Article
Engineering, Environmental
Yue You, Lijuan Liu, Yu Wang, Jiaxin Li, Zhining Ying, Zhilin Hou, Huijun Liu, Shaoting Du
Summary: The study found that while graphene oxide (GO) reduced the accumulation of Cd in rice seedlings, it had adverse effects on plant growth under co-contamination conditions with Cd. Therefore, the impacts of GO on crop production, both positive and negative, should be a concern.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Plant Sciences
Miao Xu, Qi Zhang, Xiuyun Lin, Yuqing Shang, Xiyan Cui, Liquan Guo, Yuanrui Huang, Ming Wu, Kai Song
Summary: This research provides a detailed explanation of the hazardous and advantageous impacts of common metal oxide nanomaterials, such as iron oxide, copper oxide, and zinc oxide, on the life cycle of rice. The study analyzes various aspects including nanoparticle transport patterns in rice, plant reactions to stress, reduction of heavy metal stress, and improvement of rice quality by metal oxide nanoparticles. It emphasizes the need for further research on the molecular mechanisms of the effects of metal oxide nanoparticles on rice and the combined use with other biological media.
Article
Environmental Sciences
Xin Qian, Qixin Lu, Xiaosan He, Yujie Wang, Hanzhou Li, Qingtie Xiao, Xinyu Zheng, Ruiyu Lin
Summary: Cd pollution of paddy soils is a major concern for food security and environmental issues. Microbial bioremediation using Cd-resistant bacteria can effectively reduce Cd accumulation in crops. This study investigated the impact of Pseudomonas sp. TCd-1 on the rhizosphere bacterial communities of rice crops under Cd stress, revealing changes in community structure and network interactions. The findings provide insights for developing efficient bioremediation strategies and safe rice production in Cd-contaminated fields.
Article
Environmental Sciences
Antonio Leon-Vaz, Luis C. Romero, Cecilia Gotor, Rosa Leon, Javier Vigara
Summary: This study investigated the effect of cadmium on the microalga Chlorella sorokiniana through a proteomic approach, revealing adjustments in various metabolic pathways and an increase in pathways such as photorespiration and antioxidant enzymes. Additionally, it was found that Chlorella sorokiniana exhibits high tolerance to cadmium exposure, suggesting its potential use in bioremediation processes.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Agronomy
Xiaoxue Sun, Jiangnan Wang, Miao Zhang, Zunqi Liu, E. Yang, Yu Lan, Tianyi He, Jun Meng
Summary: Biochar is a potential amendment for remediating Cd-contaminated soil and reducing Cd uptake by rice. However, the effect of biochar on rice Cd uptake and soil Cd fractions under field conditions is still poorly understood.
Article
Multidisciplinary Sciences
Tahmina Islam, M. K. Reddy
Summary: Non-essential toxic heavy metals like cadmium (Cd2+) have adverse effects on the growth and development of plants and can potentially harm human health. This study focused on the role of a peroxidase gene family member, PgGPx, in rice under Cd2+ stress. The overexpression of PgGPx enhanced Cd2+ tolerance in transgenic rice plants and improved oxidative stress response by increasing the activity of antioxidant enzymes. These findings provide insights for developing strategies to engineer Cd2+ stress tolerance in economically important crop plants.
Article
Forestry
Shangguo Feng, Kailin Hou, Hongshan Zhang, Cheng Chen, Jiefang Huang, Qicong Wu, Zhenhao Zhang, Yadi Gao, Xiaomei Wu, Huizhong Wang, Chenjia Shen
Summary: The toxicity and stress caused by heavy metal contamination have a great impact on the growth and survival of trees, especially species belonging to the genus Taxus, which are highly sensitive to changes in the environment. This study analyzed the transcriptomic profiles of Taxus media trees exposed to cadmium (Cd2+) to investigate their response to heavy metal stress. Several metal tolerance protein (MTP) genes, including Cd2+ stress-inducible TMP genes (TmMTP1, TmMTP11), were identified in T. media. Through further analysis, it was found that TmMTP1/11 may regulate the accumulation of Cd2+ in cells. In addition, two Cd2+-induced R2R3-MYB TFs, TmMYB16 and TmMYB123, were identified, and they play a role in Cd2+ tolerance by regulating the expression of TmMTP1/11 genes. Overall, this study provides insights into the regulatory mechanisms of Taxus spp. in response to Cd stress and contributes to the breeding of environmentally adaptable Taxus species.
