College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
College of Horticulture & Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, China.
Int J Phytoremediation. 2024;26(12):1885-1892. doi: 10.1080/15226514.2024.2359527. Epub 2024 Jun 2.
The effects of rootstocks tomato ( L.), eggplant ( L.), and nightshade ( L.) grafting on the growth and selenium (Se) accumulation of Sendt. seedlings were studied to identify the most suitable rootstock for increasing Se uptake of fruit trees grown in Se-contaminated soil. The rootstocks of tomato, eggplant, and nightshade grafting increased the scion biomass of seedlings by 146.1%, 23.2%, and 94.5%, respectively, compared with the un-grafted seedlings. Moreover, tomato, eggplant, and nightshade rootstocks grafting increased the photosynthesis, superoxide dismutase activity, and peroxidase activity, while reducing the catalase activity and soluble protein content of seedlings. Although all three rootstocks grafting decreased Se contents in rootstock roots and stems, only nightshade rootstock grafting increased Se content in the scions of seedlings. Notably, root biomass, catalase activity, soluble protein content, rootstock root Se content, and rootstock stem Se content were closely related to the scion Se content. These findings suggest that only grafting onto nightshade rootstock significantly enhances Se uptake in , whereas tomato and eggplant rootstocks grafting have no effect on Se uptake.
本研究旨在寻找适宜的砧木，以提高在硒污染土壤中生长的果树对硒的吸收。通过番茄、茄子和龙葵的砧木嫁接，与未嫁接的幼苗相比，接穗的生物量分别增加了 146.1%、23.2%和 94.5%。此外，番茄、茄子和龙葵砧木嫁接均能提高幼苗的光合作用、超氧化物歧化酶活性和过氧化物酶活性，同时降低过氧化氢酶活性和可溶性蛋白含量。虽然三种砧木嫁接均降低了根和茎中的硒含量，但只有龙葵砧木嫁接增加了幼苗接穗中的硒含量。值得注意的是，根生物量、过氧化氢酶活性、可溶性蛋白含量、砧木根硒含量和砧木茎硒含量与接穗硒含量密切相关。这些结果表明，只有龙葵砧木嫁接能显著提高幼苗对硒的吸收，而番茄和茄子砧木嫁接对硒的吸收没有影响。
