Article
Environmental Sciences
Dajiang Yan, Shan Xue, Zhibin Zhang, Guodong Xu, Yanhao Zhang, Jianan Gao, Wen Zhang
Summary: This study found that diluted air nanobubbles in water can enhance the uptake of cadmium by the aquatic plant Alternanthera philoxeroides, as well as promote plant growth and increase photosynthetic pigments. The introduction of air nanobubbles also boosts the activity of antioxidant enzymes and crucial antioxidants, providing a potential explanation for the improvement in cadmium detoxification and overall plant growth rates. Furthermore, the presence of nanobubbles alters the composition of dissolved organic matter in the rhizosphere, affecting complexation processes and the uptake of cadmium. This study demonstrates the potential of using air nanobubbles in water systems to enhance phytoremediation processes.
ENVIRONMENTAL POLLUTION
(2023)
Article
Plant Sciences
Agnieszka Domka, Roman Jedrzejczyk, Rafal Wazny, Maciej Gustab, Michal Kowalski, Michal Nosek, Jakub Bizan, Markus Puschenreiter, Marek Vaculik, Jan Kovac, Piotr Rozpadek
Summary: Plant microbiota plays a crucial role in adjusting plant metabolism to mitigate toxic metal pollution. The endophytic Sporobolomyces ruberrimus protects plants against excess metals by inhibiting Fe and Ni uptake through interference with plant ethylene homeostasis.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Engineering, Environmental
K. B. Arun, Aravind Madhavan, Raveendran Sindhu, Shibitha Emmanual, Parameswaran Binod, Arivalagan Pugazhendhi, Ranjna Sirohi, R. Reshmy, Mukesh Kumar Awasthi, Edgard Gnansounou, Ashok Pandey
Summary: The impact of heavy metals on the gut microbiome is continuous, with the microbiome attempting to detoxify heavy metals to maintain balance. Heavy metal exposure can lead to dysbiosis of the gut microbiome, resulting in the development of diseases.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Environmental Sciences
Imran Khan, Samrah Afzal Awan, Muhammad Rizwan, Shafaqat Ali, Muhammad Jawad Hassan, Marian Brestic, Xinquan Zhang, Linkai Huang
Summary: This review focuses on the role of silicon in mitigating heavy metal toxicity in plants, discussing its various interactions with biological and non-biological factors. It highlights six main aspects of silicon's involvement in plants and points out the need for future research to focus on methods of alleviating heavy metal toxicity in plants.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Plant Sciences
Kanika Khanna, Puja Ohri, Renu Bhardwaj, Parvaiz Ahmad
Summary: The presence of cadmium in soil can negatively impact plant and microbial activities, affecting plant growth and leading to agricultural constraints. However, microbial inoculants can help plants tolerate cadmium stress and enhance productivity. Microorganisms in the rhizosphere interact with plants through signaling mechanisms, aiding in plant growth and improving nutrient uptake.
JOURNAL OF PLANT GROWTH REGULATION
(2022)
Article
Environmental Sciences
Yuqi Wang, Yan Kang, Wancong Yu, Sangbom M. Lyi, Hyong Woo Choi, Enzong Xiao, Li Li, Daniel F. Klessig, Jiping Liu
Summary: This study found that the tonoplast intrinsic protein AtTIP2;2 in Arabidopsis is involved in zinc immobilization and resistance. It helps retain excess zinc in the root, limits its translocation, and facilitates accumulation in leaf trichomes. The findings provide new insights into the role of aquaporins in heavy metal resistance and detoxification in plants.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Review
Microbiology
Samiksha Joshi, Saurabh Gangola, Geeta Bhandari, Narendra Singh Bhandari, Deepa Nainwal, Anju Rani, Sumira Malik, Petr Slama
Summary: The increasing rate of industrialization, anthropogenic, and geological activities have led to higher concentration of heavy metals in the environment, posing potential threats to humans, animals, and aquatic organisms. Bioremediation using rhizospheric microorganisms is a reliable solution for reducing the toxicity of these contaminants in an environmentally safe manner. By exploiting microbial metabolism and plant growth promoting bacteria, the concentration of heavy metals can be minimized for effective environmental clean-up.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Engineering, Environmental
Yoseop Lee, Deok-Seo Yoon, Young Hwan Lee, Jin Il Kwak, Youn-Joo An, Jae-Seong Lee, Jun Chul Park
Summary: The study revealed potential synergistic effects between microplastics and zinc, resulting in gender-specific impacts on Daphnia magna, with males showing greater sensitivity than females. Additionally, microplastics were found to act as vectors for metals in the aquatic environment, leading to increased toxicity.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Engineering, Environmental
Ming Ao, Xiaoting Chen, Tenghaobo Deng, Shengsheng Sun, Yetao Tang, Jean Louis Morel, Rongliang Qiu, Shizhong Wang