Letter
Engineering, Environmental
Sikhumbuzo Charles Kunene, Kuen-Song Lin, Ndumiso Vukile Mdlovu, You-Sheng Lin, Ncobile Bagezile Mdlovu
Summary: The study used XANES/EXAFS spectroscopy to determine the distribution and speciation of Cd in contaminated paddy soils and rice kernels, as well as investigated the morphology and crystallization of rice and soils. Results showed that Cd oxides formed Cd clusters with different bond distances and coordination numbers in soil and rice kernels. Additionally, the study examined the distribution of toxic metals/metalloid in contaminated paddy soils and rice crops, providing insights into the accumulation mechanism and distribution of heavy metals in contaminated rice farming soils and crops.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Maria Laura Flores-Caceres, Cristina Ortega-Villasante, Pablo Carril, Juan Sobrino-Plata, Luis E. Hernandez
Summary: Cadmium (Cd) and mercury (Hg) are soil pollutants that cause oxidative stress. The tolerance of plants is regulated by signalling processes, such as the accumulation of sHSPs and activation of antioxidant enzymes. This study focused on the early responses of alfalfa seedlings to Cd and Hg exposure and found that ethylene plays a role in the response to metal stress. The findings suggest that ethylene modulation could be a potential strategy to enhance plant tolerance to heavy metals.
Article
Environmental Sciences
Deyvid Novaes Marques, Marina Lima Nogueira, Salete Aparecida Gaziola, Katherine Derlene Batagin-Piotto, Natalia Chagas Freitas, Berenice Kussumoto Alcantara, Luciano Vilela Paiva, Chase Mason, Fernando Angelo Piotto, Ricardo Antunes Azevedo
Summary: Cadmium is a highly threatening contaminant in agricultural settings and can affect the metabolism and physiology of tomato plants even after short-term exposure. This study used cross-genotype grafting to distinguish between root- and shoot-mediated responses of tomato genotypes with contrasting cadmium tolerance. The results showed that the tolerant root-stock system played a dominant role in reducing cadmium uptake and accumulation, and there were genotype and organ-dependent variations in nutrient concentrations, oxidative stress parameters, antioxidant enzymes, and transporters gene expression. Reciprocal grafting was also found to be a fruitful approach for understanding the organ-specific modulation of cadmium tolerance and accumulation during the early stages of exposure.
ENVIRONMENTAL RESEARCH
(2023)
Article
Plant Sciences
Khurram Ziaf, Muhammad Awais Ghani, Iftikhar Ahmad, Raheel Anwar, Basharat Ali, Yasir Majeed, Amir Shakeel, Mudassar Iqbal, Abbu Zaid
Summary: Cadmium contamination negatively affects the growth and yield of pea plants, although varietal responses differ. Among the pea varieties tested in this study, Supreme, Green Cross, Green Gold, and Lina performed better under mild cadmium contamination conditions.
SOUTH AFRICAN JOURNAL OF BOTANY
(2023)
Article
Agronomy
Ping Liao, Shan Huang, Yongjun Zeng, Hua Shao, Jun Zhang, Kees Jan van Groenigen
Summary: Lime application significantly increases rice yield and soil pH, while reducing Cd concentrations in grains. The effects of lime on rice yield vary depending on soil pH and lime application rates, with higher lime application leading to greater reduction in Cd concentrations. Lime application at rates exceeding 1.0 and 6.0 t ha(-1) can effectively reduce Cd concentrations in grains to meet food safety standards.
Article
Plant Sciences
Xiaoxiao Liu, Di Gong, Qingbo Ke, Lina Yin, Shiwen Wang, Tianpeng Gao
Summary: A meta-analysis of 86 studies has shown that nitric oxide (NO) can significantly improve plant biomass, alleviate oxidative damage, and increase the content of Ca, Fe, and Mg in heavy metal-stressed plants. The optimal concentration of SNP (an NO donor) for hydroponic culture is in the range of 75-150 μM. These findings provide valuable insights for the future application of NO as a plant growth regulator for enhancing heavy metal stress tolerance in agriculture and breeding.
Article
Environmental Sciences
Milton Talukder, Shao-Shuai Bi, Hai-Tao Jin, Jing Ge, Cong Zhang, Mei-Wei Lv, Jin-Long Li
Summary: The study reveals that Cd-induced cerebral toxicity may involve the over-expression of metal transporters, suppression of MTF1 and its main target metal-responsive genes, as well as dysregulation of several selenoproteins.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Jagdish Gopal Paithankar, Sanjay Saini, Shiwangi Dwivedi, Anurag Sharma, Debapratim Kar Chowdhuri
Summary: The oxidative stress induced by heavy metals and its connection with different signaling pathways are complex, which may lead to a variety of health issues. Exposure to heavy metals/metalloids such as Arsenic, Chromium, Cadmium, and Lead can trigger oxidative stress and subsequently cellular and organismal responses, involving regulation of multiple signaling pathways.