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Zhang X, Xu H, Tang J, Yang J, Guo Z, Xiao Y, Ge Y, Liu T, Hu Q, Ao H, Shi W. Cadmium absorption and translocation in rice plants are influenced by lower air temperatures during grain filling stage. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 954:176742. [PMID: 39374702 DOI: 10.1016/j.scitotenv.2024.176742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 09/13/2024] [Accepted: 10/03/2024] [Indexed: 10/09/2024]
Abstract
The increasing frequency and severity of low temperatures, and soil cadmium (Cd) pollution threaten food security. However, the interactive effects of Cd exposure and low temperatures on rice yield and quality, as well as the mechanisms of Cd absorption and translocation, remain unclear. In this study, two rice varieties were cultivated in soils with two Cd contamination levels (Cdhigh and Cdlow) and exposed to control (CT25) or lower temperatures of 20 °C (LT20) and 17 °C (LT17) during grain-filling stage. Results showed significant decreases in seed setting rate and grain weight, reduced head rice yield, and increased chalkiness due to low temperatures, particularly in Cdhigh soils. Compared to CT25, LT17 and LT20 increased Cd concentration by 37.6 % and accumulation by 14.8 % in grains grown in Cdhigh soils. Enhanced root activity and upregulation of OsNramp1 and OsNramp5 under both low-temperatures increased Cd levels in roots. Lower temperatures also decreased phytochelatins (PCs) and increased expression of OsHMA2 and OsCAL1, facilitating Cd transport and raising Cd levels in stems. Furthermore, upregulated OsHMA2, OsLCT1, and OsZIP7 in stems under low-temperatures promoted Cd transport to panicles. Overall, low temperatures during grain filling increased Cd uptake and translocation into rice grains, especially in high Cd contaminated soils, raising health risks. The study highlights the need to address climate change's impact on cadmium hazards in rice.
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Affiliation(s)
- Xinzhen Zhang
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Hang Xu
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Jiangying Tang
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Juan Yang
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Zhiqiang Guo
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Yang Xiao
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Yulu Ge
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Tian Liu
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Qian Hu
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China
| | - Hejun Ao
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China.
| | - Wanju Shi
- College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128, China; Hunan Engineering Research Center for Low Cadmium Accumulation in Rice, Changsha, Hunan 410128, China; Yuelushan Laboratory, Changsha, Hunan 410128, China.
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Elevated CO 2 may increase the health risks of consuming leafy vegetables cultivated in flooded soils contaminated with Cd and Pb. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:49733-49743. [PMID: 36781664 DOI: 10.1007/s11356-023-25863-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 02/06/2023] [Indexed: 02/15/2023]
Abstract
Elevated CO2 levels threat the crop quality by altering the environmental behavior of heavy metals (HMs) in soils. In reality, multiple HMs often co-exist in field, while details regarding coexisting HMs migration in flooded soil at elevated CO2 levels remain unclear. A pot experiment in open-top chambers (CO2 at 400 and 600 μmol mol-1) was conducted to explore the uptake and transfer of cadmium (Cd) and lead (Pb) in water dropwort (Oenanthe javanica DC.) grown in flooded soils contaminated with Cd and Pb. Results showed that elevated CO2 significantly reduced soil pH, promoting the release of Cd and Pb (by 63.64-106.90% and 10.66-30.99%, respectively) into soil porewater. In the harvested O. javanica, elevated CO2 decreased the root uptake of Cd but promoted that of Pb. Further mechanism analysis showed that elevated CO2 promoted the formation of iron plaque on root surface by 44.60-139.57%, with lower adsorption capacity to HMs (0-34.93% and 63.61-67.69% for Cd and Pb, respectively). Meanwhile, Pb showed lower adsorbability in iron plaque but higher transfer capacity when compared with Cd. Ultimately, elevated CO2 increased the target hazard quotient values of Pb in O. javanica. These findings provide new insights on the effects of elevated CO2 on the transfer of coexisting HMs in soil-plant system, and the risk of HMs pollution under climate changes needs to be more fully assessed.
