Exogenous silicon alleviates cadmium toxicity in rice seedlings in relation to Cd distribution and ultrastructure changes

Guo, Lei; Chen, Aiting; He, Na; Yang, Dan; Liu, Mingda

doi:10.1007/s11368-017-1902-2

Cited by 55 publications

(23 citation statements)

References 45 publications

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“…The reduction of chloroplast starch grains suggests a more efficient translocation of photosynthesized carbohydrates from chloroplasts to the rest of the cell and/or to the phloem. Various stresses, such as high temperature [111], salt stress and gamma rays [112], or heavy metal stress [113], were reported to generate large starch grains in the chloroplasts, due to the disruption of the photosynthesized carbohydrates translocation.…”

Section: Discussionmentioning

confidence: 99%

Effects of Foliar Treatment with a Trichoderma Plant Biostimulant Consortium on Passiflora caerulea L. Yield and Quality

et al. 2020

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The influence of spore concentration on the ability of a Trichoderma consortium to colonize the Passiflora caerulea phyllosphere was evaluated by determining the effects of foliar treatments with two spore concentrations, in two repeated treatments, on the morphological, physiological, and ultrastructural characteristics, and on the yield and quality of P. caerulea. The studied crop quality features were related to its nutraceutical use: the accumulation of polyphenols and flavonoids, antioxidant activity, and effects on mouse fibroblast L929 cells. The Trichoderma consortium consisted of two strains, T. asperellum T36b and T. harzianum Td50b, and the concentrations used were 106 colony forming units (cfu)/mL and 108 cfu/mL. As a reference treatment, a commercial product that was based on herbs and algal extracts was used. As compared to the negative control, the treatment with the Trichoderma consortium at 108 cfu/mL concentration determines the accumulation of higher level of polyphenols and flavonoids and increased antioxidant activity. This enhancement of P. caerulea quality characteristics after treatment with the higher concentration of Trichoderma consortium was associated with larger leaves, increased number and size of chloroplasts, improved plant physiology characteristics, and an increased yield. The treatment with high concentration of Trichoderma consortium spores promotes phyllosphere colonization and benefits both crop yield and quality.

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Section: Discussionmentioning

confidence: 99%

Effects of Foliar Treatment with a Trichoderma Plant Biostimulant Consortium on Passiflora caerulea L. Yield and Quality

et al. 2020

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“…Mittelheuser and Van Steveninck [ 50 ] found that, when the chloroplast membrane structure was well developed, osmium particles were absent or rarely present. In addition, Guo et al [ 51 ] found that Si application was helpful for the recovery of chloroplast appearance and structure of rice seedlings under Cd stress. The quantities and sizes of starch grains and osmiophilic granules in the cells were radically reduced by Si [ 51 ].…”

Section: Discussionmentioning

confidence: 99%

Silicon Enhances Plant Resistance of Rice against Submergence Stress

Pan

Zhang

et al. 2021

Plants

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Flooding is an important natural disaster limiting rice production. Silicon (Si) has been shown to have an important role in alleviating varied environmental stress. However, very few studies have investigated the effects and mechanisms of Si in alleviating flood stress in rice. In the present study, wild type rice (cv. Oochikara, WT) and Si-defective mutant (lsi1) were chosen to examine the impacts of Si application on plant growth, photosynthesis, cell structure, and antioxidant enzyme activity of rice exposed to submergence stress at tillering stage. Our results showed that Si application improved root morphological traits, and increased Si uptake and plant biomass of WT under submergence stress, but non-significantly influenced lsi1 mutant. Under submergence stress, leaf photosynthesis of WT was significantly inhibited, and Si application had no significant effects on photosynthetic rate, transpiration rate, stomatal conductance, and intercellular carbon dioxide concentration for both of WT and lsi1 mutant, but the photochemical quenching of WT was increased and the integrity of cell structure was improved. In addition, Si application significantly reduced malondialdehyde concentration and increased the activity of peroxidase and catalase in WT leaves under submergence stress. These results suggested that Si could increase rice plant resistance against submergence stress by improving root morphological traits and chloroplast ultrastructure and enhancing antioxidant defense.

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“…The toxic effect of Cd on plants is reflected in the inhibition of the elongation and growth of plant root tips as well as the reduction of root biomass (Guo, Chen, He, Yang, & Liu, 2018; Ronzan et al., 2019). This is consistent with our results of the reduction of root biomass.…”

Section: Discussionmentioning

confidence: 99%

“…Chloroplasts are the main sites for photosynthesis in plants (Acosta‐Motos et al., 2017), and it is important to maintain the normal function of chloroplasts for the growth and development of plants (Zhao et al., 2019). Even under low concentration stress, Cd affects the chloroplasts of plants by increasing reactive oxygen species (Alves, Rossatto, Rossi, Martinelli, & Gratão, 2020; Guo et al., 2018). Dong, Chen, Liu, & Wan (2019) found that there is no obvious change in chloroplast morphology under low concentrations of heavy metal stress but that the chloroplast morphology changes significantly under high concentration of heavy metal stress, which was consistent with our research.…”

Section: Discussionmentioning

confidence: 99%

Effects of cutting frequency of tall fescue on cadmium form in soil and cadmium enrichment in the plant

Yang

Xue

et al. 2020

Agronomy Journal

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Cutting is a common practice for turfgrass culture and maintenance, and it may affect cadmium (Cd) uptake and enrichment due to the removal and regrowth of aboveground parts. The objective of this study was to determine how cutting frequency affects Cd form in the soil and its enrichment and distribution in clippings, stubble and roots. In this study, 'K-31' tall fescue (Festuca elata L.) plants were grown in soils containing different amounts of Cd (0, 5, 25 and 50 mg kg −1) and cut at three different frequencies (no cutting, one cutting, two cuttings and five cuttings in two weeks). The cutting treatment caused a significant decrease in the soil pH, and it promoted Cd absorption by roots and Cd transfer to stubble. Increasing the cutting frequency increased acid-soluble and reducible Cd content in soil, and the Cd content in the stubble and roots increased significantly and peaked at five cuttings. Cutting treatment exacerbated changes in plant ultrastructure under Cd stress as the chloroplasts of clippings swelled and the number of plastoglobuli in chloroplasts increased. Our study demonstrated that cutting frequency affects the conversion of Cd forms in the soil, promotes Cd absorption in roots, promotes Cd transport to stubble and exacerbates Cd stress on plants.

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Exogenous silicon alleviates cadmium toxicity in rice seedlings in relation to Cd distribution and ultrastructure changes

Cited by 55 publications

References 45 publications

Effects of Foliar Treatment with a Trichoderma Plant Biostimulant Consortium on Passiflora caerulea L. Yield and Quality

Effects of Foliar Treatment with a Trichoderma Plant Biostimulant Consortium on Passiflora caerulea L. Yield and Quality

Silicon Enhances Plant Resistance of Rice against Submergence Stress

Effects of cutting frequency of tall fescue on cadmium form in soil and cadmium enrichment in the plant

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