Summary: This review explores the mechanisms of chromium uptake, transport, and accumulation in soil-plant systems to reduce its toxicity and ecological risk, focusing on recent advancements from 2017 to 2021. It also highlights the reduction and immobilization mechanisms using organic and inorganic reductants for Cr(VI) remediation in contaminated soils, as well as research challenges and potential prospects in the biogeochemical behavior of chromium in soil-plant systems and its environmental impacts.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Engineering, Environmental
Lili Qu, Jiayang Xu, Zhihua Dai, Ali Mohamed Elyamine, Wuxing Huang, Dan Han, Bingjun Dang, Zicheng Xu, Wei Jia
Summary: Selenium (Se) is essential for humans and beneficial for plants, but high doses can be hazardous. This review summarizes sources and concentrations of Se in soils, factors influencing its bioavailability, mechanisms of uptake and translocation in plants, detoxification strategies, and remediation strategies for Se pollution. High Se concentrations are mainly due to wastewater discharge and industrial waste dumping. Selenate (Se [VI]) and selenite (Se [IV]) are the primary forms of Se absorbed by plants. Soil conditions such as pH, redox potential, organic matter, and microorganisms affect Se bioavailability. Excessive Se in plants interferes with element uptake, depresses pigment biosynthesis, generates oxidative damage, and causes genotoxicity. To mitigate Se toxicity, plants employ strategies such as activating antioxidant defense systems and sequestering excess Se in vacuoles. Remediation strategies include phytoremediation, organic matter amendment, microbial remediation, adsorption techniques, and chemical reduction technologies. This review expands knowledge on Se toxicity/detoxification in soil-plant systems and provides valuable insights into remediation strategies for Se pollution.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Review
Environmental Sciences
Muhammad Riaz, Muhammad Kamran, Muhammad Rizwan, Shafaqat Ali, Aasma Parveen, Zaffar Malik, Xiurong Wang
Summary: Cadmium is a major contaminant in agricultural soils worldwide, with varying abilities among different plant species and genotypes to uptake, transport, detoxify, and accumulate it. Strategies such as selenium and silicon applications have been suggested to decrease Cd toxicity, with mechanisms like vacuolar sequestration, formation of phytochelatins, and cell wall adsorption reported as effective for detoxification. This review discusses past and current literature to better understand Cd toxicity and its mitigation through different feasible and practical approaches.
Review
Environmental Sciences
Anamika Kushwaha, Lalit Goswami, Jechan Lee, Christian Sonne, Richard J. C. Brown, Ki-Hyun Kim
Summary: Selenium is an essential micronutrient with anti-oxidative properties, but contamination and bioaccumulation of selenium can be harmful to the environment and human health. Various technologies have been developed for remediation, but challenges such as establishing discharge limits remain. This review focuses on the factors governing selenium distribution and behavior in the environment, offering valuable insights for effective control options.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Stefan Schmollinger, Si Chen, Daniela Strenkert, Colleen Hui, Martina Ralle, Sabeeha S. Merchant
Summary: The acidocalcisome is an acidic organelle in the cytosol of eukaryotes, characterized by its low pH and high calcium and polyphosphate content. XFM allows for accurate measurement of trace metal content within acidocalcisomes, with studies showing that up to 70% of cellular copper and 80% of iron can be sequestered in these organelles during trace metal overaccumulation. Additionally, XFM can distinguish between different populations of acidocalcisomes based on their unique elemental makeup.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Review
Plant Sciences
Mohd Ishfaq Khan, Shahzad A. Pandith, Manzoor A. Shah, Zafar A. Reshi
Summary: From simple algal forms to the most advanced angiosperms, calcium oxalate (CaOx) crystals (CRs) are found in majority of photosynthetic organisms. Various studies have shown that CaOx biomineralization is genetically regulated and not a random event. They have roles in calcium regulation, detoxification, light reflectance, protection against grazing, and other functions, making it important to understand their synthesis and regulation in relation to potential crop improvement and climate change. This review critically addresses the origin, synthesis, significance, regulation, and fate of CaOx CRs in plants and soil, presenting them as potential biominerals for future climate-driven issues.
PLANT AND CELL PHYSIOLOGY
(2023)
Review
Environmental Sciences
Kanika Khanna, Sukhmeen Kaur Kohli, Puja Ohri, Renu Bhardwaj, Parvaiz Ahmad
Summary: Cadmium is a toxic pollutant that persists in soil and has negative effects on plant growth and metabolism. Plants have developed antioxidative defense responses and specific mechanisms to combat cadmium stress. Additionally, plant hormones play a crucial role in signal transduction pathways and overall growth and development of plants under toxic conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)