1
|
Yu Y, Alseekh S, Zhu Z, Zhou K, Fernie AR. Multiomics and biotechnologies for understanding and influencing cadmium accumulation and stress response in plants. PLANT BIOTECHNOLOGY JOURNAL 2024. [PMID: 38817148 DOI: 10.1111/pbi.14379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 03/04/2024] [Accepted: 05/03/2024] [Indexed: 06/01/2024]
Abstract
Cadmium (Cd) is one of the most toxic heavy metals faced by plants and, additionally, via the food chain, threatens human health. It is principally dispersed through agro-ecosystems via anthropogenic activities and geogenic sources. Given its high mobility and persistence, Cd, although not required, can be readily assimilated by plants thereby posing a threat to plant growth and productivity as well as animal and human health. Thus, breeding crop plants in which the edible parts contain low to zero Cd as safe food stuffs and harvesting shoots of high Cd-containing plants as a route for decontaminating soils are vital strategies to cope with this problem. Recently, multiomics approaches have been employed to considerably enhance our understanding of the mechanisms underlying (i) Cd toxicity, (ii) Cd accumulation, (iii) Cd detoxification and (iv) Cd acquisition tolerance in plants. This information can be deployed in the development of the biotechnological tools for developing plants with modulated Cd tolerance and detoxification to safeguard cellular and genetic integrity as well as to minimize food chain contamination. The aim of this review is to provide a current update about the mechanisms involved in Cd uptake by plants and the recent developments in the area of multiomics approach in terms of Cd stress responses, as well as in the development of Cd tolerant and low Cd accumulating crops.
Collapse
Affiliation(s)
- Yan Yu
- School of Agronomy, Anhui Agricultural University, Hefei, China
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Saleh Alseekh
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv, Bulgaria
| | - Zonghe Zhu
- School of Agronomy, Anhui Agricultural University, Hefei, China
| | - Kejin Zhou
- School of Agronomy, Anhui Agricultural University, Hefei, China
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv, Bulgaria
| |
Collapse
|
2
|
Sorour AA, Badr R, Mahmoud N, Abdel-Latif A. Cadmium and zinc accumulation and tolerance in two Egyptian cultivars (S53 and V120) of Helianthus annuus L. as potential phytoremediator. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2024; 26:1643-1654. [PMID: 38644603 DOI: 10.1080/15226514.2024.2343842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
One of the most important oil crops in the world, sunflower (Helianthus annuus L.), is recognized to help in soil phytoremediation. Heavy metal (HM) contamination is one of the most abiotic challenges that may affect the growth and productivity of such an important crop plant. We studied the influence of HM-contaminated soils on metal homeostasis and the potential hypertolerance mechanisms in two sunflower Egyptian cultivars (V120 and S53). Both cultivars accumulated significantly higher cadmium concentrations in their roots compared to their shoots during Cd and Zn/Cd treatments. Higher root concentrations of 121 mg g-1 dry weight (DW) and 125 mg g-1 DW were measured in V120 plants compared to relatively lower values of 111 mg g-1 DW and 105 mg g-1 DW in the roots of S53 plants, respectively. Cadmium contamination significantly upregulated the expression of heavy metal ATPases (HaHMA4) in the shoots of V120 plants. On the other hand, their roots displayed a notable expression of HaHMA3. This study indicates that V120 plants accumulated and sequestered Cd in their roots. Therefore, it is advised to cultivate the V120 cultivar in areas contaminated with heavy metals as it is a promising Cd phytoremediator.
Collapse
Affiliation(s)
- Ahmed A Sorour
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Reem Badr
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Nermen Mahmoud
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Amani Abdel-Latif
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt
| |
Collapse
|
3
|
Li C, Zhang J, Li Q, Chen Z, Hou X, Zhao C, Guo Q. IlNRAMP5 is required for cadmium accumulation and the growth in Iris lactea under cadmium exposures. Int J Biol Macromol 2023; 253:127103. [PMID: 37769763 DOI: 10.1016/j.ijbiomac.2023.127103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 10/02/2023]
Abstract
Iris lactea is potentially applied for remediating Cd-contaminated soils due to the strong ability of Cd uptake and accumulation. However, its molecular mechanism underlying Cd uptake pathway remains unknown. Here, we report a member of NRAMP (Natural Resistance-Associated Macrophage Protein) family, IlNRAMP5, is involved in Cd/Mn uptake and the growth in I. lactea response to Cd. IlNRAMP5 was localized onto the plasma membrane, and was induced by Cd. It was expressed in the root cortex rather than the central vasculature, and in leaf vascular bundle and mesophyll cells. Heterologous expression in yeast showed that IlNRAMP5 could transport Cd and Mn, but not Fe. Knockdown of IlNRAMP5 triggered a significant reduction in Cd uptake, further diminishing the accumulation of Cd. In addition, silencing IlNRAMP5 disrupted Mn homeostasis by lowering Mn uptake and Mn allocation, accompanied by remarkably inhibiting photosynthesis under Cd conditions. Overall, the findings suggest that IlNRAMP5 plays versatile roles in Cd accumulation by mediating Cd uptake, and contributes to maintain the growth via modulating Mn homeostasis in I. lactea under Cd exposures. This would provide a mechanistic understanding Cd phytoremediation efficiency in planta.
Collapse
Affiliation(s)
- Cui Li
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Jia Zhang
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Qidong Li
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Zhimin Chen
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Xincun Hou
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Chunqiao Zhao
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Qiang Guo
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
| |
Collapse
|
4
|
Sun J, Tian K, Jing L, Niu Y, Lou Q, Chen H. Identification of characteristic aroma compounds for spicy in Iris lactea var. chinensis. PHYSIOLOGIA PLANTARUM 2023; 175:e14016. [PMID: 37882258 DOI: 10.1111/ppl.14016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 08/19/2023] [Indexed: 10/27/2023]
Abstract
Iris lactea var. chinensis (Fisch.) Koidz has a unique floral fragrance that differs from that of other Iris spp.; however, its characteristic aroma composition remains unknown. This study aimed to identify the floral fragrance components of I. lactea var. chinensis during different flowering stages using headspace solid-phase microextraction in conjunction with gas chromatography mass spectrometry, electronic nose, and sensory evaluation. During the three flowering phases (bud stage, bloom stage, and decay stage), 70 volatile organic compounds (VOCs), including 13 aldehydes, 13 esters, 11 alcohols, 10 alkanes, 8 ketones, 7 terpenes, 7 benzenoids, and 1 nitrogenous compound, were identified. According to principal component analysis, the primary VOCs were (-)-pinene, β-irone, methyl heptenone, phenylethanol, hexanol, and 2-pinene. A comparison of the differential VOCs across the different flowering stages using orthogonal partial least squares discriminant analysis and hierarchical clustering analysis revealed that 3-carene appeared only in the bud stage, whereas hexanol, ethyl caprate, ethyl caproate, linalool, (-)-pinene, and 2-pinene appeared or were present at significantly increased levels during the bloom stage. The phenylethanol, methyl heptenone, 3-methylheptane, and β-irone reached a peak in the decay stage. The odor activity value and sensory evaluation suggested that "spicy" is the most typical odor of I. lactea var. chinensis, mainly due to 2-methoxy-3-sec-butylpyrazine, which is rare in floral fragrances.
Collapse
Affiliation(s)
- Junming Sun
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Kexin Tian
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Lu Jing
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Yafei Niu
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Qian Lou
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Hongwu Chen
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| |
Collapse
|
5
|
Naing AH, Park DY, Park HC, Kim CK. Removal of heavy metals using Iris species: A potential approach for reclamation of heavy metal-polluted sites and environmental beautification. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27732-5. [PMID: 37303013 DOI: 10.1007/s11356-023-27732-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 05/13/2023] [Indexed: 06/13/2023]
Abstract
Globally, the number of heavy metal (HM)-polluted sites has increased rapidly in recent years, posing a serious threat to agricultural productivity, human health, and environmental safety. Hence, it is necessary to remediate HM-polluted sites to increase cultivatable lands for agricultural productivity, prevent hazardous effects to human health, and promote environmental safety. Removal of HMs using plants (phytoremediation) is a promising method as it is eco-friendly. Recently, ornamental plants have been widely used in phytoremediation programs as they can simultaneously eliminate HMs and are aesthetically pleasing. Among the ornamental plants, Iris species are frequently used; however, their role in HM remediation has not been reviewed yet. Here, the importance of Iris species in the ornamental industry and their different commercial aspects are briefly described. Additionally, the mechanisms of how the plant species absorb and transport the HMs to the above-ground tissues and tolerate HM stress are highlighted. The variation in HM remediation efficiency depending on the plant species, HM type and concentration, use of certain supplements, and experimental conditions are also discussed. Iris species are able to remove other hazards as well, such as pesticides, pharmaceutical compounds, and industrial wastes, from polluted soils or waste-water. Owing to the valuable information presented in this review, we expect more applications of the species in reclaiming polluted sites and beautifying the environment.
Collapse
Affiliation(s)
- Aung Htay Naing
- Department of Horticulture, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Da Young Park
- Ecological Technology Research Team, Division of Ecological Applications Research, National Institute of Ecology, Seocheon, 33657, Republic of Korea
| | - Hyeong Cheol Park
- Ecological Technology Research Team, Division of Ecological Applications Research, National Institute of Ecology, Seocheon, 33657, Republic of Korea
| | - Chang Kil Kim
- Department of Horticulture, Kyungpook National University, Daegu, 41566, Republic of Korea.
| |
Collapse
|
6
|
Emenike EC, Iwuozor KO, Anidiobi SU. Heavy Metal Pollution in Aquaculture: Sources, Impacts and Mitigation Techniques. Biol Trace Elem Res 2022; 200:4476-4492. [PMID: 34813030 DOI: 10.1007/s12011-021-03037-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/15/2021] [Indexed: 01/28/2023]
Abstract
Aquaculture is one of the fastest growing agro-industries as it presently accounts for nearly 50% of all fish for direct human consumption and 43% of total seafood supply. Fish provide about 20% average daily intake of animal protein for about 3.2 billion people globally. The treatment of aquaculture in recent years for the mitigation of heavy metals and other contaminants has been gaining traction due to the benefits of aquaculture to both man and the environment. This paper provides a review of the sources, impacts, and the various methods that have been deployed in recent years by various researchers for the treatment of heavy metal contaminated aquaculture. Related works of literature were obtained and compiled from academic search databases and were carefully analysed in this study. The dangers these metals pose to the sustainability of aquaculture were studied in this review. Studies indicate that some heavy metals, such as mercury, lead, and cadmium, due to their long-term persistence in the environment, allow them to accumulate in the food chain. Mitigation techniques such as adsorption, bio-sorption, and phytoremediation have been deployed for the treatment of heavy metal contaminated aquaculture. Some research gaps were also highlighted which could form the basis for future research, such as research centred on the effects of these metals on the embryonic development of aquaculture organisms and the alterations the metals caused in their stages of development.
Collapse
Affiliation(s)
- Ebuka Chizitere Emenike
- Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, P. M. B. 5025, Awka, Nigeria.
| | - Kingsley O Iwuozor
- Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, P. M. B. 5025, Awka, Nigeria.
| | - Stella Ukamaka Anidiobi
- Department of Chemistry, University of Lagos, P. M. B. 1029, Lagos, Nigeria
- Federal College of Fisheries and Marine Technology, Lagos, Nigeria
| |
Collapse
|
7
|
Screening and Identification of Host Proteins Interacting with Iris lactea var. chinensis Metallothionein IlMT2a by Yeast Two-Hybrid Assay. Genes (Basel) 2021; 12:genes12040554. [PMID: 33920321 PMCID: PMC8069374 DOI: 10.3390/genes12040554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/03/2021] [Accepted: 04/07/2021] [Indexed: 11/17/2022] Open
Abstract
Iris lactea var. chinensis (Fisch.) (I. lactea var. chinensis) is a well-known cadmium (Cd)-tolerant plant and we have previously shown that the metallothionein gene, IlMT2a, of the plant may be playing a key role in conferring the Cd tolerance. In this study, we have identified several proteins interacting with the IlMT2a by screening yeast two-hybrid library constructed from cDNAs isolated from Cd-treated I. lacteal var. chinensis plants. Putative functions of these proteins include those involved in photosynthesis, ROS scavenge, nutrient transport, and transcriptional regulation, to name a few. In particular, another metallothionein, which we assigned the name of IlMT3, was identified as an interacting partner of the IlMT2a. Unlike IlMT2a, it did not provide any significant protection against Cd toxicity in transgenic Arabidopsis thaliana L. (A. thaliana). To our knowledge, this is the first time ever reporting the interaction of two metallothionein proteins in plants. Learning the biological significance of the interaction between IlMT2a and IlMT3 would be the focus of future study and would be able to provide valuable insights into the understanding plant metallothionein’s diverse and complex roles in coordinating many important cellular physiologies including stress responses, gene regulations, and energy metabolisms.
