scholarly journals Effects of Cadmium Stress on Physiological Indexes and Fruiting Body Nutritions of Agaricus Brasiliensis

2020 ◽  
Author(s):  
Lingyun Liu ◽  
Hua Chen ◽  
Jing Yuan ◽  
Yixiang Wang ◽  
Boqi Weng ◽  
...  
Keyword(s):  
Agronomic Traits ◽  
Cadmium Stress ◽  
Total Amino Acid ◽  
Fruiting Bodies ◽  
Cd Stress ◽  
Agaricus Brasiliensis ◽  
Nutritional Components ◽  
Physiological Indexes ◽  
Total Amino Acids ◽  
High Absorption

Abstract In this study, 0, 0.5, 1, 1.5, 2, 4, 6 and 8 mg·kg-1 of cadmium were added to the cultivation materials. In order to study the effects of different concentrations of Cd stress on J1 and J77, the contents of antioxidant enzymes, proline and malondialdehyde, Cd content, agronomic traits and yield of fruiting bodies of Agaricus brasiliensis were determined, and the nutritional components such as polysaccharide, triterpene, protein, total sugar and total amino acid were determined. The results showed that the physiological indexes of strain J1 and J77 changed regularly under different concentrations of Cd stress. J1 was a high absorption and low tolerance variety, while J77 was a low absorption and high tolerance variety. Low concentration of cadmium promoted the growth of strain J1, and higher concentration of Cd promoted the growth of strain J77. The contents of protein and total amino acids in the two strains changed greatly, followed by polysaccharides, which indicated that Cd stress had the greatest impact on the three nutrients, and other nutrients were not sensitive to Cd stress.

scholarly journals Effects of cadmium stress on physiological indexes and fruiting body nutritions of Agaricus brasiliensis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lingyun Liu ◽  
Hua Chen ◽  
Jing Yuan ◽  
Yixiang Wang ◽  
Boqi Weng ◽  
...  
Keyword(s):  
Agronomic Traits ◽  
Cadmium Stress ◽  
Total Amino Acid ◽  
Fruiting Bodies ◽  
Cd Stress ◽  
Agaricus Brasiliensis ◽  
Nutritional Components ◽  
Physiological Indexes ◽  
Total Amino Acids ◽  
High Absorption

AbstractIn this study, 0, 0.5, 1, 1.5, 2, 4, 6 and 8 mg·kg−1 of cadmium were added to the cultivation materials. In order to study the effects of different concentrations of Cd stress on J1 and J77, the contents of antioxidant enzymes, proline and malondialdehyde, Cd content, agronomic traits and yield of fruiting bodies of Agaricus brasiliensis were determined, and the nutritional components such as polysaccharide, triterpene, protein, total sugar and total amino acid were determined. The results showed that the physiological indexes of strain J1 and J77 changed regularly under different concentrations of Cd stress. J1 was a high absorption and low tolerance variety, while J77 was a low absorption and high tolerance variety. Low concentration of Cd promoted the growth of strain J1, and higher concentration of Cd promoted the growth of strain J77. The contents of protein and total amino acids in the two strains changed greatly, followed by polysaccharides, which indicated that Cd stress had the greatest impact on the three nutrients, and other nutrients were not sensitive to Cd stress.

scholarly journals Growth and Antioxidant Responses in Iron-Biofortified Lentil under Cadmium Stress

Toxics ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 182
Author(s):  
Ruchi Bansal ◽  
Swati Priya ◽  
Harsh Kumar Dikshit ◽  
Sherry Rachel Jacob ◽  
Mahesh Rao ◽  
...  
Keyword(s):  
Growth Parameters ◽  
Dry Weight ◽  
Cadmium Stress ◽  
Antioxidant Enzyme Activities ◽  
Limited Information ◽  
Cd Stress ◽  
Fresh Weight ◽  
Cd Uptake ◽  
Cd Tolerance ◽  
Controlled Conditions

