Physiological, Anatomical, and Transcriptional Responses of Mulberry (Morus alba L.) to Cd Stress in Contaminated Soil

2021 ◽  
pp. 117387
Author(s):  
Zhaohui Guo ◽  
Peng Zeng ◽  
Xiyuan Xiao ◽  
Chi Peng
Keyword(s):  
Contaminated Soil ◽  
Morus Alba ◽  
Cd Stress ◽  
Transcriptional Responses

scholarly journals Morphological and Physiological Changes of Broussonetia papyrifera Seedlings in Cadmium Contaminated Soil

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1698
Author(s):  
Wan Zhang ◽  
Yunlin Zhao ◽  
Zhenggang Xu ◽  
Huimin Huang ◽  
Jiakang Zhou ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Tree Species ◽  
Soluble Sugar ◽  
Translocation Factor ◽  
Cd Stress ◽  
Broussonetia Papyrifera ◽  
Adaptation Mechanism ◽  
Good Tolerance ◽  
Growth Of Seedlings ◽  
Cadmium Contaminated Soil

Broussonetia papyrifera is a widely distributed economic tree species, and it is also a pioneer species in adverse environments. In order to investigate the growth and adaptation mechanism of B. papyrifera under cadmium (Cd) contaminated soil, potted experiments were used with six-month treatments to study Cd enrichment and the transportation, morphological and physiological characteristics of B. papyrifera tissues. The results showed that Cd mainly accumulated in the root when the Cd concentration was high (14.71 mg/kg), and the root biomass was significantly reduced by Cd stress although Cd promoted the growth of seedlings. The bioconcentration factors (BCF) increased with the increase in Cd concentration, and reached the maximum value of 0.21 at 14.71 mg/kg. On the contrary, translocation factor (TF) decreased significantly at 8.28–14.71 mg/kg Cd concentration. Cd not only led to the loose arrangement of the xylem vessels of leaves, but also changed the chlorophyll content. However, B. papyrifera could synthesize organic solutes such as soluble protein, soluble sugar and proline to reduce the intracellular osmotic potential. Our study proved that B. papyrifera has good tolerance to Cd stress and is a pioneer tree species for soil and ecological environment restoration.

Improvement of alfalfa resistance against Cd stress through rhizobia and arbuscular mycorrhiza fungi co-inoculation in Cd-contaminated soil

2021 ◽  
Vol 277 ◽  
pp. 116758
Author(s):  
Xia Wang ◽  
Linchuan Fang ◽  
Jingzi Beiyuan ◽  
Yongxing Cui ◽  
Qi Peng ◽  
...  
Keyword(s):  
Arbuscular Mycorrhiza ◽  
Contaminated Soil ◽  
Cd Stress ◽  
Arbuscular Mycorrhiza Fungi

Cadmium Tolerance and Accumulation in Vitex negundo var. heterophylla in Pot Experiment

2011 ◽  
Vol 356-360 ◽  
pp. 287-290
Author(s):  
Yong Lan Tian ◽  
Hua Yong Zhang ◽  
Wei Guo ◽  
Lu Yi Zhang ◽  
Xue Jing Yu ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Root Diameter ◽  
Shoot Length ◽  
Pot Experiment ◽  
Cadmium Tolerance ◽  
Vitex Negundo ◽  
Growth Responses ◽  
Cd Stress ◽  
Cd Accumulation

The cadmium (Cd) stress to xylophyta Vitex negundo var. heterophylla including growth responses and Cd accumulation in plant was investigated in pot experiment with different Cd concentrations. The result indicated that the shoot length, shoot diameter and root diameter as well as the biomass of organs were obviously decreased when Cd was 50 mg/kg. 100 mg/kg Cd caused the chlorosis of the leaf. The accumulated ability of Cd in Vitex negundo var. heterophylla in turn was root > leaf > shoot. This plant presented efficient ability in removing the Cd from the contaminated soil when initial Cd in the soil was 20 mg/kg.

scholarly journals Antioxidant Systems Response, Mineral Element Uptake and Safe Utilization of Polygonatum Sibiricum in Cadmium-Contaminated Soil

2021 ◽  
Author(s):  
Yuchen Kang ◽  
Li Yang ◽  
Haibo Dai ◽  
Mengdi Xie ◽  
Yuhao Wang ◽  
...  
Keyword(s):  
Stress Responses ◽  
Contaminated Soil ◽  
Physiological Stress ◽  
Antioxidant Properties ◽  
Mineral Elements ◽  
Antioxidant Systems ◽  
Antioxidant Enzyme Activities ◽  
Mineral Element ◽  
Cd Stress ◽  
Element Uptake

Abstract Chinese herbal medicine is widely cultivated in southwest China where the soil cadmium (Cd) contamination of farmland is more serious than that in the whole of China. In this study, Polygonatum sibiricum were exposed to Cd at the concentrations of e− 1, e0, e2, and e4 mg·kg− 1 for up to 30,60, and 90 days and their physiological stress responses, Cd and mineral element uptake, antioxidant enzyme activities, and content changes of pharmaceutical ingredients (polysaccharides) were analyzed to decipher the feasibility of safety use in Cd contaminated soil. Results showed that the activity of antioxidant enzymes (SOD, POD, and CAT) of the aboveground part was enhanced in response to Cd stress after 90 d. Compared with the control, the underground part mobilizes non-enzymatic systems to facilitate the synthesis of polysaccharides (PCP1, PCP2) with antioxidant properties to cope with Cd stress. Mineral elements (P, K, Ca, Mg, Fe, Cu, and Zn) were significantly changed after 90 d of cultivation. In particular, the changes in iron and zinc contents were significantly correlated with the activities of SOD and POD. The soil Cd safety thresholds value for Polygonatum sibiricum is e0 mg·kg− 1, under which concentration the stimulation of Cd promotes polysaccharides synthesis and biomass growth.

