The study looked at how low light affects the leaves of cucumber seedlings. They tested two cucumber varieties in a controlled environment with low light conditions. The leaves in the middle and upper positions were most affected, showing decreased photosynthesis and chlorophyll activity. The main reason for the decrease in photosynthesis was not due to the stomata but other factors. The middle leaves of one variety showed stronger photosynthetic efficiency compared to the other variety. Overall, the study found that low light restricts photosynthesis and chlorophyll activity in cucumber seedling leaves, especially in the middle and upper positions.