Effects of Flooding Stress and Recovery on Root and Leaf Cell Membrane Stability at Cherry Tomato Seedlings

Abstract

【Objective】 To clarify the effects of flooding days and recovery days on the growth, physiological and biochemical indices of cherry tomato, and to provide a reference for the optimal cultivation of cherry tomato in tropical areas. 【Method】 Five flooding days were set up: 2 days (W2), 4 days (W4), 6 days (W6), 10 days (W10) and 14 days (W14), and five recovery days: 2, 4, 10 and 14 days, and the response law of different cherry tomato seedling stage recovery under flooding stress was explored. 【Result】 Flooding days and recovery days significantly affected the root growth, antioxidant enzyme activity and membrane lipid peroxidation of cherry tomato at seedling stage. The superoxide dismutase (SOD) and peroxidase (POD) activities of QX were higher than those of CK, and the content of malondialdehyde (MDA) was lower than that of CK; The catalase (CAT) and POD activity, MDA content and superoxide anion free radical (O2·-) production rate of HF varieties can still return to the normal level compared with CK after 6 days of flooding. When the flooding time is the same, the CAT and POD activity of HF varieties are higher than CK after 2 to 4 days of recovery, while the CAT activity of QX varieties are higher than CK after 6 days of recovery, With the extension of flooding days, the recovery ability of QX varieties decreased gradually. 【Conclusion】 The corresponding laws of flooding stress and recovery of different varieties are different, and the recovery effect of cherry tomato is better when the flooding is relieved for 2 to 6 days, and the recovery ability gradually stabilizes after 2 to 6 days of recovery.

Keywords

• flooding
• restoration
• cherry tomatoes
• physiological and biochemical characteristics