【摘要】 为研究镉胁迫下嫁接西瓜幼苗生理状况，分析不同砧木嫁接对西瓜抵抗重金属的情况，以野生西瓜类型砧木（YZ1）和中国南瓜类型砧木（SZ111）嫁接拿比特（NBT）,使用0.6 mg·L^-1的CdCl₂溶液作水培处理。结果表明，与对照组相比，各个嫁接组合的处理组的地上部和地下部鲜重均极显著降低；从农艺性状来看，YZ1/NBT与NBT的处理组比对照组降低更显著，SZ111/NBT的处理组与对照组差异较小；从MDA含量来看，SZ111/NBT的处理组与对照组的差异比其余2个嫁接组合小；从根部GA₃含量和IAA含量来看，SZ111/NBT的处理组与对照组的差异均比YZ1/NBT的处理组与对照组的差异大，说明SZ111作为砧木时，促使GA₃含量极显著升高、IAA含量极显著降低来降低细胞壁的可塑性，减少Cd向植物体内运输，因此，SZ111/NBT受Cd影响相对较小，可以作为Cd污染地区西瓜砧木种植；YZ1作为砧木时受Cd影响较大，不建议在Cd污染地区种植使用。更多还原

【Abstract】 To study the physiological status of grafted watermelon seedlings under cadmium stress and analyze the resistance of watermelon to heavy metals by grafting different rootstocks, wild watermelon rootstock YZ1 and Chinese pumpkin rootstock SZ111 were grafted with Nabit（NBT）. A 0.6 mg·L^-1 CdCl₂ solution was used for hydroponic treatment. The results showed that compared with the control group, the fresh weight of both aboveground and underground parts in the treatment groups of each grafting combination was extremely significantly reduced. In terms of agronomic traits, the treatment groups of YZ1/NBT and NBT showed a more significant decrease compared with the control group, while the treatment group of SZ111/NBT had a smaller difference compared with the control group. In terms of MDA content, the difference between the treatment group and the control group of SZ111/NBT was smaller than the other two grafting combinations. In terms of GA₃ and IAA content in the roots, the difference between the treatment group and the control group of SZ111/NBT was greater than that between the treatment group and the control group of YZ1/NBT, indicating that when SZ111 was used as a rootstock, it promoted an extremely significantly increase in GA₃ content and an decrease in IAA content to reduce cell wall plasticity and reduce Cd transport into the plant. Therefore, SZ111/NBT is relatively less affected by Cd and can be used as a rootstock for watermelon cultivation in Cd contaminated areas. YZ1 is greatly affected by Cd when used as a rootstock. It is not recommended to plant and use it in Cd polluted areas.更多还原