Photoprotection of residual functional photosystem II units that survive illumination in the absence of repair, and their critical role in subsequent recovery
Photosystem II (PSII) complexes, which split water into oxygen, protons and electrons in photosynthesis, require light but are also inactivated by it. Recovery of PSII from photoinactivation requires de novo protein synthesis. PSII in capsicum leaf segments were photoinactivated in the absence of chloroplast-encoded protein synthesis. At large photon exposures and despite the absence of repair, a residual fraction of PSII remained functional, being ca 0.08-0.2 depending on the ease of gas...[Show more]
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