Fig. 8.

Schematic illustration of the function of TRX-FLN in the regulation of redox balance and transcription of PEP-dependent genes. TRX-FLN regulates the expression of PEP-encoded genes, further impacting on chloroplast development; it may also act upon redox balance through affecting ROS activities under heat stress. Furthermore, elevated ROS can give rise to nuclear genetic reprogramming, enabling the plant to adapt to particular heat stress. The yellow box represents the PEP complex; the red circled complex represents the TRX-FLN regulatory module; the black dotted box indicates the redox balance in chloroplasts; and the rpo core represents subunits of the PEP complex.