Abstract This study investigated the effect of cadmium (Cd) chloride on the uptake of N, P, and K and evaluate the effect of Cd-resistant bacterium “N3” on reducing the adverse effect of Cd in grafted and nongrafted plants. The shoot and total dry weights of the nongrafted muskmelon plants decreased under 50 and 100 µM Cd treatments. The scion and shoot dry weights of the grafted plants increased significantly, whereas their root dry weight increased by nearly onefold compared with those of the CK-grafted plants regardless of Cd concentration. The N, P, and K contents in the nongrafted plants decreased under Cd treatments but increased under 50 µM Cd treatment when inoculated with “N3”. The N, P, and K contents in the grafted plants were lower than those treated with only Cd. The grafted and nongrafted plants exhibited low Cd accumulation in the scion or shoot part compared with the root tissues. “N3” inoculation reduced the Cd concentration in all tissues of the grafted and nongrafted plants. Our results demonstrated great variation in Cd accumulation in the grafted and nongrafted muskmelon plants, thereby promoting food safety under Cd contamination conditions.

中文翻译：

---

氯化镉（Cd）影响养分吸收，抗镉细菌减少甜瓜植物对镉的吸附

摘要 本研究调查了氯化镉 (Cd) 对 N、P 和 K 吸收的影响，并评估了抗镉细菌“N3”对减少嫁接和非嫁接植物中 Cd 不利影响的作用。在 50 和 100 µM Cd 处理下，未嫁接的甜瓜植物的枝条和总干重下降。无论 Cd 浓度如何，嫁接植物的接穗和地上部干重均显着增加，而与 CK 嫁接植物相比，它们的根干重增加了近一倍。当接种“N3”时，未嫁接植株的 N、P 和 K 含量在 Cd 处理下降低，但在 50 µM Cd 处理下增加。嫁接植株的N、P、K含量低于仅用Cd处理的植株。与根组织相比，嫁接和未嫁接的植物在接穗或地上部表现出较低的镉积累。“N3”接种降低了嫁接和未嫁接植物所有组织中的 Cd 浓度。我们的研究结果表明，嫁接和未嫁接的甜瓜植株中 Cd 的积累存在很大差异，从而促进了 Cd 污染条件下的食品安全。