Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stress
Soil cadmium (Cd) pollution has become increasingly severe, negatively affecting plant growth, soil safety, the ecological balance, and public health. Phytoremediation technology is an effective method for remediating soil Cd contamination because of its low cost, environmentally friendly nature, an...
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Elsevier
2025-09-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651325010164 |
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| author | Jing Jiang Chenyang Zhang Meng Na Shangqi Xu Xiaoping Li Shoubiao Zhou Jihai Zhou |
| author_facet | Jing Jiang Chenyang Zhang Meng Na Shangqi Xu Xiaoping Li Shoubiao Zhou Jihai Zhou |
| author_sort | Jing Jiang |
| collection | DOAJ |
| description | Soil cadmium (Cd) pollution has become increasingly severe, negatively affecting plant growth, soil safety, the ecological balance, and public health. Phytoremediation technology is an effective method for remediating soil Cd contamination because of its low cost, environmentally friendly nature, and minimal soil disturbance. However, phytoremediation efficiency is affected by factors such as the plant species, Cd concentration, and soil environment. In this study, a 180-day indoor potted experiment was conducted to explore the influences of various indole-3-acetic acid (IAA) levels on the growth, physiological and biochemical responses, Cd uptake, and soil enzyme activity of Cinnamomum (C.) camphora seedlings using 20 mg kg−1 Cd-contaminated soil with or without IAA treatments. The results showed that Cd stress significantly suppressed C. camphora seedling growth, whereas IAA application improved the basal diameter of seedlings by 22.22–133.33 %. This effect of IAA was observed primarily at low concentrations, while higher concentrations showed diminished effects. Compared to the Cd pollution treatment, adding 20 mg kg−1 IAA significantly enhanced the activities of antioxidant enzymes (SOD, POD, CAT), reduced the malondialdehyde (MDA) content, and decreased soil basal respiration (SBR). Moreover, IAA treatment promoted Cd uptake in the roots, stems, and leaves, and reduced the soil Cd content by 22.90–41.17 %. In conclusion, exogenous IAA addition effectively alleviates Cd stress by regulating the plant’s physiological and biochemical characteristics and soil enzyme activities. These findings suggest that the combined use of IAA and C. camphora represents a promising remediation method for soil heavy metal pollution. |
| format | Article |
| id | doaj-art-bee2d7c07b5e40249d80e4b525373369 |
| institution | DOAJ |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
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| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-bee2d7c07b5e40249d80e4b5253733692025-08-20T03:03:53ZengElsevierEcotoxicology and Environmental Safety0147-65132025-09-0130211867110.1016/j.ecoenv.2025.118671Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stressJing Jiang0Chenyang Zhang1Meng Na2Shangqi Xu3Xiaoping Li4Shoubiao Zhou5Jihai Zhou6Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu 241002, ChinaCollaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu 241002, China; Southwestern United Graduate School & Institute of International Rivers and Eco-security, Yunnan University, Kunming 650500, ChinaCollaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu 241002, ChinaCollaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu 241002, ChinaCollaborative Innovation Center of Southern Modern Forestry, Nanjing Forestry University, Nanjing 210037, ChinaCollaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu 241002, ChinaCollaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu 241002, China; Correspondence to: Anhui Normal University, Wuhu 241000, China.Soil cadmium (Cd) pollution has become increasingly severe, negatively affecting plant growth, soil safety, the ecological balance, and public health. Phytoremediation technology is an effective method for remediating soil Cd contamination because of its low cost, environmentally friendly nature, and minimal soil disturbance. However, phytoremediation efficiency is affected by factors such as the plant species, Cd concentration, and soil environment. In this study, a 180-day indoor potted experiment was conducted to explore the influences of various indole-3-acetic acid (IAA) levels on the growth, physiological and biochemical responses, Cd uptake, and soil enzyme activity of Cinnamomum (C.) camphora seedlings using 20 mg kg−1 Cd-contaminated soil with or without IAA treatments. The results showed that Cd stress significantly suppressed C. camphora seedling growth, whereas IAA application improved the basal diameter of seedlings by 22.22–133.33 %. This effect of IAA was observed primarily at low concentrations, while higher concentrations showed diminished effects. Compared to the Cd pollution treatment, adding 20 mg kg−1 IAA significantly enhanced the activities of antioxidant enzymes (SOD, POD, CAT), reduced the malondialdehyde (MDA) content, and decreased soil basal respiration (SBR). Moreover, IAA treatment promoted Cd uptake in the roots, stems, and leaves, and reduced the soil Cd content by 22.90–41.17 %. In conclusion, exogenous IAA addition effectively alleviates Cd stress by regulating the plant’s physiological and biochemical characteristics and soil enzyme activities. These findings suggest that the combined use of IAA and C. camphora represents a promising remediation method for soil heavy metal pollution.http://www.sciencedirect.com/science/article/pii/S0147651325010164Cd stressIndole-3-acetic acidCinnamomum camphora seedlingsPhysiological and biochemical characteristicsSoil enzyme activity |
| spellingShingle | Jing Jiang Chenyang Zhang Meng Na Shangqi Xu Xiaoping Li Shoubiao Zhou Jihai Zhou Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stress Ecotoxicology and Environmental Safety Cd stress Indole-3-acetic acid Cinnamomum camphora seedlings Physiological and biochemical characteristics Soil enzyme activity |
| title | Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stress |
| title_full | Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stress |
| title_fullStr | Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stress |
| title_full_unstemmed | Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stress |
| title_short | Regulatory roles of indole-3-acetic acid in the physiological and biochemical responses of Cinnamomum camphora seedlings under cadmium stress |
| title_sort | regulatory roles of indole 3 acetic acid in the physiological and biochemical responses of cinnamomum camphora seedlings under cadmium stress |
| topic | Cd stress Indole-3-acetic acid Cinnamomum camphora seedlings Physiological and biochemical characteristics Soil enzyme activity |
| url | http://www.sciencedirect.com/science/article/pii/S0147651325010164 |
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