Collapse
|
8
|
He M, Tian Z, Liu Q, Guo Y. Trichoderma asperellum promotes cadmium accumulation within maize seedlings. BIOTECHNOL BIOTEC EQ 2021. [DOI: 10.1080/13102818.2021.1997155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Mengting He
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
| | - Zengyuan Tian
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
| | - Qianqian Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
| | - Yuqi Guo
- School of Life Sciences, Zhengzhou University, Zhengzhou, Henan, PR China
| |
Collapse
|
9
|
Liu Q, Zhang Y, Wang Y, Wang W, Gu C, Huang S, Yuan H, Dhankher OP. Quantitative proteomic analysis reveals complex regulatory and metabolic response of Iris lactea Pall. var. chinensis to cadmium toxicity. JOURNAL OF HAZARDOUS MATERIALS 2020; 400:123165. [PMID: 32569986 DOI: 10.1016/j.jhazmat.2020.123165] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 05/13/2020] [Accepted: 06/06/2020] [Indexed: 05/28/2023]
Abstract
Cadmium pollution has become a serious environmental problem. Iris lactea var. chinensis showed strong Cd tolerance and accumulation ability, which has significant potential to be applied for the phytoremediation of Cd-contaminated soil. However, the lack of molecular information on the mechanism of I. lactea response to Cd limited the improvement of phytoremediation efficiency. In this study, label-free proteomics analysis of Cd response in I. lactea showed that there were 163 and 196 differentially expressed proteins (DEPs) in the shoots and roots, respectively. Bioinformatics analysis indicated the DEPs responding to Cd stress mainly involved in signal transduction, ion transport, redox etc., and participate in the pathway of amino acid biosynthesis, lignin biosynthesis, glycerolipid metabolism and glutathione metabolism. Besides, differential expression of seven DEPs was validated via gene expression analysis. Finally, we found that a Cd-induced mannose-specific lectin (IlMSL) from I. lactea enhanced the Cd sensitivity and increased Cd accumulation in yeast. The results of this study will enhance our understanding of the molecular mechanism of Cd tolerance and accumulation in I. lactea and ultimately provide valuable resources for using Cd tolerant genes for developing efficient strategies for phytoremediation of Cd-contaminated soils or limiting Cd accumulation in food crops.
Collapse
Affiliation(s)
- Qingquan Liu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Yongxia Zhang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Yinjie Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Weilin Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Chunsun Gu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Suzhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Haiyan Yuan
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China.
| | - Om Parkash Dhankher
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, MA 01003, USA.
| |
Collapse
|
10
|
Hrkić Ilić Z, Pajević S, Borišev M, Luković J. Assessment of phytostabilization potential of two Salix L. clones based on the effects of heavy metals on the root anatomical traits. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:29361-29383. [PMID: 32440877 DOI: 10.1007/s11356-020-09228-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Willow species (Salix L.) are a useful tool for assessing phytostabilization of the sites polluted by heavy metals. Phytostabilization potential of two willow genotypes (Salix alba L. clone '68/53/1' and Salix nigra Marshall clone '0408') has been evaluated in a 45-day hydroponic experiment, using stem cuttings (diameter 12 to 14 mm, length 20 cm) exposed to two concentrations (10-4 M and 10-5 M) of individually applied Cd, Ni, and Pb. Metals were diluted in 25% Hoagland's solution, in forms of CdCl2·H2O, NiSO4·6H2O, and Pb-EDTA. The control group of cuttings was grown in 25% Hoagland's solution without heavy metals. High Cd concentrations in willow roots, 8637 mg/kg (clone '68/53/1') and 6728 mg/kg of dry weight (clone '0408'), have indicated a high phytostabilization potential. However, detailed analyses of cross-sectional area of the root cortex and the central cylinder revealed that the excess concentration of Cd led to a significant reduction of measured anatomical root's traits of clone '68/53/1' in comparison with the control samples. Excessive concentration of Ni and Pb in nutrient solution increased the values of quantitatively measured root's traits of clone '0408', implying stimulatory effects of the applied concentrations. Concentration of 10-4 M of each metal had more negative effects on the roots' anatomical traits, notably on parenchymal and exodermal cells and vessels. Deposits of metals were observed in root tissues. Clone '0408' demonstrated an increased tolerance to heavy metals, which could potentially make this clone useful in phytostabilization.
Collapse
Affiliation(s)
- Zorana Hrkić Ilić
- Faculty of Forestry, University of Banja Luka, Bulevar Vojvode Stepe Stepanovića 75A, 78000, Banja Luka, Bosnia and Herzegovina.
| | - Slobodanka Pajević
- University of Novi Sad Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, Novi Sad, 21000, Serbia
| | - Milan Borišev
- University of Novi Sad Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, Novi Sad, 21000, Serbia
| | - Jadranka Luković
- University of Novi Sad Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, Novi Sad, 21000, Serbia
| |
Collapse
|
11
|
Yáñez-Espinosa L, Briones-Gallardo R, Flores J, Álvarez Del Castillo E. Effect of heavy metals on seed germination and seedling development of Nama aff. stenophylla collected on the slope of a mine tailing dump. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 22:1448-1461. [PMID: 32603186 DOI: 10.1080/15226514.2020.1781782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nama aff. stenophylla plants grow on mining waste abandoned 100 years ago, exposed to high concentrations of heavy metals. Accumulation of heavy metals in plant biomass has been related to the phyto-accessible fractions of these, so we assessed the effect of those heavy metals in different concentrations on the germination and development of seedlings. The seed traits were characterized with optical and scanning electron microscope. The seeds were assessed for dormancy by pre-germinative treatments, germination percentage, tolerance index regarding heavy metals, and the elongation of seedlings under three concentrations of arsenic (As), cadmium (Cd), Iron (Fe), lead (Pb), and zinc (Zn) (phyto-accessible [Ph], five times higher [Hi] and lower [Lo]). The seeds have no dormancy, and the heavy metals did not affect the embryo. Pb, Cd, and As, affected the germination percentage more (p < 0.005). The treatments that most affected seedling elongation were Zn [Hi], Cd [Hi], Pb [Lo], Zn [Ph], Pb [Hi], Zn [Lo] (p < 0.005). The seedlings cells alterations were associated with the reduction in length, although larger cortical cells may be due to heavy metal compartmentalization in vacuoles. The seeds and seedlings showed tolerance to high concentrations of Fe and As, and to phyto-accessible of As, Cd, Pb, and Fe.
Collapse
Affiliation(s)
- Laura Yáñez-Espinosa
- Instituto de Investigación deZonas Desérticas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
| | | | - Joel Flores
- Consorcio de Investigación, Innovación y Desarrollo para las Zonas Áridas, San Luis Potosí, México
- División de Ciencias Ambientales, Instituto Potosino de Investigación científica y Tecnológica, San Luis Potosí, México
| | | |
Collapse
|
12
|
Effect of Molybdenum on Plant Physiology and Cadmium Uptake and Translocation in Rape ( Brassica napus L.) under Different Levels of Cadmium Stress. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17072355. [PMID: 32244320 PMCID: PMC7177489 DOI: 10.3390/ijerph17072355] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 11/16/2022]
Abstract
This study investigated the beneficial effect of molybdenum (Mo) application on rape plants (Brassica napus L.) grown in a soil polluted by cadmium (Cd). A pot experiment was conducted to determine how different concentrations of exogenous Mo (0, 50, 100, and 200 mg/kg) affect plant physiology, biomass, photosynthesis, cation uptake, and Cd translocation and enrichment in rape plants under Cd stress (0.5 and 6.0 mg/kg). Under single Cd treatment, plant physiological and biochemical parameters, biomass parameters, leaf chlorophyll fluorescence parameters, and macroelement uptake of rape plants decreased, while their malonaldehyde content, proline content, non-photochemical quenching coefficient, and Cd uptake significantly increased, compared to those of the control group (p-values < 0.05). High-Cd treatment resulted in much larger changes in these parameters than low-Cd treatment. Following Mo application, the accumulation of malondialdehyde and proline decreased in the leaves of Cd-stressed plants; reversely, the contents of soluble protein, soluble sugar, and chlorophyll, and the activities of superoxide dismutase and glutathione peroxidase, all increased compared to those of single Cd treatment (p-values < 0.05). Exogenous Mo application promoted shoot and root growth of Cd-stressed plants in terms of their length, fresh weight, and dry weight. The negative effect of Cd stress on leaf chlorophyll fluorescence was substantially mitigated by applying Mo. Exogenous Mo also improved the uptake of inorganic cations, especially potassium (K+), in Cd-stressed plants. After Mo application, Cd uptake and accumulation were inhibited and Cd tolerance was enhanced, but Cd translocation was less affected in Cd-stressed plants. The mitigation effect of Mo on Cd stress in rape was achieved through the immobilization of soil Cd to reduce plant uptake, and improvement of plant physiological properties to enhance Cd tolerance. In conclusion, exogenous Mo can effectively reduce Cd toxicity to rape and the optimal Mo concentration was 100 mg/kg under the experimental conditions.
Collapse
|
13
|
Hatamian M, Nejad AR, Kafi M, Souri MK, Shahbazi K. Nitrate improves hackberry seedling growth under cadmium application. Heliyon 2020; 6:e03247. [PMID: 31993522 PMCID: PMC6971396 DOI: 10.1016/j.heliyon.2020.e03247] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/27/2019] [Accepted: 01/14/2020] [Indexed: 11/25/2022] Open
Abstract
The environmental toxicity of heavy metals in particular cadmium is a public concern. Cadmium is toxic for all living organisms including plants; however, plant species may show different tolerance to the presence of cadmium in their root medium. Adopting practical strategies may reduce cadmium bioavailability or increase the plant tolerance. In the present study, interaction of nitrate was investigated on cadmium treatment in hackberry (Celtis australis L.) seedlings. Different levels of nitrate (0, 50 and 100 mg/L) and cadmium (0 and 5 mg/L) were applied to seedlings via irrigation water during two consequence years. The treatments were arranged in a factorial with completely randomized design in four replications. The results of ANOVA showed that the cadmium-nitrate interaction was significant on leaf Cd concentration and root dry weight at P = 0.01, and on carotenoids and leaf dry weight at P = 0.05, while it was not significant on the rest of traits. Application of cadmium had no significant effect on new shoot growth, leaf chlorophyll and leaf fresh weight; however, it significantly reduced stomatal water conductance and photosynthesis rate, while it increased leaf transpiration rate, root and stem fresh weights, leaf Cd and proline concentrations. Application of nitrate levels, on the other hand, constantly increased the leaf nitrate concentration, new shoot growth, leaf fresh and dry weights, root fresh weight, stomatal water conductance and photosynthesis rate, whereas it reduced the necrotic points of leaves. The results indicated that the growth characteristics of hackberry seedlings were mainly influenced by nitrate but not cadmium application, and this ornamental tree is a tolerant species to high soil Cd levels.
