The study looked at how sweet cherry seedlings grown in low light in a greenhouse responded when moved to sunlight. They measured chlorophyll levels and photosynthesis parameters to see how the plants adapted. The seedlings showed higher chlorophyll content and increased carotenoids when exposed to sunlight. Their photosynthetic capacity improved but didn't reach the level of plants grown in full sunlight. The transition caused changes in photosynthetic structures and activated protective mechanisms, but also damaged the photosynthetic reaction center. Overall, the seedlings struggled to fully adjust to the new light conditions.