Abstract

A pot experiment was designed to explore the effects of different post-grafting generations of Solanum photeinocarpum Nakamura et Odashima intercropping on growth and cadmium (Cd) accumulation in soybeans (varieties: “Zaodou” and “Liaoxian”). Post generation of S. photeinocarpum (ungrafted, grafted on eggplant, potato, and tomato, respectively) were utilized to intercrop with two varieties of soybean in Cd-contaminated soil. Soybean monoculture was employed as a control. Consequently, intercropping with different post-grafting S. photeinocarpum generation, except for tomato rootstock grafts post-generation, could reduce soybean biomass and photosynthetic pigment content. Additionally, all S. photeinocarpum post-grafting generations had the capacity to reduce Cd content in soybean when intercropping, while tomato rootstock grafts post-generation exhibited an adequate ability to accumulate Cd in S. photeinocarpum compared to the ungrafted treatment. In particular, tomato rootstock grafts post-generation could effectively decrease Cd content in soybean organs by 14.09–62.13%, relative to soybean monoculture, but increased shoot Cd content and shoot Cd extraction of S. photeinocarpum by 10.33–13.49% and 10.38–12.03%, respectively, compared to the ungrafted treatment. Thus, tomato rootstock grafting may enhance the ability of post-grafting generation of S. photeinocarpum to remediate Cd-contaminated soil, and this grafting was able to reduce Cd accumulation in soybean.

 抽象的

设计盆栽试验，探讨中村和小田岛间作不同嫁接世代对大豆（“枣豆”和“辽县”）生长和镉（Cd）积累的影响。利用S. photoeinocarpum的后代（未嫁接，分别嫁接在茄子、马铃薯和番茄上）与镉污染土壤中的两个大豆品种间作。采用大豆单一栽培作为对照。因此，除番茄砧木嫁接后代外，间作不同嫁接后的光果树代均会降低大豆生物量和光合色素含量。此外，间作时，所有S. photoeinocarpum嫁接后世代均具有降低大豆中Cd 含量的能力，而与未嫁接处理相比，世代后的番茄砧木嫁接在S. photoeinocarpum中表现出足够的积累Cd 的能力。特别是，与单一栽培的大豆相比，番茄砧木嫁接后可有效降低大豆器官中的镉含量14.09-62.13%，但提高了S. photoeinocarpum地上部Cd含量和地上部Cd提取率10.33-13.49%和10.38-12.03分别与未嫁接处理相比。因此，番茄砧木嫁接可以增强嫁接后产生的S. photoeinocarpum修复Cd污染土壤的能力，并且该嫁接能够减少大豆中Cd的积累。