Collapse
Affiliation(s)
- Mansoure Hatamian
- Dept. of Horticultural Sciences, Faculty of Agriculture, Lorestan University, Khorramabad, Iran
| | | | - Mohsen Kafi
- Dept. of Horticulture, University of Tehran, Karaj, Iran
| | | | - Karim Shahbazi
- Soil and Water Research Institute, Education and Extension Organization (AREEO), Tehran, Iran
| |
Collapse
|
14
|
Sun Y, Lu Q, Cao Y, Wang M, Cheng X, Yan Q. Comparative Transcriptome Analysis of the Molecular Mechanism of the Hairy Roots of Brassica campestris L. in Response to Cadmium Stress. Int J Mol Sci 2019; 21:ijms21010180. [PMID: 31888010 PMCID: PMC6981690 DOI: 10.3390/ijms21010180] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 12/20/2019] [Accepted: 12/20/2019] [Indexed: 02/07/2023] Open
Abstract
Brassica campestris L., a hyperaccumulator of cadmium (Cd), is considered a candidate plant for efficient phytoremediation. The hairy roots of Brassica campestris L are chosen here as a model plant system to investigate the response mechanism of Brassica campestris L. to Cd stress. High-throughput sequencing technology is used to identify genes related to Cd tolerance. A total of 2394 differentially expressed genes (DEGs) are identified by RNA-Seq analysis, among which 1564 genes are up-regulated, and 830 genes are down-regulated. Data from the gene ontology (GO) analysis indicate that DEGs are mainly involved in metabolic processes. Glutathione metabolism, in which glutathione synthetase and glutathione S-transferase are closely related to Cd stress, is identified in the Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis. A Western blot shows that glutathione synthetase and glutathione S-transferase are involved in Cd tolerance. These results provide a preliminary understanding of the Cd tolerance mechanism of Brassica campestris L. and are, hence, of particular importance to the future development of an efficient phytoremediation process based on hairy root cultures, genetic modification, and the subsequent regeneration of the whole plant.
Collapse
Affiliation(s)
| | | | | | | | - Xiyu Cheng
- Correspondence: (X.C.); (Q.Y.); Tel.: +86-138-1027-4418 (X.C.); +86-138-1093-8871 (Q.Y.)
| | - Qiong Yan
- Correspondence: (X.C.); (Q.Y.); Tel.: +86-138-1027-4418 (X.C.); +86-138-1093-8871 (Q.Y.)
| |
Collapse
|
15
|
Song J, Finnegan PM, Liu W, Li X, Yong JWH, Xu J, Zhang Q, Wen Y, Qin K, Guo J, Li T, Zhao C, Zhang Y. Mechanisms underlying enhanced Cd translocation and tolerance in roots of Populus euramericana in response to nitrogen fertilization. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 287:110206. [PMID: 31481203 DOI: 10.1016/j.plantsci.2019.110206] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/18/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
A pot experiment was conducted to evaluate how nitrogen (N) availability influences cadmium (Cd) absorption, translocation and stress tolerance in roots of Populus euramericana. Seedling growth was sensitive to N deficiency, but it was unaltered by Cd exposure. Cadmium absorption by roots was promoted by N deficiency, resulting in a higher root Cd concentration compared to the N-sufficient condition. Fine-root length was tightly correlated (R2 = 0.73) with Cd concentration in roots, indicating that vigorous fine-root proliferation under N deficiency contributed to active absorption and accumulation of Cd in roots. Despite accumulation in roots, Cd translocation from roots to shoots was less active under N deficiency compared to N sufficiency. This was related to elevated glutathione reductase (GR) activity and glutathione (GSH) levels in roots after N application, which may not only promote antioxidant defence, but also facilitate the formation of GSH-Cd complexes that are uploaded into root cylinders. Nitrogen application also promoted antioxidant defense in roots via increased production of phytohormones and the level of enzymatic and non-enzymatic antioxidants. Transcript levels for genes responsible for antioxidant defense, Cd detoxification and Cd uploading were increased in roots by N application. The N-stimulated Cd tolerance, detoxification and uploading in roots are factors likely to promote Cd translocation from roots to shoots, which may enhance the biological capacity of this poplar species for phytoremediation of Cd pollution.
Collapse
Affiliation(s)
- Junyu Song
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Patrick M Finnegan
- School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.
| | - Wenhui Liu
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Xiang Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Jean W H Yong
- Department of Biosystems and Technology, Swedish University of Agricultural Science, Alanrp, Sweden.
| | - Jiuting Xu
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Qi Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Yuxin Wen
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Kexin Qin
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Jinze Guo
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Ting Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Chang Zhao
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Yi Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| |
Collapse
|
16
|
Xu S, Li B, Li P, He X, Chen W, Yan K, Li Y, Wang Y. Soil high Cd exacerbates the adverse impact of elevated O 3 on Populus alba 'Berolinensis' L. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:35-42. [PMID: 30818258 DOI: 10.1016/j.ecoenv.2019.02.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/13/2019] [Accepted: 02/16/2019] [Indexed: 06/09/2023]
Abstract
Pollution with both heavy metal and ground-level ozone (O3) has been steadily increasing, especially in the cities with heavy industry. Little information is known about their combined impacts on urban tree. This study was aimed at characterizing the interactive effects of soil cadmium (Cd) addition and O3 fumigation on visible injury and growth, photosynthesis, oxidative stress, antioxidant enzyme activities, abscisic acid (ABA) content and bioaccumulation of Cd in one-year-old Populus alba 'Berolinensis' saplings by using open top chambers in Shenyang city with developed heavy industry, Northeast China. In this study, poplar saplings were grown in the pots containing soil with different concentrations of Cd (0, 100 and 500 mg kg-1) under ambient air (40 µg L-1) and elevated O3 (120 µg L-1). The results showed that EO and its combination with high Cd (500 mg kg-1) induced significant foliar injury symptoms, decreased root weight (by 41.6%) and total biomass (by 17.4%), inhibited net photosynthetic rate and stomatal conductance, and increased malondialdehyde and ABA contents after 4 weeks of O3 exposure. Elevated O3 exacerbated the accumulation of Cd in leaves and stems of poplar plants grown in the pots with high Cd-polluted soil. Our results also indicated that high Cd pollution in soil increased the susceptibility of plants to O3 and exacerbated the adverse impact of elevated O3 on physiological metabolisms of poplar species, which implied that it was very necessary to take into consideration for O3-tolerance of tree species during phytoremediation of Cd-polluted soil in heavy industrial areas.
Collapse
Affiliation(s)
- Sheng Xu
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China
| | - Bo Li
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China
| | - Pin Li
- Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Xingyuan He
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China.
| | - Wei Chen
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China
| | - Kun Yan
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China
| | - Yan Li
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China
| | - Yijing Wang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China
| |
Collapse
|
17
|
Asgari Lajayer B, Khadem Moghadam N, Maghsoodi MR, Ghorbanpour M, Kariman K. Phytoextraction of heavy metals from contaminated soil, water and atmosphere using ornamental plants: mechanisms and efficiency improvement strategies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:8468-8484. [PMID: 30712209 DOI: 10.1007/s11356-019-04241-y] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 01/14/2019] [Indexed: 05/22/2023]
Abstract
Accumulation of heavy metals (HMs) in soil, water and air is one of the major environmental concerns worldwide, which mainly occurs due to anthropogenic activities such as industrialization, urbanization, and mining. Conventional remediation strategies involving physical or chemical techniques are not cost-effective and/or eco-friendly, reinforcing the necessity for development of novel approaches. Phytoextraction has attracted considerable attention over the past decades and generally refers to use of plants for cleaning up environmental pollutants such as HMs. Compared to other plant types such as edible crops and medicinal plants, ornamental plants (OPs) seem to be a more viable option as they offer several advantages including cleaning up the HMs pollution, beautification of the environment, by-product generation and related economic benefits, and not generally being involved in the food/feed chain or other direct human applications. Phytoextraction ability of OPs involve diverse detoxification pathways such as enzymatic and non-enzymatic (secondary metabolites) antioxidative responses, distribution and deposition of HMs in the cell walls, vacuoles and metabolically inactive tissues, and chelation of HMs by a ligand such as phytochelatins followed by the sequestration of the metal-ligand complex into the vacuoles. The phytoextraction efficiency of OPs can be improved through chemical, microbial, soil amending, and genetic approaches, which primarily target bioavailability, uptake, and sequestration of HMs. In this review, we explore the phytoextraction potential of OPs for remediation of HMs-polluted environments, underpinning mechanisms, efficiency improvement strategies, and highlight the potential future research directions.
Collapse
Affiliation(s)
- Behnam Asgari Lajayer
- Department of Soil Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Nader Khadem Moghadam
- Department of Soil Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
| | | | - Mansour Ghorbanpour
- Department of Medicinal Plants, Faculty of Agriculture and Natural Resources, Arak University, Arak, 38156-8-8349, Iran.
| | - Khalil Kariman
- School of Agriculture and Environment M087, The University of Western Australia, Crawley, WA, 6009, Australia
| |
Collapse
|
18
|
Role of Phytoremediation in Reducing Cadmium Toxicity in Soil and Water. J Toxicol 2018; 2018:4864365. [PMID: 30425738 PMCID: PMC6218723 DOI: 10.1155/2018/4864365] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 09/24/2018] [Indexed: 12/05/2022] Open
Abstract
Heavy metals are a noxious form of pollutants present in soil and water. A new plant-based solar energy driven technology, phytoremediation, emerges as eco-friendly and cost-effective approach to remove heavy metal from various media with the help of hyperaccumulating plant species. This review paper aims to provide information on phytoremediation and its mechanisms for heavy metal removal especially to focus on Cadmium (Cd) metal and highlights the role of various hyperaccumulating plants for Cd metal remediation in soil and water. It complies various field case studies which play the important role in understanding the Cd removal through various plants. Additionally, it pinpoints several sources and the effects of Cd and other technologies used for Cd remediation. This paper provides the recent development in mechanisms of Cd hyperaccumulation by different plants, in order to motivate further research in this field.
Collapse
|
19
|
Zhu H, Ai H, Cao L, Sui R, Ye H, Du D, Sun J, Yao J, Chen K, Chen L. Transcriptome analysis providing novel insights for Cd-resistant tall fescue responses to Cd stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 160:349-356. [PMID: 29860131 DOI: 10.1016/j.ecoenv.2018.05.066] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 04/26/2018] [Accepted: 05/24/2018] [Indexed: 05/17/2023]
Abstract
Cadmium (Cd) is a severely toxic heavy metal and environmental pollutant. Tall fescue is a cold season turf grass which has high resistance to Cd as well as the ability to enrich it. To investigate the molecular mechanism underlying the adaptability of tall fescue to Cd stress, RNA-Seq was used to examine Cd stress responses of tall fescue at a transcriptional level. A total of 12 cDNA libraries were constructed from the total RNA of roots or leaves of tall fescue with or without Cd treatments. A total of 2594 (1768 up- and 826 down-regulated) differentially expressed genes (DEGs) were detected in the roots of Cd-stressed tall fescue compared with control roots (R_cd vs R_ck), while only 52 (29 up- and 23 down-regulated) DEGs were found in the leaves of Cd-stressed plants versus the controls (L_cd vs L_ck). The genes encoding glutathione S-transferase (GST), transporter proteins including the ABC transporter, ZRT/IRT-like protein, potassium transporter/channel, nitrate transporter, putative iron-phytosiderophore transporter, copper-transporting ATPase or transporter and multidrug and toxic compound extrusion (MATE) proteins, and numerous transcription factors were found to be significantly induced in Cd-treated roots. In addition, pathogenesis/disease-related gene mRNAs were accumulated in Cd-treated roots of tall fescue. Furthermore, the significantly enriched KEGG pathways in roots were related to 'Glutathione metabolism', 'Ribosome', 'alpha-Linolenic acid metabolism', 'Diterpenoid biosynthesis', 'Sulfur metabolism', 'Phenylpropanoid biosynthesis', 'Protein processing in endoplasmic reticulum', 'Protein export' and 'Nitrogen metabolism'. The study provides novel insights for further understanding the molecular mechanisms of tall fescue responses to Cd stress.