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Huang M, Nhung NTH, Wu Y, He C, Wang K, Yang S, Kurokawa H, Matsui H, Dodbiba G, Fujita T. Different nanobubbles mitigate cadmium toxicity and accumulation of rice (Oryza sativa L.) seedlings in hydroponic cultures. CHEMOSPHERE 2023; 312:137250. [PMID: 36423719 DOI: 10.1016/j.chemosphere.2022.137250] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 11/11/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
Cadmium (Cd) contamination can pose a severe threat to food production and human health. The accumulation of Cd in rice will decrease rice biomass, photosynthetic activity, and antioxidant capacity, affecting crop yield. The effects of different nanobubbles on the growth and Cd accumulation of rice seedlings under hydroponic conditions were investigated in this study. The results showed that the biomass, photosynthetic pigment content, and antioxidant enzyme activity of rice seedlings decreased when treated with Cd alone and that Cd induced lipid peroxidation in rice seedlings. However, when different types of nanobubbles were introduced into the nutrient solution, the bioavailability of Cd in the solution was reduced. As a result, the Cd content in rice was significantly decreased compared to treatment with Cd alone. Nanobubbles increased the biomass of rice, enhanced photosynthesis, and improved the antioxidant capacity of rice by increasing antioxidant enzyme activities to alleviate Cd-induced oxidative stress. At the same time, nanobubbles increased the Fe content in rice, which decreased the Cd content, as Cd is antagonistic to Fe. In conclusion, these results suggested that nanobubbles are a potential method of mitigating Cd stress that may help to improve rice yield and could be further explored in production.
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Affiliation(s)
- Minyi Huang
- College of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Nguyen Thi Hong Nhung
- College of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Yongxiang Wu
- College of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Chunlin He
- College of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Kaituo Wang
- College of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
| | - Shangdong Yang
- Agricultural College, Guangxi University, Nanning, 530004, China
| | - Hiromi Kurokawa
- Algae Biomass Energy System R&D Center (ABES), University of Tsukuba, Tsukuba, 305-8572, Japan
| | - Hirofumi Matsui
- Faculty of Medicine, University of Tsukuba, Tsukuba, 305-8575, Japan
| | - Gjergj Dodbiba
- Graduate School of Engineering, The University of Tokyo, Bunkyo, 113-8656, Japan
| | - Toyohisa Fujita
- College of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China.
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Bruno LB, Anbuganesan V, Karthik C, Kumar A, Banu JR, Freitas H, Rajkumar M. Enhanced phytoextraction of multi-metal contaminated soils under increased atmospheric temperature by bioaugmentation with plant growth promoting Bacillus cereus. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 289:112553. [PMID: 33857710 DOI: 10.1016/j.jenvman.2021.112553] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/01/2021] [Accepted: 04/04/2021] [Indexed: 06/12/2023]
Abstract
The co-occurrence of environmental stresses such as heavy metals (HM) and increased atmospheric temperature (IAT) pose serious implications on plant growth and productivity. In this work, we evaluated the role of plant growth-promoting bacteria (PGPB) and its effectiveness on Zea mays growth, stress tolerance and phytoremediation potential in multi-metal (MM) contaminated soils under IAT stress conditions. The PGPB strain TCU11 was isolated from metal contaminated soils and identified as Bacillus cereus. TCU11 was able to resist abiotic stresses such as IAT (45 °C), MM (Pb, Zn, Ni, Cu, and Cd), antibiotics and induced in vitro plant growth promotion (PGP) by producing siderophores (catechol and hydroxymate) and indole 3-acetic acid even in the presence of MM under IAT. Inoculation of TCU11 significantly increased the biomass, chlorophyll, carotenoids, and protein content of Z. mays compared to the respective control under MM, IAT, and MM + IAT stress. A decrease of malondialdehyde and over-accumulation of total phenolics, proline along with the increased activity of superoxide dismutase, catalase and ascorbic peroxidase were observed in TCU11 inoculated plants under stress conditions. These results suggested MM and/or IAT significantly reduced the maize growth, whereas TCU11 inoculation mitigated the combined stress effects on maize performance. Moreover, the inoculation of TCU11 under IAT stress increased the MM (Pb, Zn, Ni, Cu, and Cd) accumulation in plant tissues and also increased the translocation of HM from root to shoot except for Ni. The results of soil HM mobilization further indicates that IAT increased the HM mobilizing activity of TCU11, thus increasing the concentrations of bio-available HM in soil. These results suggested that TCU11 not only alleviates MM and IAT stresses but also enhances the biomass production and HM accumulation in plants. Therefore, TCU11 can be exploited as inoculums for improving the phytoremediation efficiency in MM polluted soils under IAT conditions.
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Affiliation(s)
- L Benedict Bruno
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641046, India
| | - Vadivel Anbuganesan
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641046, India
| | - Chinnannan Karthik
- Department of Agronomy, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Zhejiang Province, China
| | - Adarsh Kumar
- Laboratory of Biotechnology, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russia
| | - J Rajesh Banu
- Department of Life Sciences, Central University of Tamilnadu, Tiruvarur, 610 005, India
| | - Helena Freitas
- Centre for Functional Ecology - Science for People & the Planet, Department of Life Sciences, University of Coimbra, 3000-456, Coimbra, Portugal
| | - Mani Rajkumar
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641046, India.
