Zhao Xinlin, Wang Yuanchang, Wang Chenyuan, Zhou Wei, Ouyang Da, Gao Shuaishuai, Tan Xiaofei, Huang Rong, Guo Yuan
Institute of Bast Fiber Crops and Center for Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, Hunan, China; Hunan Provincial Key Laboratory of the TCM Agricultural Biogenomics, Changsha 410205, Hunan, China.
Institute of Bast Fiber Crops and Center for Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, Hunan, China.
Bioresour Technol. 2025 Feb;418:131998. doi: 10.1016/j.biortech.2024.131998. Epub 2024 Dec 17.
Hemp has been widely used for cadmium (Cd) remediation. However, its remediation efficiency needs to be improved. Chitooligosaccharides can enhance plant resistance and growth; however, their effects on hemp for Cd-remediation remain unclear. Herein, a greenhouse pot experiment was conducted to investigate the effects of three doses (0, 22.5, and 45 μg m) of chitooligosaccharides (COS), chitin-oligosaccharides (NACOS), and hetero-chitooligosaccharides (HTCOS) on the growth and Cd-remediation efficiency of hemp. Results showed that chitooligosaccharides promoted the antioxidant system and aerial biomass (maximum 84 %) depending on doses and types. COS (22.5 μg m under 60 mg cadmium kg soil), NACOS, and HTCOS significantly elevated the Cd concentration in hemp. Consequently, NACOS and HTCOS (45 μg m) significantly increased the average Cd removal up to 61 % and 81 %, respectively, compared with the control. Therefore, spraying chitooligosaccharides can enhance growth and phytoremediation efficiency of hemp by elevating aerial biomass and cadmium concentration of hemp.
大麻已被广泛用于镉（Cd）修复。然而，其修复效率有待提高。壳寡糖可以增强植物抗性和促进生长；然而，它们对大麻镉修复的影响仍不清楚。在此，进行了一项温室盆栽试验，以研究三种剂量（0、22.5和45μg/m）的壳寡糖（COS）、几丁质寡糖（NACOS）和杂合壳寡糖（HTCOS）对大麻生长和镉修复效率的影响。结果表明，壳寡糖根据剂量和类型促进了抗氧化系统和地上生物量（最高达84%）。在土壤镉含量为60mg/kg时，22.5μg/m的COS、NACOS和HTCOS显著提高了大麻中的镉浓度。因此，与对照相比，NACOS和HTCOS（45μg/m）分别显著提高了平均镉去除率，最高可达61%和81%。因此，喷施壳寡糖可以通过提高大麻地上生物量和镉浓度来增强大麻的生长和植物修复效率。