Cadmium (Cd) is a hazardous heavy metal, toxic to our ecosystem even at low concentrations. Cd stress negatively affects plant growth and development by triggering oxidative stress. Limited information is available on the role of iron (Fe) in ameliorating Cd stress tolerance in legumes. This study assessed the effect of Cd stress in two lentil (Lens culinaris Medik.) varieties differing in seed Fe concentration (L4717 (Fe-biofortified) and JL3) under controlled conditions. Six biochemical traits, five growth parameters, and Cd uptake were recorded at the seedling stage (21 days after sowing) in the studied genotypes grown under controlled conditions at two levels (100 μM and 200 μM) of cadmium chloride (CdCl2). The studied traits revealed significant genotype, treatment, and genotype × treatment interactions. Cd-induced oxidative damage led to the accumulation of hydrogen peroxide (H2O2) and malondialdehyde in both genotypes. JL3 accumulated 77.1% more H2O2 and 75% more lipid peroxidation products than L4717 at the high Cd level. Antioxidant enzyme activities increased in response to Cd stress, with significant genotype, treatment, and genotype × treatment interactions (p < 0.01). L4717 had remarkably higher catalase (40.5%), peroxidase (43.9%), superoxide dismutase (31.7%), and glutathione reductase (47.3%) activities than JL3 under high Cd conditions. In addition, L4717 sustained better growth in terms of fresh weight and dry weight than JL3 under stress. JL3 exhibited high Cd uptake (14.87 mg g−1 fresh weight) compared to L4717 (7.32 mg g−1 fresh weight). The study concluded that the Fe-biofortified lentil genotype L4717 exhibited Cd tolerance by inciting an efficient antioxidative response to Cd toxicity. Further studies are required to elucidate the possibility of seed Fe content as a surrogacy trait for Cd tolerance.

scholarly journals Alternative Pathway is Involved in Nitric Oxide-Enhanced Tolerance to Cadmium Stress in Barley Roots

Plants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 557 ◽  
Author(s):  
Li He ◽  
Xiaomin Wang ◽  
Ruijun Feng ◽  
Qiang He ◽  
Shengwang Wang ◽  
...  
Keyword(s):  
Stress Tolerance ◽  
Alternative Pathway ◽  
Cadmium Stress ◽  
Cd Stress ◽  
No Donor ◽  
Ros Accumulation ◽  
Mda Content ◽  
Scavenging Enzymes ◽  
Tolerance To Cadmium

Alternative pathway (AP) has been widely accepted to be involved in enhancing tolerance to various environmental stresses. In this study, the role of AP in response to cadmium (Cd) stress in two barley varieties, highland barley (Kunlun14) and barley (Ganpi6), was investigated. Results showed that the malondialdehyde (MDA) content and electrolyte leakage (EL) level under Cd stress increased in two barley varieties. The expressions of alternative oxidase (AOX) genes (mainly AOX1a), AP capacity (Valt), and AOX protein amount were clearly induced more in Kunlun14 under Cd stress, and these parameters were further enhanced by applying sodium nitroprussid (SNP, a NO donor). Moreover, H2O2 and O2− contents were raised in the Cd-treated roots of two barley varieties, but they were markedly relieved by exogenous SNP. However, this mitigating effect was aggravated by salicylhydroxamic acid (SHAM, an AOX inhibitor), suggesting that AP contributes to NO-enhanced Cd stress tolerance. Further study demonstrated that the effect of SHAM application on reactive oxygen species (ROS)-related scavenging enzymes and antioxidants was minimal. These observations showed that AP exerts an indispensable function in NO-enhanced Cd stress tolerance in two barley varieties. AP was mainly responsible for regulating the ROS accumulation to maintain the homeostasis of redox state.

scholarly journals Transcriptomic analysis of Verbena bonariensis roots in response to cadmium stress