Collapse
Affiliation(s)
- Huihui Zhu
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China; Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Honglian Ai
- College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, China
| | - Liwen Cao
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Ran Sui
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Hengpeng Ye
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Dongyun Du
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Jie Sun
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Jun Yao
- China University of Geosciences Beijing, School of Water Resources & Environment, Beijing 100083, China
| | - Ke Chen
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China.
| | - Liang Chen
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
| |
Collapse
|
20
|
Gu C, Liu L, Song A, Liu Z, Zhang Y, Huang S. Iris lactea var. chinensis (Fisch.) cysteine-rich gene llCDT1 enhances cadmium tolerance in yeast cells and Arabidopsis thaliana. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 157:67-72. [PMID: 29605645 DOI: 10.1016/j.ecoenv.2018.03.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/15/2018] [Accepted: 03/23/2018] [Indexed: 06/08/2023]
Abstract
UNLABELLED IlCDT1, a cysteine-rich protein, was isolated from Iris lactea var. chinensis (Fisch.) (I. lactea var. chinensis). Its transcription was up-regulated by the exogenous application of Cd. The truncated IlCDT1 (25-54) containing 14 Cys residues confers Cd tolerance to yeast as the intact IlCDT1, indicating that Cys residues are required for Cd tolerance presumably by chelating Cd. When the gene was constitutively expressed in A. thaliana, root length of transgenic lines was longer than that of wild-type under 100 μM or 200 μM Cd stress. However, Cd absorption in wild-type was more than in two trangenic lines under 100 μM Cd exposure. IlCDT1 may directly bind Cd, through chelating Cd and avoiding the Cd uptake into the cells. Together, IlCDT1 may be a promising gene for the Cd tolerance improvement. SUMMARY Cysteine-rich gene llCDT1 enhances cadmium tolerance in yeast cells and Arabidopsis thaliana.
Collapse
Affiliation(s)
- Chunsun Gu
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Liangqin Liu
- College of Horticulture, Nanjing Agricultural University, Nanjing 210014, China
| | - Aiping Song
- College of Horticulture, Nanjing Agricultural University, Nanjing 210014, China
| | - Zhaolei Liu
- College of Horticulture, Nanjing Agricultural University, Nanjing 210014, China
| | - Yongxia Zhang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Suzhen Huang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| |
Collapse
|
21
|
Chen L, Wan H, Qian J, Guo J, Sun C, Wen J, Yi B, Ma C, Tu J, Song L, Fu T, Shen J. Genome-Wide Association Study of Cadmium Accumulation at the Seedling Stage in Rapeseed ( Brassica napus L.). FRONTIERS IN PLANT SCIENCE 2018; 9:375. [PMID: 29725340 PMCID: PMC5917214 DOI: 10.3389/fpls.2018.00375] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 03/06/2018] [Indexed: 05/26/2023]
Abstract
Cadmium is a potentially toxic heavy metal to human health. Rapeseed (Brassica napus L.), a vegetable and oilseed crop, might also be a Cd hyperaccumulator, but there is little information on this trait in rapeseed. We evaluated Cd accumulation in different oilseed accessions and employed a genome-wide association study to identify quantitative trait loci (QTLs) related to Cd accumulation. A total of 419 B. napus accessions and inbred lines were genotyped with a 60K Illumina Infinium SNP array of Brassica. Wide genotypic variations in Cd concentration and translocation were found. Twenty-five QTLs integrated with 98 single-nucleotide polymorphisms (SNPs) located at 15 chromosomes were associated with Cd accumulation traits. These QTLs explained 3.49-7.57% of the phenotypic variation observed. Thirty-two candidate genes were identified in these genomic regions, and they were 0.33-497.97 kb away from the SNPs. We found orthologs of Arabidopsis thaliana located near the significant SNPs on the B. napus genome, including NRAMP6 (natural resistance-associated macrophage protein 6), IRT1 (iron-regulated transporter 1), CAD1 (cadmium-sensitive 1), and PCS2 (phytochelatin synthase 2). Of them, four candidate genes were verified by qRT-PCR, the expression levels of which were significantly higher after exposure to Cd than in the controls. Our results might facilitate the study of the genetic basis of Cd accumulation and the cloning of candidate Cd accumulation genes, which could be used to help reduce Cd levels in edible plant parts and/or create more efficient hyperaccumulators.
Collapse
Affiliation(s)
- Lunlin Chen
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
- Nanchang Branch of National Center of Oilcrops Improvement, Jiangxi Province Key Laboratory of Oil Crops Biology, Crops Research Institute of Jiangxi Academy of Agricultural Sciences, Nanchang, China
| | - Heping Wan
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jiali Qian
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jianbin Guo
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Chengming Sun
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jing Wen
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Bin Yi
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Chaozhi Ma
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jinxing Tu
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Laiqiang Song
- Nanchang Branch of National Center of Oilcrops Improvement, Jiangxi Province Key Laboratory of Oil Crops Biology, Crops Research Institute of Jiangxi Academy of Agricultural Sciences, Nanchang, China
| | - Tingdong Fu
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jinxiong Shen
- National Key Laboratory of Crop Genetic Improvement, National Engineering Research Center for Rapeseed, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| |
Collapse
|
22
|
Bian F, Zhong Z, Wu S, Zhang X, Yang C, Xiong X. Comparison of heavy metal phytoremediation in monoculture and intercropping systems of Phyllostachys praecox and Sedum plumbizincicola in polluted soil. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:490-498. [PMID: 28949764 DOI: 10.1080/15226514.2017.1374339] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A bamboo species (Phyllostachys praecox) and a Cd/Zn hyperaccumulator (Sedum plumbizincicola) were tested under different planting systems to compare their heavy metal phytoremediation ability. P. praecox (MP), S. plumbizincicola (MS) and P. praecox × S. plumbizincicola (IPS) plantations were established in Cu, Zn, and Cd-contaminated soil. Soil properties and heavy metal contents in plants were determined and compared after four years of plantation establishment. The rankings of available and total metal contents in soil layers were MP > MS > IPS (0-20 cm) and MP > IPS > MS (20-40 cm, except for Cu), respectively. The Cu and Zn contents in mature bamboo tissues were significantly lower, but the Cd contents in bamboo tissues (except for leaves) higher, in the IPS than in the MP. The bioconcentration and the translocation factors in most of bamboo tissues showed an increasing trend from the MP to the IPS. Heavy metal distribution in plants is greatly affected by the planting patterns. The tested intercropping system of two plant species showed higher biomass productivity, implying more heavy metals can be removed from the soil through the harvesting of plants. Therefore, the IPS leads to significant improvement of soil phytoremediation.
Collapse
Affiliation(s)
- Fangyuan Bian
- a Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province , Hangzhou , P. R. China
| | - Zheke Zhong
- a Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province , Hangzhou , P. R. China
| | - Shengchun Wu
- b School of Environment and Resources Sciences, Zhejiang A&F University , Hangzhou , P. R. China
| | - Xiaoping Zhang
- a Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province , Hangzhou , P. R. China
| | - Chuanbao Yang
- a Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province , Hangzhou , P. R. China
| | - Xiaoyi Xiong
- a Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province , Hangzhou , P. R. China
| |
Collapse
|
23
|
Gu CS, Liu LQ, Deng YM, Zhang YX, Wang ZQ, Yuan HY, Huang SZ. De novo characterization of the Iris lactea var. chinensis transcriptome and an analysis of genes under cadmium or lead exposure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 144:507-513. [PMID: 28675864 DOI: 10.1016/j.ecoenv.2017.06.071] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/20/2017] [Accepted: 06/29/2017] [Indexed: 06/07/2023]
Abstract
Iris lactea var. chinensis (I. lactea var. chinensis) is tolerant to accumulations of cadmium (Cd) and lead (Pb). In this study, the transcriptome of I. lactea var. chinensis was investigated under Cd or Pb stresses. Using the gene ontology database, 31,974 unigenes were classified into biological process, cellular component and molecular function. In total, 13,132 unigenes were involved in enriched Encyclopedia of Genes and Genomes (KEGG) metabolic pathways, and the expression levels of 5904 unigenes were significantly changed after exposure to Cd or Pb stresses. Of these, 974 were co-up-regulated and 1281 were co-down-regulated under the two stresses. The transcriptome expression profiles of I. lactea var. chinensis under Cd or Pb stresses obtained in this study provided a resource for identifying common mechanisms in the detoxification of different heavy metals. Furthermore, the identified unigenes may be used for the genetic breeding of heavy-metal tolerant plants.
Collapse
Affiliation(s)
- Chun-Sun Gu
- The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Liang-Qin Liu
- The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Yan-Ming Deng
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yong-Xia Zhang
- The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Zhi-Quan Wang
- The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Hai-Yan Yuan
- The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Su-Zhen Huang
- The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| |
Collapse
|
24
|
Poblaciones MJ, Damon P, Rengel Z. Foliar zinc biofortification effects in Lolium rigidum and Trifolium subterraneum grown in cadmium-contaminated soil. PLoS One 2017; 12:e0185395. [PMID: 28950025 PMCID: PMC5614633 DOI: 10.1371/journal.pone.0185395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 09/12/2017] [Indexed: 11/24/2022] Open
Abstract
Zinc (Zn) is an important micronutrient that can alleviate cadmium (Cd) toxicity to plants and limit Cd entry into the food chain. However, little is known about the Zn-Cd interactions in pasture plants. We characterized the effects of foliar Zn application and Cd uptake by ryegrass (Lolium rigidum L.) and clover (Trifolium subterraneum L.) grown on Cd-contaminated soils; all combinations of foliar Zn applications (0, 0.25 and 0.5% (w/v) ZnSO4·7H2O) and soil Cd concentrations (0, 2.5 and 5 mg Cd kg-1) were tested. For both plant species, soil concentrations of DTPA-extractable Cd and Zn increased with an increase in the Cd and Zn treatments, respectively. Compared with L. rigidum, T. subterraneum accumulated, respectively, 3.3- and 4.1-fold more Cd in the 2.5-Cd and 5-Cd treatments and about 1.3-, 2.3- and 2.8-fold more Zn in the No-Zn, 0.25-Zn and 0.5-Zn treatments. Also, DTPA-Zn concentration was higher in soil after T. subterraneum than L. rigidum growth regardless of Zn applications. Foliar application of 0.25% (w/v) Zn significantly decreased the total Cd concentration in shoots of both species grown in the Cd-contaminated soil and ameliorated the adverse effects of Cd exposure on root growth, particularly in T. subterraneum.
Collapse
Affiliation(s)
- Maria J. Poblaciones
- Department of Agronomy and Forest Environment Engineering, University of Extremadura, Badajoz, Spain
- School of Agriculture and Environment, The University of Western Australia, Perth, Australia
| | - Paul Damon
- School of Agriculture and Environment, The University of Western Australia, Perth, Australia
| | - Zed Rengel
- School of Agriculture and Environment, The University of Western Australia, Perth, Australia
| |
Collapse
|
25
|
Guo Q, Meng L, Zhang YN, Mao PC, Tian XX, Li SS, Zhang L. Antioxidative systems, metal ion homeostasis and cadmium distribution in Iris lactea exposed to cadmium stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 139:50-55. [PMID: 28110045 DOI: 10.1016/j.ecoenv.2016.12.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 12/08/2016] [Accepted: 12/08/2016] [Indexed: 06/06/2023]
Abstract
Iris lactea is a perennial halophyte and is tolerant to Cd. However, the mechanisms underlying this Cd tolerance are still poorly understood. In this study, morphological, physiological and biochemical responses of I. lactea to a 21 d exposure to different concentrations of Cd (0-150mgL-1) were investigated. I. lactea plants showed no toxicity symptoms except for a small reduction in growth at 100 and 150mgL-1 Cd, along with the enhancement of H2O2 and MDA content in comparison to the control. The activities of SOD and POD were significantly enhanced and Ca accumulated with increasing Cd concentrations. Moreover, most Cd was retained in roots and only a small amount was transported to the shoots with increasing external Cd concentrations. Cd content had a negative correlation with content of K, Fe, Zn, and Mn and a positive correlation with Mg content in shoots and roots, which had no influence on these contents of mineral nutrients in shoots and chlorophyll levels with the increase of Cd concentrations. The Cd translocation factors were always less than 1 and bioaccumulation factors ranged from 3.43 to 15.6 across all treatments, suggesting that I. lactea might be effectively used in phytostabilization of Cd contaminated soils. Overall, the findings suggest that I. lactea could reduce photoinhibition and oxidative damage and maintain metal ion homeostasis in plant tissue by limiting translocation of Cd from roots to shoots and enhancing induction of antioxidant enzyme activities, thereby improving its Cd tolerance.
