%0 Journal Article %A LIU Congcong %A LAN Chaojie %A LI Huan %A HUANG Jiaquan %A LI Changjiang %T Responses of Waterlogging Stress and Evaluation of Waterlogging Tolerance in Cherry Tomato at Seedling Stage %D 2020 %R 10.11869/j.issn.100-8551.2020.03.0650 %J Journal of Nuclear Agricultural Sciences %P 650-660 %V 34 %N 3 %X The aim of this study is to investigate the response of cherry tomato and its waterlogging tolerance to the number of days under flooding stress at seedling stage. Qianxi, Lixinjiaxi, Hongfei 6, Hongzuanshi and Taiwanzanmei, five common cherry tomato varieties from tropical regions, were selected in this study. Physiological and biochemical indexes such as superoxide anion radical (O2·-) content, malondialdehyde (MDA) content, antioxidant enzyme system, osmotic regulatory substances, root activity and morphological indicators include root activity, plant height, dry weight of shoots, dry weight of roots and root-shoot ratio in functional leaves of cherry tomato seedlings were determined after different flooded days of 0, 2, 4, 8 and 16 d. The results showed that the content of O2·- and MDA in leaves of cherry tomato showed a tendency of first rising and then falling in the early stage, while in the late flooding period, the varieties of Qianxi and Lixinjiaxi showed rapid rise and significantly higher than the control after flooding16 days. The superoxide dismutase was decreased than CK after flooding, and only Hogfei 6 was higher than CK after flooded 16 days. And peroxidase in leaves showed a trend of gradual increase and then decrease and only Hongzuanshi was still higher than CK in the late flooding period, while the catalase activity of Hongfei 6 was significantly higher than the control on the second day of flooding, while others was all lower than the control or on difference form CK. However, during the waterlogging stress it was significant for the content of soluble sugar and proline to increase in the leaves of cherry tomato. As the flooding days went by, the root activity increased first and then decreased, and there was a significant decrease in Qianxi and Lixinjiaxi varieties after flooded 16 days. Under the stress of flooding, plant height, dry weight of aboveground and dry weight of root were lower than that of control. Except for the Qianxi, the root-shoot ratio was higher than that of the control, and hongfei 6 reached a significant level. Using principal component analysis (PCA) to comprehensively evaluate the cultivar’s waterlogging resistance: Hongfei 6 > Hongzuanshi > Taiwanzanmei > Lixinjiaxi > Qianxi. The results of this study provide a theoretical reference for the selection of cherry tomato cultivars and the mechanism of resistance to waterlogging cultivation in the tropics. %U https://www.hnxb.org.cn/EN/10.11869/j.issn.100-8551.2020.03.0650