BMC Genomics ◽  
2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Meng-qi Wang ◽  
Zhen-yu Bai ◽  
Ya-fang Xiao ◽  
Yan Li ◽  
Qing-lin Liu ◽  
...  
Keyword(s):  
Cell Structure ◽  
Expression Patterns ◽  
Enrichment Analysis ◽  
Cadmium Stress ◽  
The Novel ◽  
Rna Seq ◽  
Cd Stress ◽  
Ros Scavenging ◽  
Molecular Alterations ◽  
Cd Tolerance

Abstract Background Cadmium (Cd) is a serious heavy metal (HM) soil pollutant. To alleviate or even eliminate HM pollution in soil, environmental-friendly methods are applied. One is that special plants are cultivated to absorb the HM in the contaminated soil. As an excellent economical plant with ornamental value and sound adaptability, V. bonariensis could be adapted to this very situation. In our study, the Cd tolerance in V. bonariensis was analyzed as well as an overall analysis of transcriptome. Results In this study, the tolerance of V. bonariensis to Cd stress was investigated in four aspects: germination, development, physiological changes, and molecular alterations. The results showed that as a non-hyperaccumulator, V. bonariensis did possess the Cd tolerance and the capability to concentration Cd. Under Cd stress, all 237, 866 transcripts and 191, 370 unigenes were constructed in the transcriptome data of V. bonariensis roots. The enrichment analysis of gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway revealed that differentially expressed genes (DEGs) under Cd stress were predominately related to cell structure, reactive oxygen species (ROS) scavenging system, chelating reaction and secondary metabolites, transpiration and photosynthesis. DEGs encoding lignin synthesis, chalcone synthase (CHS) and anthocyanidin synthase (ANS) were prominent in V. bonariensis under Cd stress. The expression patterns of 10 DEGs, validated by quantitative real-time polymerase chain reaction (qRT-PCR), were in highly accordance with the RNA-Sequence (RNA-Seq) results. The novel strategies brought by our study was not only benefit for further studies on the tolerance of Cd and functional genomics in V. bonariensis, but also for the improvement molecular breeding and phytoremediation.

Effects of Cadmium Stress on Alternative Oxidase and Photosystem II in Three Wheat Cultivars

2010 ◽  
Vol 65 (1-2) ◽  
pp. 87-94 ◽  
Author(s):  
Yong-Ping Duan ◽  
Shu Yuan ◽  
Shi-Hua Tu ◽  
Wen-Qiang Feng ◽  
Fei Xu ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Alternative Oxidase ◽  
Thiobarbituric Acid ◽  
Cadmium Stress ◽  
Wheat Cultivars ◽  
Cd Stress ◽  
Western Blots ◽  
Chlorophyll Contents ◽  
Water Contents ◽  
Cyanide Resistant Respiration

The effects of Cd stress (200 μmol/L, 8 days) on respiration and photosynthesis of three wheat cultivars were investigated: Chuanyu 12 (CY12), Chuanmai 42 (CM42), and Chuanmai 47 (CM47). Fifteen-day-old seedlings were exposed to 200 μmol/L CdCl2 for 4 days and 8 days, respectively. The results indicated that Cd was accumulated largely in roots, but little in leaves of all three cultivars. CY12 accumulated the highest level of Cd in roots and showed the weakest resistance. On the contrary, the other two cultivars, CM42 and CM47, adapted better to Cd stress, and their thiobarbituric acid-reactive substances (TBARS) contents were lower than in CY12, but the chlorophyll contents and water contents were higher than in CY12. Additionally, Cd stress prompted the alternative oxidase (AOX) activity and upregulated the cyanide-resistant respiration in CM42 and CM47 after 8 days; no such induction was observed for CY12. The CO2 assimilation rate, leaf stomatal conductance and chlorophyll fl uorescence were inhibited by Cd stress in all cultivars, but more severe in the CY12 cultivar. Western blots indicated that the content of the photosystem II proteins LHCII and D1 decreased in CY12, but did not change in CM42 and CM47. While the content of the mitochondrial AOX protein increased markedly in CM42 and CM47, it did not in CY12. These results suggested that AOX and LHCII could be regarded as indicators of plant’s resistance to heavy metals.