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Balfagón D, Zandalinas SI, Gómez-Cadenas A. High temperatures change the perspective: Integrating hormonal responses in citrus plants under co-occurring abiotic stress conditions. PHYSIOLOGIA PLANTARUM 2019; 165:183-197. [PMID: 30091288 DOI: 10.1111/ppl.12815] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 07/23/2018] [Accepted: 07/26/2018] [Indexed: 05/15/2023]
Abstract
Plants growing in the field are subjected to multiple stress factors acting simultaneously. Abnormally high temperatures are expected to affect wild plants and crops in the next years due to global warming. In this work, we have studied physiological, hormonal and molecular responses of the citrus rootstock, Carrizo citrange (Poncirus trifoliata L. Raf. × Citrus sinensis L. Osb.) subjected to wounding or high salinity occurring individually or in combination with heat stress. According to our results, combination of high salinity and heat stress aggravated the negative effects of salt intoxication in Carrizo. The high transpiration rate caused by high temperatures counteracted physiological responses of plants to salt stress and increased Cl- intake in leaves. In addition, 12-oxo-phytodienoic acid accumulated specifically under combination of wounding and heat stress, whereas at low temperatures, wounded plants accumulated jasmonic acid (JA) and JA-isoleucine (JA-Ile). Moreover, an antagonism between salicylic acid (SA) and JA was observed, and wounded plants subjected to high temperatures did not accumulate JA nor JA-Ile whereas SA levels increased (via isochorismate synthase biosynthetic pathway). Wounded plants did not accumulate abscisic acid (ABA) but its catabolite phaseic acid. This could act as a signal for the upregulation of (ABA)-RESPONSIVE ELEMENT (ABRE)-BINDING TRANSCRIPTION FACTOR 2 (CsAREB2) and RESPONSIVE TO DISSECATION 22 (CsRD22) in an ABA-independent way. This work uncovers some mechanisms that explain Carrizo citrange tolerance to high temperatures together with different hormonal signals in response to specific stresses. It is suggested that co-occurring abiotic stress conditions can modify (either enhance or reduce) the hormonal response to modulate specific responses.
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Affiliation(s)
- Damián Balfagón
- Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, 12071, Castelló de la Plana, Spain
| | - Sara I Zandalinas
- Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, 12071, Castelló de la Plana, Spain
| | - Aurelio Gómez-Cadenas
- Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, 12071, Castelló de la Plana, Spain
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Zandalinas SI, Mittler R, Balfagón D, Arbona V, Gómez-Cadenas A. Plant adaptations to the combination of drought and high temperatures. PHYSIOLOGIA PLANTARUM 2018; 162:2-12. [PMID: 28042678 DOI: 10.1111/ppl.12540] [Citation(s) in RCA: 393] [Impact Index Per Article: 65.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 11/25/2016] [Accepted: 12/01/2016] [Indexed: 05/18/2023]
Abstract
Under field conditions crops are routinely subjected to a number of different abiotic stress factors simultaneously. Recent studies revealed that the response of plants to a combination of different abiotic stresses is unique and cannot be directly extrapolated from simply studying each of the different stresses applied individually. These studies have also identified specific regulatory transcripts, combinations of metabolites and proteins, and physiological responses that are unique to specific stress combinations, highlighting the importance of studying abiotic stress combination in plants. Here we describe the interactions between drought and other abiotic stresses with emphasis on drought and heat stress. We compile new data about the different molecular, physiological and metabolic adaptations of different plants and crops to this stress combination and we highlight the importance of reactive oxygen species (ROS) metabolism and stomatal responses for plant acclimation to drought and heat stress combination. We further emphasize the need for developing crops with enhanced tolerance to drought and heat stress combination in order to mitigate the negative impacts of predicted global climatic changes on agricultural production worldwide.
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Affiliation(s)
- Sara I Zandalinas
- Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, Castelló de la Plana 12071, Spain
| | - Ron Mittler
- Department of Biological Sciences, College of Arts and Sciences, University of North Texas, Denton, TX 76203-5017, USA
| | - Damián Balfagón
- Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, Castelló de la Plana 12071, Spain
| | - Vicent Arbona
- Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, Castelló de la Plana 12071, Spain
| | - Aurelio Gómez-Cadenas
- Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, Castelló de la Plana 12071, Spain
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