Collapse
Affiliation(s)
- Qiang Guo
- Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, PR China
| | - Lin Meng
- Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, PR China.
| | - Ya-Nan Zhang
- Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, PR China
| | - Pei-Chun Mao
- Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, PR China
| | - Xiao-Xia Tian
- Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, PR China
| | - Shan-Shan Li
- Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, PR China
| | - Lin Zhang
- Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, PR China
| |
Collapse
|
26
|
Manquián-Cerda K, Escudey M, Zúñiga G, Arancibia-Miranda N, Molina M, Cruces E. Effect of cadmium on phenolic compounds, antioxidant enzyme activity and oxidative stress in blueberry (Vaccinium corymbosum L.) plantlets grown in vitro. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 133:316-26. [PMID: 27485373 DOI: 10.1016/j.ecoenv.2016.07.029] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 07/19/2016] [Accepted: 07/20/2016] [Indexed: 05/05/2023]
Abstract
Cadmium (Cd(2+)) can affect plant growth due to its mobility and toxicity. We evaluated the effects of Cd(2+) on the production of phenolic compounds and antioxidant response of Vaccinium corymbosum L. Plantlets were exposed to Cd(2+) at 50 and 100µM for 7, 14 and 21 days. Accumulation of malondialdehyde (MDA), hydrogen peroxide (H2O2) and the antioxidant enzyme SOD was determined. The profile of phenolic compounds was evaluated using LC-MS. The antioxidant activity was measured using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and the ferric reducing antioxidant power test (FRAP). Cd(2+) increased the content of MDA, with the highest increase at 14 days. The presence of Cd(2+) resulted in changes in phenolic compounds. The main phenolic compound found in blueberry plantlets was chlorogenic acid, whose abundance increased with the addition of Cd(2+) to the medium. The changes in the composition of phenolic compounds showed a positive correlation with the antioxidant activity measured using FRAP. Our results suggest that blueberry plantlets produced phenolic compounds with reducing capacity as a selective mechanism triggered by the highest activity of Cd(2+).
Collapse
Affiliation(s)
- K Manquián-Cerda
- Facultad de Química y Biología, Universidad de Santiago de Chile, Avenue B. O'Higgins, 3363 Santiago, Chile.
| | - M Escudey
- Facultad de Química y Biología, Universidad de Santiago de Chile, Avenue B. O'Higgins, 3363 Santiago, Chile; Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124 Santiago, Chile
| | - G Zúñiga
- Facultad de Química y Biología, Universidad de Santiago de Chile, Avenue B. O'Higgins, 3363 Santiago, Chile
| | - N Arancibia-Miranda
- Facultad de Química y Biología, Universidad de Santiago de Chile, Avenue B. O'Higgins, 3363 Santiago, Chile; Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124 Santiago, Chile
| | - M Molina
- Universidad Técnica Federico Santa María, Avenue Santa María #6.400, Vitacura, Santiago 7660251, Chile
| | - E Cruces
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124 Santiago, Chile
| |
Collapse
|
27
|
Han Y, Wu X, Gu J, Zhao J, Huang S, Yuan H, Fu J. Effects of organic acids on the photosynthetic and antioxidant properties and accumulations of heavy metals of Melilotus officinalis grown in Cu tailing. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:17901-9. [PMID: 27255310 DOI: 10.1007/s11356-016-6920-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 05/18/2016] [Indexed: 05/25/2023]
Abstract
The effect of citric acid (CA), acetic acid (Ac), and ethylene diamine tetraacetic acid (EDTA) on the photosynthetic and antioxidant properties and the accumulation of some heavy metals (HMs) of Melilotus officinalis seedling growing in Cu mine tailings for 25 days were studied. Results showed that the formation of photosynthesizing cells of M. officinalis was inhibited by EDTA at 2 mmol/kg. Photosynthetic pigment contents under EDTA of 2 mmol/kg were reduced by 26, 40, and 19 %, respectively, compared to the control. The proline contents in aboveground and underground parts increased as the level of EDTA was enhanced. CA and Ac enhanced the activities of superoxide dismutase (SOD) and peroxidase (POD) in the aboveground parts and EDTA inhibited the activity of POD in the underground parts. The addition of CA promoted significantly the growth of M. officinalis, while the biomass decreased significantly under 2 mmol/kg EDTA. Cu contents in the aboveground parts treated with 0.5 and 2.0 mmol/kg EDTA reached 175.50 and 265.17 μg/g dry weight, respectively. Ac and EDTA treatments promoted Cd to translocate from root to aboveground parts. The result indicated that M. officinalis was a tolerant species of Cu tailing and can be used to remediate Cu contaminated environment, and rationally utilization of organic acids, especially EDTA, in the phytoremediation can improve the growth and metals accumulation of M. officinalis.
Collapse
Affiliation(s)
- Yulin Han
- Experimental Teaching Center of Ecological Environment of Jiangxi Province, Department of Landscape Architecture, Jiangxi University of Finance and Economics, Nanchang, 330032, China.
- Nanchang Institute of Science and Technology, Nanchang, 330108, China.
| | - Xue Wu
- Experimental Teaching Center of Ecological Environment of Jiangxi Province, Department of Landscape Architecture, Jiangxi University of Finance and Economics, Nanchang, 330032, China
| | - Jiguang Gu
- College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Jiuzhou Zhao
- Experimental Teaching Center of Ecological Environment of Jiangxi Province, Department of Landscape Architecture, Jiangxi University of Finance and Economics, Nanchang, 330032, China
| | - Suzhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing Sun Yat-Sen Botanical Garden, Nanjing, 210014, China
| | - Haiyan Yuan
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing Sun Yat-Sen Botanical Garden, Nanjing, 210014, China
| | - Jiajia Fu
- Nanchang Institute of Science and Technology, Nanchang, 330108, China
| |
Collapse
|
28
|
Han Y, Zhang L, Yang Y, Yuan H, Zhao J, Gu J, Huang S. Pb uptake and toxicity to Iris halophila tested on Pb mine tailing materials. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 214:510-516. [PMID: 27131809 DOI: 10.1016/j.envpol.2016.04.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 04/08/2016] [Accepted: 04/14/2016] [Indexed: 06/05/2023]
Abstract
Pb tolerant mechanisms, plant physiological response and Pb sub-cellular localization in the root cells of Iris halophila were studied in sand culture and the Pb mine tailings. Results showed that the activities of superoxide dismutase (SOD) and peroxidase (POD) in the underground parts and the activity of catalase (CAT) in the aboveground and underground parts increased as Pb level was enhanced. Glutathione (GSH) and ascorbic acid (AsA) contents increased by Pb treatments. Pb deposits were found in the middle cell walls or along the inner side of epibiotic protoplasm of some cells which accumulated a large quantity of Pb and died. The dry weights (DWs) of aboveground parts under all Pb tailings treatments decreased insignificantly, while the DW of the underground parts growing in the pure Pb tailings decreased significantly. Pb, Cu, Cd, and Zn contents increased significantly as the levels of Pb tailings were enhanced and Pb contents in the aboveground and underground parts reached 64.75 and 751.75 μg/g DW, respectively, at pure Pb tailings treatment. The results indicated that I. halophila is a promising plant in the phytoremediation of Pb contaminated environment. Some antioxidant enzymes, antioxidants and compartmentalization of Pb were played major roles in Pb tolerance of I. halophila.
Collapse
Affiliation(s)
- Yulin Han
- Experimental Teaching Center of Ecological Environment of Jiangxi Province, Department of Landscape Architecture, Jiangxi University of Finance and Economics, Nanchang, 330032, China
| | - Lili Zhang
- Experimental Teaching Center of Ecological Environment of Jiangxi Province, Department of Landscape Architecture, Jiangxi University of Finance and Economics, Nanchang, 330032, China
| | - Yongheng Yang
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing Sun Yat-Sen Botanical Garden, Nanjing, 210014, China
| | - Haiyan Yuan
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing Sun Yat-Sen Botanical Garden, Nanjing, 210014, China
| | - Jiuzhou Zhao
- Experimental Teaching Center of Ecological Environment of Jiangxi Province, Department of Landscape Architecture, Jiangxi University of Finance and Economics, Nanchang, 330032, China
| | - Jiguang Gu
- College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Suzhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing Sun Yat-Sen Botanical Garden, Nanjing, 210014, China.
| |
Collapse
|
29
|
Wężowicz K, Turnau K, Anielska T, Zhebrak I, Gołuszka K, Błaszkowski J, Rozpądek P. Metal toxicity differently affects the Iris pseudacorus-arbuscular mycorrhiza fungi symbiosis in terrestrial and semi-aquatic habitats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:19400-7. [PMID: 26585452 PMCID: PMC4679110 DOI: 10.1007/s11356-015-5706-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 10/27/2015] [Indexed: 05/13/2023]
Abstract
Phytoremediation offers an environmental friendly alternative to conventional cleanup techniques. In this study, mycorrhizal fungi isolated from the roots of Mentha longifolia grown in the basin of the Centuria River (S Poland) were used. Iris pseudacorus was grown in substratum from an industrial waste, enriched in Pb, Fe, Zn, and Cd in a terrestrial and water-logged habitat. Plant yield and photosynthetic performance was the highest in the aquatic environment; however, the presence of toxic metals (TM) negatively affected photosystem II (PSII) photochemistry as shown by the JIP test. Fungi colonization and Cd accumulation within plant tissues was decreased. In the terrestrial habitat, neither arbuscular mycorrhizal fungi (AMF) nor metal toxicity affected plant growth, although metal uptake, Cd in particular, as well as photosynthesis were affected. Inoculated plants accumulated significantly more Cd, and photosynthesis was downregulated. The results presented in this study clearly indicate that the I. pseudacorus-AMF symbiosis adapts itself to the presence of toxic metals in the environment, optimizing resource supply, energy fluxes, and possibly stress tolerance mechanisms. Plant/AMF consortia grown in terrestrial and water-logged habitats utilize different strategies to cope with metal toxicity. The use of AMF in improving the phytoremediation potential of I. pseudacorus needs, however, further research.
Collapse
Affiliation(s)
- K Wężowicz
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
| | - K Turnau
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
- Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7A, Kraków, 30-387, Poland
| | - T Anielska
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
| | - I Zhebrak
- Department of Botany, Yanka Kupala State University, Grodno, Belarus
| | - K Gołuszka
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
| | - J Błaszkowski
- Department of Plant Protection, West Pomeranian University of Technology, Słowackiego 17, Szczecin, 71-434, Poland
| | - P Rozpądek
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland.
- Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Kraków, 30-239, Poland.
| |
Collapse
|
30
|
Han Y, Chen G, Chen Y, Shen Z. Cadmium Toxicity and Alleviating Effects of Exogenous Salicylic Acid in Iris hexagona. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 95:796-802. [PMID: 26310127 DOI: 10.1007/s00128-015-1640-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 08/18/2015] [Indexed: 06/04/2023]
Abstract
Cadmium (Cd) toxictity and possible role of salicylic acid (SA) in alleviating Cd-induced toxicity were investigated on ornamental hydrophyte Iris hexagona. Compared to the control, treatments with 100 and 500 µM Cd for 7 days significantly decreased dry weight, the contents of chlorophyll, photosynthetic parameters, and increased the content of thiobarbituric acid reactive substance. Pretreatment of the roots of I. hexagona seedlings with 1 µM SA before Cd exposure may increase dry weight, photosynthetic rate, activities of antioxidant enzymes, improve the cell ultrastructure and protect plants from Cd-induced oxidative stress damage. However, SA pretreatment had no significant effect on Cd concentrations in the leaves and roots. It is suggested that SA-induced Cd tolerances in I. hexagona are likely associated with increases in antioxidant enzyme activities and vacuolar compartmentation, rather than Cd uptake.
