淹水胁迫及恢复对樱桃番茄苗期根系和叶片细胞膜稳定性的影响  

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

作　　者：刘聪聪 兰超杰 李欢 李长江 邱尧 玉香伦 LIU Congcong;LAN Chaojie;LI Huan;LI Changjiang;QIU Yao;YU Xianglun(Guizhou Institute of Biotechnology,Guiyang 550006,China;College of Tropical Crops,Hainan University,Haikou 570228,China;Guizhou Institute of Crop Varieties Resources,Guiyang 550006,China)

机构地区：[1]贵州省生物技术研究所,贵阳550000 [2]海南大学热带作物学院,海口570228 [3]贵州省农作物品种资源研究所,贵阳550000

出　　处：《灌溉排水学报》2022年第9期61-70,共10页Journal of Irrigation and Drainage

基　　金：海南省自然科学基金项目(318QN201);国家自然科学基金项目(31860130)。

摘　　要：【目的】明确淹水天数和恢复天数对樱桃番茄苗期生长发育和生理生化指标的影响,为热带地区樱桃番茄优化栽培提供参考。【方法】以“红妃6号”(HF)和“千禧”(QX)为试验材料,设置6个不同淹水天数:淹水0 d(CK)、淹水2 d(W2)、4 d(W4)、6 d(W6)、10 d(W10)和14 d(W14);5个不同恢复天数:恢复2、4、6、10d和14d,探究淹水胁迫下不同樱桃番茄苗期恢复的响应规律。【结果】淹水天数和恢复天数均可显著影响樱桃番茄苗期根系生长、抗氧化酶活性及膜脂过氧化程度。在淹水2 d时解除胁迫并恢复14 d,千禧品种的超氧化物歧化酶(SOD)和过氧化物酶(POD)活性均较CK高,丙二醛(MDA)量较CK降低;而红妃6号品种在淹水6 d时解除胁迫并恢复14 d,其过氧化氢酶(CAT)和POD活性、MDA量和超氧阴离子自由基(O_(2)^(·-))产生速率较CK仍能恢复至正常水平,淹水时间相同时,红妃6号品种在恢复2~4d时的根系活力、CAT和POD活性较CK升高,而千禧品种多在恢复6 d时CAT活性较CK提高,随着淹水天数的延长,千禧品种恢复能力逐渐减弱。【结论】不同品种对淹水胁迫及恢复的相应规律不同,淹水2~6 d时解除胁迫,红妃6号恢复效果较好,且在2~6 d后恢复能力逐渐趋于稳定。【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(O_(2)^(·-))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 4days 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.

关 键 词：淹水 恢复 樱桃番茄 生理生化特性 

分 类 号：S431.191[农业科学—农业昆虫与害虫防治]