scholarly journals Photosynthetic light reactions in Oryza sativa L. under Cd stress: Influence of iron, calcium, and zinc supplements

2019 ◽  
Vol 3 (4) ◽  
pp. 175-181
Author(s):  
Abin Sebastian ◽  
M. N. V. Prasad
Keyword(s):  
Oryza Sativa L ◽  
Cadmium Stress ◽  
Photochemical Quenching ◽  
Linear Electron ◽  
Cd Stress ◽  
Cd Accumulation ◽  
Ca Ions ◽  
Zinc Supplements ◽  
Non Photochemical Quenching ◽  
Stress Influence

Abstract Some mineral nutrients may help to alleviate cadmium stress in plants. Therefore, influence of Fe, Ca, and Zn supplements on photosynthesis light reactions under Cd stress studied in two Indian rice cultivars namely, MO-16 and MTU-7029 respectively. Exogenous application of both Fe and Ca ions helped to uphold quantum efficiency and linear electron transport during Cd stress. Also, recovery of biomass noticed during Cd treatment with Fe and Ca supplements. It was found that accumulation of carotenoids as well as non photochemical quenching enhances with Fe, Ca, and Zn supplements. Chlorophyll a/b ratio increased with Cd accumulation as a strategy to increase light harvest. Lipid peroxidation level was ascertained the highest during Cd plus Zn treatments. Above results point that both Fe and Ca ions supplements help to alleviate Cd stress on photosynthesis light reactions of rice plants.

scholarly journals Survival Strategies of the Plant-Associated Bacterium Enterobacter sp. Strain EG16 under Cadmium Stress

2016 ◽  
Vol 82 (6) ◽  
pp. 1734-1744 ◽  
Author(s):  
Yanmei Chen ◽  
Yuanqing Chao ◽  
Yaying Li ◽  
Qingqi Lin ◽  
Jun Bai ◽  
...  
Keyword(s):  
Stress Response ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Sulfur Metabolism ◽  
Cadmium Stress ◽  
Survival Strategies ◽  
Cd Stress ◽  
Content Type ◽  
Energy Conserving

ABSTRACTPlant-associated bacteria are of great interest because of their potential use in phytoremediation. However, their ability to survive and promote plant growth in metal-polluted soils remains unclear. In this study, a soilborne Cd-resistant bacterium was isolated and identified asEnterobactersp. strain EG16. It tolerates high external Cd concentrations (Cd2+MIC, >250 mg liter−1) and is able to produce siderophores and the plant hormone indole-3-acetic acid (IAA), both of which contribute to plant growth promotion. Surface biosorption in this strain accounted for 31% of the total Cd accumulated. The potential presence of cadmium sulfide, shown by energy-dispersive X-ray (EDX) analysis, suggested intracellular Cd binding as a Cd response mechanism of the isolate. Cd exposure resulted in global regulation at the transcriptomic level, with the bacterium switching to an energy-conserving mode by inhibiting energy-consuming processes while increasing the production of stress-related proteins. The stress response system included increased import of sulfur and iron, which become deficient under Cd stress, and the redirection of sulfur metabolism to the maintenance of intracellular glutathione levels in response to Cd toxicity. Increased production of siderophores, responding to Cd-induced Fe deficiency, not only is involved in the Cd stress response systems of EG16 but may also play an important role in promoting plant growth as well as alleviating the Cd-induced inhibition of IAA production. The newly isolated strain EG16 may be a suitable candidate for microbially assisted phytoremediation due to its high resistance to Cd and its Cd-induced siderophore production, which is likely to contribute to plant growth promotion.

scholarly journals The Effects of Magnetic Treatment On Seedling Growth, Nitrogen Metabolism, And Mineral Nutrient Contents In Populus×Euramericana 'Neva' Under Cadmium Stress

