditional
flu orescent (flu) mutant of Arabidopsis. In the dark, the flu mutant accumulates free …

The plastid genome is highly conserved among plant species, suggesting that alterations of
its structure would have dramatic impacts on plant fitness. Nevertheless, little is known about …

Plastid-nucleus genome coordination is crucial for plastid activity, but the mechanisms
remain unclear. By treating Arabidopsis plants with the organellar genome-damaging agent …