scholarly journals Changes in Proteome and Protein Phosphorylation Reveal the Protective Roles of Exogenous Nitrogen in Alleviating Cadmium Toxicity in Poplar Plants

2019 ◽  
Vol 21 (1) ◽  
pp. 278 ◽  
Author(s):  
Jinliang Huang ◽  
Xiaolu Wu ◽  
Feifei Tian ◽  
Qi Chen ◽  
Pengrui Luo ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Cadmium Toxicity ◽  
Fold Change ◽  
P Value ◽  
Cd Stress ◽  
Fold Change Threshold ◽  
N Treatment ◽  
Change Threshold ◽  
Exogenous Nitrogen ◽  
Cadmium Contaminated Soil

Phytoremediation soil polluted by cadmium has drawn worldwide attention. However, how to improve the efficiency of plant remediation of cadmium contaminated soil remains unknown. Previous studies showed that nitrogen (N) significantly enhances cadmium uptake and accumulation in poplar plants. In order to explore the important role of nitrogen in plants’ responses to cadmium stress, this study investigates the poplar proteome and phosphoproteome difference between Cd stress and Cd + N treatment. In total, 6573 proteins were identified, and 5838 of them were quantified. With a fold-change threshold of > 1.3, and a p-value < 0.05, 375 and 108 proteins were up- and down-regulated by Cd stress when compared to the control, respectively. Compared to the Cd stress group, 42 and 89 proteins were up- and down-regulated by Cd + N treatment, respectively. Moreover, 522 and 127 proteins were up- and down-regulated by Cd + N treatment compared to the CK group. In addition, 1471 phosphosites in 721 proteins were identified. Based on a fold-change threshold of > 1.2, and a p-value < 0.05, the Cd stress up-regulated eight proteins containing eight phosphosites, and down-regulated 58 proteins containing 69 phosphosites, whereas N + Cd treatment up-regulated 86 proteins containing 95 phosphosites, and down-regulated 17 proteins containing 17 phosphosites, when compared to Cd stress alone. N + Cd treatment up-regulated 60 proteins containing 74 phosphosites and down-regulated 37 proteins containing 42 phosphosites, when compared to the control. Several putative responses to stress proteins, as well as transcriptional and translational regulation factors, were up-regulated by the addition of exogenous nitrogen following Cd stress. Especially, heat shock protein 70 (HSP70), 14-3-3 protein, peroxidase (POD), zinc finger protein (ZFP), ABC transporter protein, eukaryotic translation initiation factor (elF) and splicing factor 3 B subunit 1-like (SF3BI) were up-regulated by Cd + N treatment at both the proteome and the phosphoproteome levels. Combing the proteomic data and phosphoproteomics data, the mechanism by which exogenous nitrogen can alleviate cadmium toxicity in poplar plants was explained at the molecular level. The results of this study will establish the solid molecular foundation of the phytoremediation method to improve cadmium-contaminated soil.

scholarly journals Supplemental Effects of Biochar and Foliar Application of Ascorbic Acid on Physio-Biochemical Attributes of Barley (Hordeum vulgare L.) under Cadmium-Contaminated Soil

2021 ◽  
Vol 13 (16) ◽  
pp. 9128
Author(s):  
Samia Yaseen ◽  
Syeda Fasiha Amjad ◽  
Nida Mansoora ◽  
Shameem Kausar ◽  
Huma Shahid ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Hordeum Vulgare ◽  
Contaminated Soil ◽  
Foliar Application ◽  
Cadmium Concentration ◽  
Cd Stress ◽  
Hordeum Vulgare L ◽  
Chlorophyll Contents ◽  
Cd Contamination ◽  
Root And Shoot Length

Biochar, prepared from organic waste materials, can improve the quality of contaminated soil areas. Biochar can be used as an economic centerpiece over other available resources and can properly utilize large amounts of waste. Soil contaminated with cadmium (Cd) is a worldwide problem that poses potential agricultural and human health hazards. Moreover, Cd toxicity causes serious problems for sustainable food production, especially in food crops like barley. High cadmium concentration in soil is phytotoxic and decreases plant growth and ultimately yields. Biochar and ascorbic acid in ameliorating Cd stress are economically compatible and consistent approaches in agriculture. The present study aimed to evaluate biochar’s and foliar-applied ascorbic acid’s influence on some growth and biochemical characteristics of barley (Hordeum vulgare L.) to Cd stress. The soil was supplemented with biochar 2% w/w and 20 mg Cd kg−1. The foliar application of 30 mM ascorbic acid was done on plants. The results revealed that Cd stress decreased chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids. It also increased oxidative stress indicators, i.e., APX, COD, POD, flavonoids, anthocyanin, phenolics, and electrolyte leakage, in barley with Cd-contamination. A significant enhancement in root and shoot length, gas exchange attributes, and chlorophyll contents validated the effectiveness of Bio + Asa treatments over all other treatments under Cd contamination. In conclusion, the sole applications of biochar and Asa in Cd contamination are also effective, but Bio + Asa is a better amendment for Cd stress alleviation in barley plants.

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