Final answer:
The article claims that photoinhibition modifies the F0 value of chlorophyll fluorescence. It occurs mainly in the PSII antenna, which contains chlorophyll molecules. The LD parameter controls how far an excitation can travel through a photosystem before being lost.
Step-by-step explanation:
The article claims that photoinhibition modifies the F0 value of chlorophyll fluorescence. It mentions that photoinhibition mainly affects antenna chlorophylls and leads to a reduction in the efficiency of photochemistry in chlorophyll fluorescence. Additionally, the article suggests that the contribution of fluorescence from pigments outside PSII can vary.
According to the information provided, photoinhibition occurs mainly in the PSII antenna. PSII antenna proteins, which contain chlorophyll molecules, surround the reaction center where the photochemistry takes place.
The article does not provide an exact number of chlorophylls directly positioned within PSII. However, it mentions that the light-harvesting complex of each photosystem contains a mixture of 300 to 400 chlorophyll a and b molecules, along with other pigments like carotenoids.
The parameter that controls how far an excitation can travel through a photosystem before being lost is known as the LD (travel distance parameter).
Overall, the impact of photoinhibition on chlorophyll fluorescence, its occurrence mainly in the PSII antenna, the estimated number of chlorophylls within PSII, the control of excitation travel distance, and the reduction in the efficiency of photochemistry in chlorophyll fluorescence are all discussed in the article.