Collapse
Affiliation(s)
- Ying Han
- National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, College of Life Sciences, Nanjing Agriculture University, Nanjing, 210095, China
- Suzhou Polytechnic Institute of Agriculture, Suzhou, 215008, China
| | - Gang Chen
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, 225009, China
| | - Yahua Chen
- National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, College of Life Sciences, Nanjing Agriculture University, Nanjing, 210095, China
| | - Zhenguo Shen
- National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, College of Life Sciences, Nanjing Agriculture University, Nanjing, 210095, China.
| |
Collapse
|
31
|
Gao W, Nan T, Tan G, Zhao H, Tan W, Meng F, Li Z, Li QX, Wang B. Cellular and Subcellular Immunohistochemical Localization and Quantification of Cadmium Ions in Wheat (Triticum aestivum). PLoS One 2015; 10:e0123779. [PMID: 25941807 PMCID: PMC4420502 DOI: 10.1371/journal.pone.0123779] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 02/28/2015] [Indexed: 11/19/2022] Open
Abstract
The distribution of metallic ions in plant tissues is associated with their toxicity and is important for understanding mechanisms of toxicity tolerance. A quantitative histochemical method can help advance knowledge of cellular and subcellular localization and distribution of heavy metals in plant tissues. An immunohistochemical (IHC) imaging method for cadmium ions (Cd2+) was developed for the first time for the wheat Triticum aestivum grown in Cd2+-fortified soils. Also, 1-(4-Isothiocyanobenzyl)-ethylenediamine-N,N,N,N-tetraacetic acid (ITCB-EDTA) was used to chelate the mobile Cd2+. The ITCB-EDTA/Cd2+ complex was fixed with proteins in situ via the isothiocyano group. A new Cd2+-EDTA specific monoclonal antibody, 4F3B6D9A1, was used to locate the Cd2+-EDTA protein complex. After staining, the fluorescence intensities of sections of Cd2+-positive roots were compared with those of Cd2+-negative roots under a laser confocal scanning microscope, and the location of colloidal gold particles was determined with a transmission electron microscope. The results enable quantification of the Cd2+ content in plant tissues and illustrate Cd2+ translocation and cellular and subcellular responses of T. aestivum to Cd2+ stress. Compared to the conventional metal-S coprecipitation histochemical method, this new IHC method is quantitative, more specific and has less background interference. The subcellular location of Cd2+ was also confirmed with energy-dispersive X-ray microanalysis. The IHC method is suitable for locating and quantifying Cd2+ in plant tissues and can be extended to other heavy metallic ions.
Collapse
Affiliation(s)
- Wei Gao
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou, China
| | - Tiegui Nan
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Guiyu Tan
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Hongwei Zhao
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
| | - Weiming Tan
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Fanyun Meng
- Institute of Natural Medicine and Chinese Medicine Resources, Beijing Normal University, Beijing, China
| | - Zhaohu Li
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Qing X. Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
- * E-mail: (BW); (QXL)
| | - Baomin Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- * E-mail: (BW); (QXL)
| |
Collapse
|
32
|
Liu Z, Chen W, He X, Jia L, Yu S, Zhao M. Hormetic Responses of Lonicera Japonica Thunb. To Cadmium Stress. Dose Response 2015; 13:10.2203_dose-response.14-033.He. [PMID: 26672952 PMCID: PMC4674179 DOI: 10.2203/dose-response.14-033.he] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
The hormetic responses of Lonicera japonica Thunb. to cadmium (Cd) stress were investigated in a hydroponic experiment. The present results showed that root length and total biomass dry weight increased in comparison with the control at low concentrations Cd. The height of the plant exposed to 2.5 and 5 mg L-1 Cd increased significantly by 11.9% and 12.8% relative to the control, and with the increase of Cd concentrations in the medium, plant height began to decrease. The responses of photosynthetic pigments contents and relative water content to Cd stress had a similar trend, which all showed significantly an inverted U-shaped dose–response curve and confirmed that the stimulatory effect of low concentrations Cd occurred in the plant. Furthermore, L. japonica, as a new Cd-hyperaccumulator, could be considered as a new plant model to study the underlying mechanisms of the hormesis.
Collapse
Affiliation(s)
- Zhouli Liu
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, PR China
| | - Wei Chen
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, PR China
| | - Xingyuan He
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, PR China
| | - Lian Jia
- Graduate University of Chinese Academy of Sciences, Jia 19 Yuquan Road, Beijing 100039, People's Republic of China
| | - Shuai Yu
- Graduate University of Chinese Academy of Sciences, Jia 19 Yuquan Road, Beijing 100039, People's Republic of China
| | - Mingzhu Zhao
- Graduate University of Chinese Academy of Sciences, Jia 19 Yuquan Road, Beijing 100039, People's Republic of China
| |
Collapse
|
33
|
Parrotta L, Guerriero G, Sergeant K, Cai G, Hausman JF. Target or barrier? The cell wall of early- and later-diverging plants vs cadmium toxicity: differences in the response mechanisms. FRONTIERS IN PLANT SCIENCE 2015; 6:133. [PMID: 25814996 PMCID: PMC4357295 DOI: 10.3389/fpls.2015.00133] [Citation(s) in RCA: 194] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 02/19/2015] [Indexed: 05/19/2023]
Abstract
Increasing industrialization and urbanization result in emission of pollutants in the environment including toxic heavy metals, as cadmium and lead. Among the different heavy metals contaminating the environment, cadmium raises great concern, as it is ecotoxic and as such can heavily impact ecosystems. The cell wall is the first structure of plant cells to come in contact with heavy metals. Its composition, characterized by proteins, polysaccharides and in some instances lignin and other phenolic compounds, confers the ability to bind non-covalently and/or covalently heavy metals via functional groups. A strong body of evidence in the literature has shown the role of the cell wall in heavy metal response: it sequesters heavy metals, but at the same time its synthesis and composition can be severely affected. The present review analyzes the dual property of plant cell walls, i.e., barrier and target of heavy metals, by taking Cd toxicity as example. Following a summary of the known physiological and biochemical responses of plants to Cd, the review compares the wall-related mechanisms in early- and later-diverging land plants, by considering the diversity in cell wall composition. By doing so, common as well as unique response mechanisms to metal/cadmium toxicity are identified among plant phyla and discussed. After discussing the role of hyperaccumulators' cell walls as a particular case, the review concludes by considering important aspects for plant engineering.
Collapse
Affiliation(s)
- Luigi Parrotta
- Dipartimento Scienze della Vita, Università di Siena, Siena, Italy
| | - Gea Guerriero
- Environmental Research and Innovation, Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
| | - Kjell Sergeant
- Environmental Research and Innovation, Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
| | - Giampiero Cai
- Dipartimento Scienze della Vita, Università di Siena, Siena, Italy
| | - Jean-Francois Hausman
- Environmental Research and Innovation, Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
| |
Collapse
|
34
|
Gu CS, Liu LQ, Deng YM, Zhu XD, Huang SZ, Lu XQ. The heterologous expression of the Iris lactea var. chinensis type 2 metallothionein IlMT2b gene enhances copper tolerance in Arabidopsis thaliana. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 94:247-253. [PMID: 25533567 DOI: 10.1007/s00128-014-1444-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 12/13/2014] [Indexed: 05/29/2023]
Abstract
Iris lactea var. chinensis (I. lactea var. chinensis) is a widely adapted perennial species with a high level of copper tolerance. To evaluate the role of metallothioneins (MTs) in copper tolerance in I. lactea var. chinensis, a full-length cDNA homologue of MT2, designated IlMT2b (GenBank accession No. AB907788), was cloned using the RACE-PCR method. The expression level of IlMT2b in the leaves and roots of I. lactea var. chinensis was induced in response to copper (Cu) treatment. Ectopic expression of IlMT2b in Arabidopsis thaliana increased the Cu concentration and reduced H2O2 production in the transgenic plants. After treatment with 50 and 100 μM Cu, the root length of two transgenic seedlings was respectively about 1.5- and 3-fold longer than that of the wild-type. Together, these results suggested that IlMT2b may represent a useful target gene for the phytoremediation of Cu-polluted soil.
Collapse
Affiliation(s)
- Chun-Sun Gu
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing, Jiangsu Province, China
| | | | | | | | | | | |
Collapse
|
35
|
Yuan H, Zhang Y, Huang S, Yang Y, Gu C. Effects of exogenous glutathione and cysteine on growth, lead accumulation, and tolerance of Iris lactea var. chinensis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:2808-16. [PMID: 25212813 DOI: 10.1007/s11356-014-3535-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 08/28/2014] [Indexed: 05/20/2023]
Abstract
Effects of exogenous reduced glutathione (GSH) and cysteine (Cys) on growth, lead (Pb) accumulation, and nonprotein thiol (NPT) contents of Iris lactea var. chinensis under 100 and 500 mg L(-1) Pb stress were studied. Our results showed that 500 mg L(-1) Pb stress caused a dramatical decline in fresh weights, while the reduction of aboveground biomass was alleviated by exogenous GSH and Cys even though keeping higher Pb contents in roots and shoots. Exogenous GSH and Cys could enhance Pb accumulation in the shoots and roots compared with single Pb treatment. The promoting effect of GSH to Pb accumulation was larger than the effect of Cys, and the Pb contents in the shoots and roots treated with 500 mg L(-1) Pb + GSH reached 1,712 and 14,603 mg kg(-1), about 4.19 and 2.78 times of single 500 mg L(-1) Pb treatment, respectively. Microscopic imaging of Pb in roots and leaves showed that higher intensive fluorescence was observed in cell wall of root epidermis, stele, vascular tissues of the roots, and sclerenchyma cells of leaves treated with 500 mg L(-1) Pb + GSH and treated with 500 mg L(-1) Pb + Cys. Exogenous GSH had an apparent promoting effect on root and shoot GSH synthesis, while exogenous Cys reduced the synthesis of cellular GSH in shoot and increased Cys contents. Pb only induced the synthesis of phytochelatin (PC)2 in roots, and the PC2 content declined in GSH- and Cys-treated plant roots. These results suggested that GSH synthesis was a more effective approach to improve Pb accumulation and translocation of I. lactea var. chinensis. Further analysis of protein expression in plants by exogenous GSH and buthionine sulfoximine (BSO) application showed that the proteins regulated by GSH and BSO may constitute various enzymes involved in GSH biosynthesis and play certain roles in Pb accumulation and tolerance of I. lactea var. chinensis.
Collapse
Affiliation(s)
- Haiyan Yuan
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | | | | | | | | |
Collapse
|
36
|
Gu CS, Liu LQ, Zhao YH, Deng YM, Zhu XD, Huang SZ. Overexpression of Iris. lactea var. chinensis metallothionein llMT2a enhances cadmium tolerance in Arabidopsis thaliana. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 105:22-28. [PMID: 24780229 DOI: 10.1016/j.ecoenv.2014.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 03/31/2014] [Accepted: 04/01/2014] [Indexed: 06/03/2023]
Abstract
Metallothioneins (MTs) are cysteine-rich, low molecular weight, heavy metal-binding protein molecules. Here, a full-length cDNA homologue of MT2a (type 2 metallothionein) was isolated from the cadmium-tolerant species Iris. lactea var. chinensis (I. lactea var. chinensis). Expression of IlMT2a in I. lactea var. chinensis roots and leaves was up-regulated in response to cadmium stress. When the gene was constitutively expressed in Arabidopsis thaliana (A. thaliana), root length of transgenic lines was longer than that of wild-type under 50μM or 100μM cadmium stress. However, there was no difference of cadmium absorption between wild-type and trangenic lines. Histochemical staining by 3,3-diaminobenzidine (DAB) and nitroblue tetrazoliu (NBT) clearly demonstrated that transgenic lines accumulated remarkably less H2O2 and O2(-) than wild-type. Together, IlMT2a may be a promising gene for the cadmium tolerance improvement.