2021 ◽  
Author(s):  
Xiumei Liu ◽  
Fengyun Ma ◽  
Lu Wang ◽  
Hong Zhu ◽  
Shiyuan Meng ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Root Morphology ◽  
Glutamate Synthase ◽  
Cadmium Stress ◽  
Magnetic Treatment ◽  
Mineral Nutrient ◽  
Cd Stress ◽  
Nutrient Metabolism ◽  
Nutrient Contents ◽  
Populus Euramericana

Abstract Background: The potted experiment was carried out to investigate the mechanism of nutrient metabolism and seedling growth caused by magnetic treatment (MT) following exposure to cadmium (Cd) stress. One-year-old seedlings of Populus×euramericana 'Neva' were treated with different Cd(NO3)2 solutions for 30 days. Properties of seedling growth and root morphology were promoted by MT under Cd exposure.Results: Contents of ammonium (NH4+-N), nitrate (NO3--N), and total nitrogen (TN) in leaves, also NH4+-N and TN in roots, were increased by MT combined with Cd-stress, although NO3--N content was decreased. Activities of nitrate reductase (NR), nitrite reductase (NiR), glutathione reductase (GR), and glutamate synthase (GOGAT) in leaves and activities of NR, GS and GOGAT in roots were stimulated by MT; conversely, NiR activity in roots was inhibited. MT improved the synthesis of cysteine (Cys) and glutamine (Gln) in leaves and reduced the contents of glutamic acid (Glu) and glycine (Gly), while contents of Cys, Glu, Gln, and Gly were increased in roots. (4) The contents of Ca, Mg, Fe, Mn, Zn and Cu were increased by MT under Cd stress in leaves, whereas content of K was reduced. In roots, contents of K, Ca, and Fe were increased by MT under Cd-stress, but the contents of Na, Mg, Mn, Zn, and Cu were decreased.Conclusions: Magnetization could regulate the uptake of mineral nutrients by roots and translocation from the roots to aboveground parts by affecting the root morphology. MT could also improve nitrogen assimilation and the synthesis of free amino acids by stimulating the activities of key enzymes.

scholarly journals The Effect of Nitric Oxide on Amaranthus Tricolor L. Under Cadmium Stress

2021 ◽  
Author(s):  
Fatemeh Baniasadi ◽  
Masoud Arghavani ◽  
Vahid Reza Saffari ◽  
Mehdi Mansouri
Keyword(s):  
Nitric Oxide ◽  
Lipid Peroxidation ◽  
Cadmium Stress ◽  
Total Protein Content ◽  
Plant Tolerance ◽  
Cd Stress ◽  
Multivariate Statistical ◽  
Cd Toxicity ◽  
Medium Level ◽  
Negative Impacts

Abstract This study aimed to appraise the crosstalk between sodium nitroprusside (SNP), as a source of nitric oxide (NO), and cadmium (Cd) toxicity on growth and physiological traits in Amaranth tricolor L. by using different multivariate statistical methods. The results showed that growth-related traits of A. tricolor were significantly reduced (p<0.05) under Cd stress. Contrarily, Cd treatments increased lipid peroxidation and reduced total protein content. Delving on the results of SNP application showed the suitability of its medium level (100 µM) on increasing the growth-related traits and also plant tolerance to Cd stress via lowering the lipid peroxidation and radical molecules production due to the higher activities of superoxide dismutase and catalase. Increasing the amount of Cd in roots and shoots, as the results of Cd treatment, reduced the growth and production of A. tricolor plants by high rates (over 50% in 60 mg kg-1 Cd level) indicating its susceptibility to high Cd toxicity. Contrarily, treating plants with NO showed no effect on shoot Cd content, while it significantly increased Cd allocation in the root, which might be attributable to the protective effect of NO on Cd toxicity by trapping Cd in the root. Subsequently, the application of a medium level of SNP (around 100 µM) is recommendable for A. tricolor plant to overcome the negative impacts of Cd toxicity.

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