关键词: 葡萄, 臭氧, 光强, 光系统活性, 恢复

Abstract: To study the response of light system activity in grapevine leaves during ozone（O3）stress and recovery period，one-year old Vitis vinifera L.‘Cabernet Sauvignon’was used as material to be treated with ozone and low light（90 nL · L-1 + 10 μmol · m-2 · s-1），ozone and light（90 nL · L-1 + 800 μmol · m-2 · s-1），ozone and strong light（90 nL · L-1 + 1 600 μmol · m-2 · s-1）. Normal light（10 nL · L-1 O3 + 800 μmol · m-2 · s-1）was as the control. The gas exchange parameters of grape leaves at 1，5，9 and 13 h after treatment were determined，and the photosystem activities of PSⅠand PSⅡ in grape leaves were measured using Dual-PAM100 fluorometer. The results showed that，the net photosynthetic rate and stomatal conductance of grape leaves were reduced under ozone stress，and the Y(Ⅰ) and Y(Ⅱ) values of grape leaves were reduced at the same time. Under the same ozone concentration，the damage of grape leaves increased with the increase of light intensity. The net photosynthetic rate，Y(Ⅰ) and Y(Ⅱ) values of dark ozone and light-resistant ozone could be increased at 13 hours after recovery，but the damage of leaves under ozone and strong light became more serious at 13 hours after recovery，and could not be recovered.

Key words: grape, ozone, light intensity, light system activity, recovery