Collapse
Affiliation(s)
- Chun-Sun Gu
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing 210014, China
| | - Liang-qin Liu
- College of Horticulture, Nanjing Agricultural University Nanjing 210014, China
| | - Yan-Hai Zhao
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing 210014, China
| | - Yan-ming Deng
- Institute of Agrobiotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Xu-dong Zhu
- College of Horticulture, Nanjing Agricultural University Nanjing 210014, China
| | - Su-Zhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing 210014, China.
| |
Collapse
|
37
|
Gu CS, Liu LQ, Xu C, Zhao YH, Zhu XD, Huang SZ. Reference gene selection for quantitative real-time RT-PCR normalization in Iris. lactea var. chinensis roots under cadmium, lead, and salt stress conditions. ScientificWorldJournal 2014; 2014:532713. [PMID: 24977206 PMCID: PMC4058273 DOI: 10.1155/2014/532713] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/24/2014] [Accepted: 04/30/2014] [Indexed: 11/17/2022] Open
Abstract
Quantitative real time PCR (RT-qPCR) has emerged as an accurate and sensitive method to measure the gene expression. However, obtaining reliable result depends on the selection of reference genes which normalize differences among samples. In this study, we assessed the expression stability of seven reference genes, namely, ubiquitin-protein ligase UBC9 (UBC), tubulin alpha-5 (TUBLIN), eukaryotic translation initiation factor (EIF-5A), translation elongation factor EF1A (EF1 α ), translation elongation factor EF1B (EF1b), actin11 (ACTIN), and histone H3 (HIS), in Iris. lactea var. chinensis (I. lactea var. chinensis) root when the plants were subjected to cadmium (Cd), lead (Pb), and salt stress conditions. All seven reference genes showed a relatively wide range of threshold cycles (C t ) values in different samples. GeNorm and NormFinder algorithms were used to assess the suitable reference genes. The results from the two software units showed that EIF-5A and UBC were the most stable reference genes across all of the tested samples, while TUBLIN was unsuitable as internal controls. I. lactea var. chinensis is tolerant to Cd, Pb, and salt. Our results will benefit future research on gene expression in response to the three abiotic stresses.
Collapse
Affiliation(s)
- Chun-Sun Gu
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing, Jiangsu 210014, China
| | - Liang-qin Liu
- College of Horticulture, Nanjing Agricultural University, Nanjing 210014, China
| | - Chen Xu
- College of Landscape Architecture Profiles, Nanjing Forestry University, Nanjing 210014, China
| | - Yan-hai Zhao
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing, Jiangsu 210014, China
| | - Xu-dong Zhu
- College of Horticulture, Nanjing Agricultural University, Nanjing 210014, China
| | - Su-Zhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing, Jiangsu 210014, China
| |
Collapse
|
38
|
Li S, Wang F, Ru M, Ni W. Cadmium tolerance and accumulation of Elsholtzia argyi origining from a zinc/lead mining site - a hydroponics experiment. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2014; 16:1257-1267. [PMID: 24933916 DOI: 10.1080/15226514.2013.828010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, a hydroponics experiment was conducted to investigate the characteristics of Cd tolerance and accumulation of Elsholtzia argyi natively growing on the soil with high levels of heavy metals in a Zn/Pb mining site. Seedlings of E. argyi grown for 4 weeks and then were treated with 0(CK), 5,10,15, 20, 25, 30, 40, 50,100 umM Cd for 21 days. Each treatment had three replications. No visual toxic symptoms on shoots of E. argyi were observed at Cd level < or = 50 muM. The results indicated that the dry biomass of each tissue and the whole plants of the treatments with < or =40 umM cadmium were similar to that of the control, implying that E. argyi was a cadmium tolerant plant. The results also showed that the shoot Cd concentration significantly (P < 0.05) increased with the increase in the Cd level in nutrient solution. The shoot Cd concentration of the treatment with 40 umM Cd was as high as 237.9 mg kg(-1), which was higher than 100 mg kg(-1), normally used as the threshold concentration for identifying the Cd hyperaccumulating plant. It could be concluded that E. argyi was a Cd tolerant and accumulating plant species.
Collapse
|
39
|
|
40
|
Liu Z, He X, Chen W, Zhao M. Ecotoxicological responses of three ornamental herb species to cadmium. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2013; 32:1746-1751. [PMID: 23564584 DOI: 10.1002/etc.2237] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 01/29/2013] [Accepted: 03/27/2013] [Indexed: 06/02/2023]
Abstract
Cadmium is one of the most toxic elements. The ideal vegetal cover should be ensured by the selection of appropriate plant species for successful phytoremediation. In the present study, the ecotoxicological effects of Cd on the following 3 ornamental herbs were investigated: Italian ryegrass (Lolium multiflorum Lam.), white clover (Trifolium repens L.), and alfalfa (Medicago sativa L.). Based on the inhibition rate of seed germination, root and shoot elongation, early seedling growth, median inhibition concentration (IC50) values, and index of tolerance (IT) values, ecotoxicological indicators were determined. The results showed that 10 μM to 50 μM Cd had little effect on seed germination or root and shoot elongation of the 3 ornamental herbs (p > 0.01). With an increase in Cd concentrations, alfalfa (M. sativa) was the most sensitive to Cd toxicity in terms of seed germination and root elongation. Based on the IC50 of root elongation, Italian ryegrass (L. multiflorum) was the least sensitive to Cd. Based on the IC50 of seed germination and shoot elongation, white clover had the least sensitivity to Cd. Among the 3 ornamental herbs, based on the IC50 of seed germination and root and shoot elongation, alfalfa (M. sativa) was all the most sensitive plant. According to the index of tolerance, Italian ryegrass (L. multiflorum) was the most tolerant plant.
Collapse
Affiliation(s)
- Zhouli Liu
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | | | | | | |
Collapse
|
41
|
Wu J, Wang L, Ma F, Yang J, Li S, Li Z. Effects of vegetative-periodic-induced rhizosphere variation on the uptake and translocation of metals in Phragmites australis (Cav.) Trin ex. Steudel growing in the Sun Island Wetland. ECOTOXICOLOGY (LONDON, ENGLAND) 2013; 22:608-618. [PMID: 23455898 DOI: 10.1007/s10646-013-1052-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/09/2013] [Indexed: 06/01/2023]
Abstract
To evaluate the vegetative periodic effect of rhizosphere on the patterns of metal bioaccumulation, the concentrations of Mg, K, Ca, Mn, Zn, Fe, Cu, Cr, Ni, Cd and Pb in the corresponding rhizosphere soil and tissues of Phragmites australis growing in the Sun Island wetland (Harbin, China) were compared. The concentrations of Zn, Fe, Cu, Cr, Ni, Cd and Pb in roots were higher than in shoots, suggesting that roots are the primary accumulation organs for these metals and there exists an exclusion strategy for metal tolerance. In contrast, the rest of the metals showed an opposite trend, suggesting that they were not restricted in roots. Harvesting would particularly be an effective method to remove Mn from the environment. The concentrations of metals in shoots were generally higher in autumn than in summer, suggesting that Ph. australis possesses an efficient root-to-shoot translocation system, which is activated at the end of the growing season and allows more metals into the senescent tissues. Furthermore, metal bioaccumulation of Ph. australis was affected by vegetative periodic variation through the changing of physicochemical and microbial conditions. The rhizospheric microbial characteristics were significantly related to the concentrations of Mg, K, Zn, Fe and Cu, suggesting that microbial influence on metal accumulation is specific and selective, not eurytopic.
Collapse
Affiliation(s)
- Jieting Wu
- State Key Lab of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China
| | | | | | | | | | | |
Collapse
|
42
|
Jiang ZF, Huang SZ, Han YL, Zhao JZ, Fu JJ. Physiological response of Cu and Cu mine tailing remediation of Paulownia fortunei (Seem) Hemsl. ECOTOXICOLOGY (LONDON, ENGLAND) 2012; 21:759-767. [PMID: 22161020 DOI: 10.1007/s10646-011-0836-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/29/2011] [Indexed: 05/31/2023]
Abstract
The physiological responses and Cu accumulation of Paulownia fortunei (Seem) Hemsl. were studied under 15.7-157 μmol L(-1) Cu treatments in liquid culture for 14 days; the impacts of Cu concentration in the seedlings were evaluated under Cu mine tailing culture with acetic acid and EDTA treatment for 60 days. Results showed that the concentrations of Chl-a, Chl-b and Carotenoids significantly increased (p < 0.05) at 15.7-78.7 μmol L(-1)Cu treatment and significantly decreased at 157 μmol L(-1) treatment after 14 days of Cu exposure. The activities of superoxide dismutase (SOD) and catalase (CAT) significantly increased as Cu levels were enhanced and the activities of both SOD and CAT under 157 μmol L(-1) Cu stress were 2.9 and 1.9 times higher than that of control, respectively. The concentrations of proline and soluble sugars in the leaves of P. fortunei significantly increased as the Cu concentrations were elevated. Cu concentrations in roots, stems and leaves of P. fortunei increased significantly as Cu levels increased and reached 1911, 101 and 93 μg g(-1) dry weights (DW) at 157 μmol L(-1) Cu treatment, respectively. The seedlings of P. fortunei cultivated in Cu tailing experienced unsuccessful growth and loss of leaves in all treatments due to poor nutrition of the Cu tailing. The dry weight of P. fortunei increased under all the treatments of acetic acid after 60 days exposure. However, dry weight significantly decreased under both levels of EDTA. The Cu concentrations increased significantly in roots and decreased in leaves when each was treated with both concentrations of acetic acid. The Cu concentrations in the roots, stems and leaves increased significantly, and the concentrations of Cu in the stems and leaves under the treatment of 2 μmol L(-1) EDTA reached 189.5 and 763.1 μg g(-1) DW, respectively. The result indicated that SOD, CAT, proline and soluble sugars played an important role in coping with the oxidative stress of copper. Acetic acid could promote growth and EDTA at the experimental levels, which could also enhance Cu absorption and translocation into the stems and leaves of P. fortune. Furthermore, acetic acid and EDTA could be rationally utilized in Cu-contaminated soil.
Collapse
Affiliation(s)
- Zao-Fa Jiang
- Experimental Teaching Center of Ecological Environment of Jiangxi Province, Department of Landscape Architecture, Art College, Jiangxi University of Finance and Economics, Nanchang 330032, People's Republic of China
| | | | | | | | | |
Collapse
|
43
|
Mechanisms of Cd Hyperaccumulation and Detoxification in Heavy Metal Hyperaccumulators: How Plants Cope with Cd. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/978-3-642-22746-2_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
44
|
Liu Z, He X, Chen W. Effects of cadmium hyperaccumulation on the concentrations of four trace elements in Lonicera japonica Thunb. ECOTOXICOLOGY (LONDON, ENGLAND) 2011; 20:698-705. [PMID: 21318389 DOI: 10.1007/s10646-011-0609-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/01/2011] [Indexed: 05/30/2023]
Abstract
Hyperaccumulators are important in the phytoremediation of cadmium (Cd)-contaminated soil. In this study, Cd accumulation and the interactions between Cd and four other trace elements (Fe, Mn, Cu, and Zn) in Lonicera japonica Thunb. were investigated. As a result of exposure to soil containing 50 mg kg(-1) Cd, stem and shoot Cd concentrations reached 344.49 ± 0.71 and 286.12 ± 9.38 μg g(-1) DW respectively, without showing symptoms of visible damage to the plants. This suggests that L. japonica has a strong tolerance to Cd. It is proposed that trace metal elements are involved in the Cd-detoxification mechanisms shown by hyperaccumulators. There is a synergistic interaction in accumulation and translocation between Cd and Fe and a significantly negative correlation between Cd and Cu or Zn concentrations in L. japonica plant tissues. The imbalanced trace element concentrations influences detoxification processes to Cd, therefore, L. japonica could be considered as a new Cd-hyperaccumulator model to investigate the metal tolerance strategies of plants.
