Comparative metabolomic responses of low- and high-cadmium accumulating genotypes reveal the cadmium adaptive mechanism in Brassica napus

Mwamba, Theodore M.; Islam, Faisal; Ali, Basharat; Lwalaba, Jonas Lwalaba Wa; Gill, Rafaqat Ali; Zhang, F.; Farooq, Muhammad Ahsan; Ali, Sehrish; Ulhassan, Zaid; Huang, Qian; Zhou, Weijun; Wang, J.

doi:10.1016/j.chemosphere.2020.126308

Cited by 81 publications

(32 citation statements)

References 65 publications

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“…Besides, γ-glu-cys is utilized to synthesize GSH via the glutathione synthase pathway. The accumulation of γ-glu-cys is an important way for plant to protect itself under Cd stress [64]. Overall, seed priming with ZnO NPs treatment had a positive effect on the antioxidant enzymes of rice seedling under Cd stress.…”

Section: Discussionmentioning

confidence: 93%

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

Liang

et al. 2021

J Nanobiotechnol

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Background Cadmium (Cd) is amongst the most toxic heavy metals that severely affects crop growth, whereas application of nanoparticles (NPs) to negate the toxic effects of heavy metals could be an effective management approach. In the present study, the seeds of two fragrant rice varieties i.e., Yuxiangyouzhan and Xiangyaxiangzhan under normal and Cd stress conditions i.e., 0 and 100 mg L− 1 applied with four levels of ZnO NPs i.e., 0, 25, 50, and 100 mg L− 1. Results Seed priming with ZnO NPs had no significant effect on the seed germination (p > 0.05) however, it substantially improved the seedling growth and other related physiological attributes under the Cd stress. The mean fresh weight of the shoot, and whole seedling was increased by 16.92–27.88% and by 16.92–27.88% after ZnO NPs application. The root fresh weight, root-shoot length was also substantially improved under ZnO NPs treatment. Moreover, application of ZnO NPs induced modulations in physiological and biochemical attributes e.g., the superoxide dismutase (SOD) activity in root and shoot, the peroxidase (POD) activity and metallothionein contents in root were increased under low levels of ZnO NPs. The α-amylase and total amylase activity were improved by ZnO NPs application under Cd Stress. Besides, modulation in Zn concentration and ZnO NPs uptake in the seedling were detected. The metabolomic analysis indicated that various pathways such as alanine, aspartate and glutamate metabolism, phenylpropanoid biosynthesis, and taurine and hypotaurine metabolism were possibly important for rice response to ZnO NPs and Cd. Conclusion Overall, application of ZnO NPs substantially improved the early growth and related physio-biochemical attributes in rice. Our findings provide new insights regarding the effects of ZnO NPs on seed germination, and early growth of rice, and its potential applications in developing crop resilience against Cd contaminated soils.

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Section: Discussionmentioning

confidence: 93%

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

Liang

et al. 2021

J Nanobiotechnol

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“…The phenolic content is often considered to be closely related to plant tissues’ total antioxidant capacity [ 45 ]. Studies have shown that flavonoids are also one of the main chemical defence substances in plants and can reduce various forms of reactive oxygen species in plant cells [ 46 ].…”

Section: Discussionmentioning

confidence: 99%

Metabolome and transcriptome analysis reveals the molecular profiles underlying the ginseng response to rusty root symptoms

et al. 2021

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Background Ginseng rusty root symptoms (GRS) is one of the primary diseases of ginseng. This disease leads to a severe decline in the quality of ginseng. It has been shown that the occurrence of GRS is associated with soil environmental degradation, which may involve changes in soil microbiology and physicochemical properties. Results In this study, GRS and healthy ginseng (HG) samples were used as experimental materials for comparative analysis of transcriptome and metabolome. Compared with those in HG samples, 949 metabolites and 9451 genes were significantly changed at the metabolic and transcriptional levels in diseased samples. The diseased tissues’ metabolic patterns changed, and the accumulation of various organic acids, alkaloids, alcohols and phenols in diseased tissues increased significantly. There were significant differences in the expression of genes involved in plant hormone signal transduction, phenylpropanoid biosynthesis, the peroxidase pathway, and the plant-pathogen interaction pathway. Conclusion The current study involved a comparative metabolome and transcriptome analysis of GRS and HG samples. Based on the findings at the transcriptional and metabolic levels, a mechanism model of the ginseng response to GRS was established. Our results provide new insights into ginseng’s response to GRS, which will reveal the potential molecular mechanisms of this disease in ginseng.

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“…The decline in ascorbic acid content has been associated with cadmium toxicity in rice seedlings and pretreatment with AsA reduced the subsequent Cd-induced toxicity in this species (Chao et al, 2010). The sensitivity of the Brassica napus genotype ZD622 to Cd is associated, among other factors, with the decrease in ascorbate levels (Mwamba et al, 2020), demonstrating the important role played by this antioxidant in Cd tolerance.…”

Section: Cadmium Promotes Differential Effects On Oxidative Stress Anmentioning

confidence: 95%

Characterization of mechanisms involved in tolerance and accumulation of Cd in Biscutella auriculata L

Peco

Campos

Romero‐Puertas

et al. 2020

Ecotoxicology and Environmental Safety

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Biscutella auriculata L. is one of the rare species that is able to grow in a very contaminated mining area in Villamayor de Calatrava (Ciudad Real, Spain). In an effort to understand the mechanisms involved in the tolerance of this plant to high metal concentrations, we grew B. auriculata in the presence of 125 μM Cd(NO3)2 for 15 days and analysed different parameters associated with plant growth, nitric oxide and reactive oxygen species metabolism, metal uptake and translocation, photosynthesis rate and biothiol (glutathione and phytochelatins) content. Treatment with Cd led to growth inhibition in both the leaves and the roots, as well as a reduction of photosynthetic parameters, transpiration and stomatal conductance. The metal was mainly accumulated in the roots and in the vascular tissue, although most Cd was detected in areas surrounding their epidermal cells, while in the leaves the metal accumulated mainly in spongy mesophyll, stomata and trichrome. Based on the Cd bioaccumulation (5.93) and translocation (0.15) factors, this species denoted enrichment of the metal in the roots and its low translocation to the upper tissues. Biothiol analysis showed a Cd-dependent increase of reduced glutathione (GSH) as well as the phytochelatins (PC2 and PC3) in both roots and leaves. Cd-promoted oxidative damage occurred mainly in the leaves due to disturbances in enzymatic and nonenzymatic antioxidants, while the roots did not show significant damage as a result of induction of antioxidant defences. It can be concluded that B. auriculata is a new Cd-tolerant plant with an ability to activate efficient metal-sequestering mechanisms in the root surface and leaves and to induce PCs, as well as antioxidative defences in roots.

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Comparative metabolomic responses of low- and high-cadmium accumulating genotypes reveal the cadmium adaptive mechanism in Brassica napus

Cited by 81 publications

References 65 publications

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

Metabolome and transcriptome analysis reveals the molecular profiles underlying the ginseng response to rusty root symptoms

Characterization of mechanisms involved in tolerance and accumulation of Cd in Biscutella auriculata L

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