Collapse
Affiliation(s)
- Zhouli Liu
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, Shenhe District, Shenyang, 110016, People's Republic of China
| | | | | |
Collapse
|
45
|
Zhang Z, Rengel Z, Meney K, Pantelic L, Tomanovic R. Polynuclear aromatic hydrocarbons (PAHs) mediate cadmium toxicity to an emergent wetland species. JOURNAL OF HAZARDOUS MATERIALS 2011; 189:119-126. [PMID: 21367520 DOI: 10.1016/j.jhazmat.2011.02.007] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 02/03/2011] [Accepted: 02/03/2011] [Indexed: 05/28/2023]
Abstract
Growth and pollutant removal by emergent wetland plants may be influenced by interactions among mixed pollutants in constructed wetlands. A glasshouse experiment was conducted to investigate interactive effects of cadmium (Cd) × polynuclear aromatic hydrocarbons (PAHs) × plant treatments on growth of Juncus subsecundus, Cd and PAH removal from soil and the total number of microorganisms in soil. Growth and biomass of J. subsecundus were significantly influenced by interaction of Cd and PAHs, significantly decreasing with either Cd or PAH additions, but with the effect of Cd on plant growth being stronger than that of PAHs. The mixture of low Cd and low PAH lessened Cd toxicity to plants, resulting in improved plant growth and increased Cd accumulation in plant tissues, thus enhancing Cd removal by plants. The dissipation of PAHs in soils was significantly influenced by interactions of Cd, PAH and plant presence or absence. The total number of microorganisms in soils was significantly increased by the PAH additions. The interactive effect of Cd and PAHs on plant growth may be linked to the changes in the abundance of microorganisms in the rhizosphere, probably via a positive effect of PAH metabolites and/or phytohormones produced by microorganisms on plant growth.
Collapse
Affiliation(s)
- Zhenhua Zhang
- School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | | | | | | | | |
Collapse
|
46
|
Wu FZ, Yang WQ, Zhang J, Zhou LQ. Growth Responses and Metal Accumulation in an Ornamental Plant (Osmanthus fragrans var. thunbergii) Submitted to Different Cd Levels. ACTA ACUST UNITED AC 2011. [DOI: 10.5402/2011/738138] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To characterize the effects of Cd supplies on the accumulation efficiency of Cd, Pb, Zn, and Cu in an ornamental plant (osmanthus, Osmanthus fragrans var. thunbergii), a pot experiment using current-year osmanthus in field was carried out in western China. Biomass and its components showed a decreasing tendency as Cd supply increased, though insignificant differences were observed between treatments with a low and no Cd supply. Cd supplies increased the concentrations of Cd and Pb in plants, but the concentrations of Zn and Cu in plant showed a decreasing tendency with the increase of Cd supplies. Cd supplies also increased Cd accumulation for the plant, although the highest Cd accumulation was observed at a low Cd supply (T1). A higher Pb accumulation in the osmanthus was also detected in T1 than the other treatments. However, Zn and Cu accumulations decreased with the increase of Cd supplies. The examined osmanthus showed relative higher Cd and Pb transfer efficiencies in the presence of Cd supplies, but Cd supplies can limit the transfer of Zn and Cu. The results suggested that the examined osmanthus has potential for use in metal-contaminated environments due to phytoremediation application in the soil.
Collapse
Affiliation(s)
- Fu-Zhong Wu
- Faculty of Forestry, Sichuan Agricultural University, Ya'an 625014, China
| | - Wan-Qin Yang
- Faculty of Forestry, Sichuan Agricultural University, Ya'an 625014, China
| | - Jian Zhang
- Faculty of Forestry, Sichuan Agricultural University, Ya'an 625014, China
| | - Li-Qiang Zhou
- Faculty of Forestry, Sichuan Agricultural University, Ya'an 625014, China
| |
Collapse
|
47
|
Wu F, Yang W, Zhang J, Zhou L. Cadmium accumulation and growth responses of a poplar (Populus deltoidsxPopulus nigra) in cadmium contaminated purple soil and alluvial soil. JOURNAL OF HAZARDOUS MATERIALS 2010; 177:268-73. [PMID: 20042282 DOI: 10.1016/j.jhazmat.2009.12.028] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Revised: 12/02/2009] [Accepted: 12/04/2009] [Indexed: 05/08/2023]
Abstract
To characterize the phytoextraction efficiency of a hybrid poplar (Populus deltoidsxPopulus nigra) in cadmium contaminated purple soil and alluvial soil, a pot experiment in field was carried out in Sichuan basin, western China. After one growing period, the poplar accumulated the highest of 541.98+/-19.22 and 576.75+/-40.55 microg cadmium per plant with 110.77+/-12.68 and 202.54+/-19.12 g dry mass in these contaminated purple soil and alluvial soil, respectively. Higher phytoextraction efficiency with higher cadmium concentration in tissues was observed in poplar growing in purple soil than that in alluvial soil at relative lower soil cadmium concentration. The poplar growing in alluvial soil had relative higher tolerance ability with lower reduction rates of morphological and growth characters than that in purple soil, suggesting that the poplar growing in alluvial soil might display the higher phytoextraction ability when cadmium contamination level increased. Even so, the poplars exhibited obvious cadmium transport from root to shoot in both soils regardless of cadmium contamination levels. It implies that this examined poplar can extract more cadmium than some hyperaccumulators. The results indicated that metal phytoextraction using the poplar can be applied to clean up soils moderately contaminated by cadmium in these purple soil and alluvial soil.
Collapse
Affiliation(s)
- Fuzhong Wu
- Faculty of Forestry, Sichuan Agricultural University, 625014 Ya'an, PR China
| | | | | | | |
Collapse
|
48
|
Zhou YQ, Huang SZ, Yu SL, Gu JG, Zhao JZ, Han YL, Fu JJ. The physiological response and sub-cellular localization of lead and cadmium in Iris pseudacorus L. ECOTOXICOLOGY (LONDON, ENGLAND) 2010; 19:69-76. [PMID: 19629681 DOI: 10.1007/s10646-009-0389-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Accepted: 07/04/2009] [Indexed: 05/27/2023]
Abstract
The seedling development and physiological responses of Iris pseudacorus L. to Pb and Cd and their combination were studied for 28 days liquid culture and sub-cellular localization of Pb and Cd in the root tip cells treated with 2,070 mg L(-1) Pb and 1,000 mg L(-1)Cd for 16 days sand culture was evaluated. Results showed that the dry weights (DWs) of shoots and roots of I. pseudacorus were significantly decreased at 500 mg L(-1)Pb and 25 mg L(-1)Cd + 500 mg L(-1)Pb treatments and the root DWs under all treatments were significantly decreased in comparison with that of control. The concentrations of Chla in the leaves were decreased at all treatments, while, the concentrations of Chlb and total carotenoids were not significantly decreased under 25 mg L(-1)Cd and 25 mg L(-1)Cd + 500 mg L(-1)Pb treatments. The MDA and proline concentrations and POD activities in the shoots and roots were increased under treatments of 500 mg L(-1)Pb and 25 mg L(-1)Cd + 500 mg L(-1)Pb, but POD activities in the shoots and roots and MDA concentrations in the shoots were significantly decreased at 25 mg L(-1) Cd treatment. The results of sub-cellular localization of Pb and Cd showed that numerous Pb deposits were found on the inner surface of died cell walls in the cortex treated with 2,070 mg L(-1) Pb and Cd deposits were found in the cell wall treated with 1,000 mg L(-1) Cd. Pb and Cd deposits were not found in the cytoplasm. The results indicated that POD and proline showed strong beneficial properties against Pb and Cd stress and there were some mechanisms keeping most cells with normal activities in the plant from Pb toxicity by sacrificing a few cells that accumulated a large amount Pb. Sub-cellular localizations of Pb and Cd in the root tip cells of I. pseudacorus were little difference with the localizations in other species of Iris in the previous studies.
Collapse
Affiliation(s)
- Yu-Qing Zhou
- Institute of Botany, Jiangsu province and Chinese Academy of Science, 210014 Nanjing, Jiangsu, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
49
|
Liu Z, He X, Chen W, Yuan F, Yan K, Tao D. Accumulation and tolerance characteristics of cadmium in a potential hyperaccumulator--Lonicera japonica Thunb. JOURNAL OF HAZARDOUS MATERIALS 2009; 169:170-5. [PMID: 19380199 DOI: 10.1016/j.jhazmat.2009.03.090] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 03/16/2009] [Accepted: 03/18/2009] [Indexed: 05/15/2023]
Abstract
Phytoremediation using hyperaccumulators is a promising technique of removing soil pollutants. In the study, growth responses, cadmium (Cd) accumulation capability and physiological mechanisms of Lonicera japonica Thunb. under Cd stress were investigated. Exposed to 5 and 10 mg L(-1) Cd, the plants did not show any visual symptoms, furthermore, the height, dry biomass of leaves, roots and total and the chlorophyll (CHL) content were obtained different grade increase. When the concentration of Cd was up to 50 mg L(-1), the height, dry biomass of leaves and roots had not significant differences compared with the control. The indexes of tolerance (IT) were all above 0.8. The maintenance of high superoxide dismutase (SOD) and catalase (CAT) activities was observed along with the increased Cd concentration, suggesting strong internal detoxification mechanisms inside plant cells. After 21 days exposure to 25 mg L(-1) Cd, stem and shoot Cd concentrations reached 344.49+/-0.71 and 286.12+/-9.38 microg g(-1) DW, respectively and the plant had higher bioaccumulation coefficient (BC) and translocation factor (TF). According to these results, it was shown L. japonica had strong tolerance and accumulation capability to Cd, therefore it is a potential Cd-hyperaccumulator.
Collapse
Affiliation(s)
- Zhouli Liu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenhe District, Shenyang 110016, People's Republic of China
| | | | | | | | | | | |
Collapse
|
50
|
Kovácik J, Backor M. Oxidative status of Matricaria chamomilla plants related to cadmium and copper uptake. ECOTOXICOLOGY (LONDON, ENGLAND) 2008; 17:471-479. [PMID: 18389371 DOI: 10.1007/s10646-008-0200-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2007] [Accepted: 03/20/2008] [Indexed: 05/26/2023]
Abstract
Cadmium (Cd) and copper (Cu) uptake by the plants of Matricaria chamomilla and relation to activities of guaiacol peroxidase (GPX, EC 1.11.1.7), catalase (CAT, EC 1.11.1.6) and glutathione reductase (GR, EC 1.6.4.2) up to 7 days of exposure to 3, 60 and 120 microM Cd or Cu was studied. Cd content in rosettes was ca. 10-fold higher in comparison to Cu while Cu was preferentially accumulated in the roots. In line with this observation, increase of CAT and GPX activity was similar in rosettes of Cd and Cu-treated plants, indicating non-redox active properties of Cd and low Cu accumulation. In the roots, Cu showed strong pro-oxidant effect, as judged from extreme stimulation of CAT and GPX, followed by increase of hydrogen peroxide and malondialdehyde. However, GPX seemed to be more important for alleviation of oxidative stress (ca. 93-250-fold higher activity in 120 microM Cu-treated roots). Cd had substantially lower influences and stimulated GR activity more than Cu. Activities of hydrogen peroxide-scavenging enzymes in relation to its accumulation are also discussed.
Collapse
Affiliation(s)
- Jozef Kovácik
- Department of Botany, Institute of Biology & Ecology, Faculty of Science, PJ Safárik University, Mánesova 23, Kosice, Slovak Republic.
| | | |
Collapse
|