scholarly journals Role of Nramp transporter genes of Spirodela polyrhiza in cadmium accumulation

2021 ◽  
Vol 227 ◽  
pp. 112907
Author(s):  
Yan Chen ◽  
Gaojie Li ◽  
Jingjing Yang ◽  
Xuyao Zhao ◽  
Zuoliang Sun ◽  
...  
Keyword(s):  
Cadmium Accumulation ◽  
Spirodela Polyrhiza

Role of roots in cadmium accumulation of two water spinach cultivars: reciprocal grafting and histochemical experiments

2012 ◽  
Vol 366 (1-2) ◽  
pp. 425-432 ◽  
Author(s):  
Junliang Xin ◽  
Baifei Huang ◽  
Junzhi Yang ◽  
Zhongyi Yang ◽  
Jiangang Yuan ◽  
...  
Keyword(s):  
Cadmium Accumulation ◽  
Water Spinach

scholarly journals Reducing Cadmium Accumulation in Plants: Structure–Function Relations and Tissue-Specific Operation of Transporters in the Spotlight

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 223 ◽  
Author(s):  
Xin Huang ◽  
Songpo Duan ◽  
Qi Wu ◽  
Min Yu ◽  
Sergey Shabala
Keyword(s):  
Structure Function ◽  
Current Knowledge ◽  
Cadmium Accumulation ◽  
Major Focus ◽  
Phloem Tissue ◽  
Cd Uptake ◽  
Major Health ◽  
Cd Accumulation ◽  
Tissue Specific

Cadmium (Cd) is present in many soils and, when entering the food chain, represents a major health threat to humans. Reducing Cd accumulation in plants is complicated by the fact that most known Cd transporters also operate in the transport of essential nutrients such as Zn, Fe, Mn, or Cu. This work summarizes the current knowledge of mechanisms mediating Cd uptake, radial transport, and translocation within the plant. It is concluded that real progress in the field may be only achieved if the transport of Cd and the above beneficial micronutrients is uncoupled, and we discuss the possible ways of achieving this goal. Accordingly, we suggest that the major focus of research in the field should be on the structure–function relations of various transporter isoforms and the functional assessment of their tissue-specific operation. Of specific importance are two tissues. The first one is a xylem parenchyma in plant roots; a major “controller” of Cd loading into the xylem and its transport to the shoot. The second one is a phloem tissue that operates in the last step of a metal transport. Another promising and currently underexplored avenue is to understand the role of non-selective cation channels in Cd uptake and reveal mechanisms of their regulation.

Cadmium accumulation, distribution and metabolism in the gastropodLittorina littorea: the role of metal-binding proteins

1987 ◽  
Vol 67 (3) ◽  
pp. 585-601 ◽  
Author(s):  
W. J. Langston ◽  
Mingjiang Zhou
Keyword(s):  
Environmental Contamination ◽  
Metal Binding ◽  
Binding Proteins ◽  
Cadmium Accumulation ◽  
Littorina Littorea ◽  
Marine Molluscs ◽  
Frequent Use ◽  
Toxicity Potential ◽  
High Degree

Cadmium, and its compounds, has been placed on the blacklists of most international pollution conventions by virtue of its toxicity, potential for bioaccumulation and persistence (Taylor, 1983).The ability of many marine molluscs, and in particular gastropods, to accumulate Cd to a high degree in apparently unregulated fashion has led to their frequent use in monitoring programmes. Thus Cd levels in the winkle,Littorina littorea(L.) closely reflect gradients in environmental contamination (Bryanet al. 1983), demonstrating the excellent ‘indicator’ properties of this group.

scholarly journals Nanoselenium Transformation And Inhibition of Cadmium Accumulation By Regulating The Lignin Biosynthetic Pathway And Plant Hormone Signal Transduction In Pepper Plants

2021 ◽  
Author(s):  
Dong Li ◽  
Chunran Zhou ◽  
Jinling Ma ◽  
Yangliu Wu ◽  
Lu Kang ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Cell Walls ◽  
Biosynthetic Pathway ◽  
Lignin Biosynthesis ◽  
Cadmium Accumulation ◽  
Protective Mechanism ◽  
Plant Signal Transduction ◽  
Lignin Biosynthetic Pathway ◽  
Pepper Plants

Abstract Selenium (Se) can promote the growth and resistance of agricultural crops as fertilizers, while the role of nano-selenium (nano-Se) against Cd remains unclear in pepper plants (Capsicum annuum L.). Biofortification with nano-Se observably restored Cd stress by decreasing the level of Cd in plant tissues and boosting the accumulation in biomass. The Se compounds transformed by nano-Se were primarily in the form of SeMet and MeSeCys in pepper tissues. Differential metabolites and the genes of plant signal transduction and lignin biosynthesis were measured by employing transcriptomics and determining target metabolites. The number of lignin-related genes (PAL, CAD, 4CL, and COMT) and contents of metabolites (sinapyl alcohol, phenylalanine, p-coumaryl alcohol, caffeyl alcohol, and coniferaldehyde) were remarkably enhanced by treatment with Cd1Se0.2, thus, maintaining the integrity of cell walls in the roots. It also enhanced signal transduction by plant hormones and responsive resistance by inducing the biosynthesis of genes (BZR1, LOX3, and NCDE1) and metabolites (brassinolide, abscisic acid, and jasmonic acid) in the roots and leaves. In general, this study can enable a better understanding of the protective mechanism of nano-Se in improving the capacity of plants to resist environmental stress.

scholarly journals Azolla incorporation under flooding reduces grain cadmium accumulation by decreasing soil redox potential

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chen Liu ◽  
Bin Guo ◽  
Hua Li ◽  
Qinglin Fu ◽  
Ningyu Li ◽  
...  
Keyword(s):  
Redox Potential ◽  
Cadmium Accumulation ◽  
Soil Redox Potential ◽  
Cd Accumulation ◽  
Soil Redox ◽  
Rice Yields ◽  
Double Rice ◽  
Late Rice

AbstractCadmium (Cd) presents severe risks to human health and environments. The present study proposed a green option to reduce bioavailable Cd. Rice pot experiments were conducted under continuous flooding with three treatments (T1: intercropping azolla with rice; T2: incorporating azolla into soil before rice transplantation; CK: no azolla). The results showed that azolla incorporation reduced soluble Cd by 37% compared with the CK treatment, which may be explained by the decreased soil redox potential (Eh) (r = 0.867, P < 0.01). The higher relative abundance of Methylobacter observed in azolla incorporation treatment may account for dissolved organic carbon increase (r = 0.694; P < 0.05), and hence decreased the Cd availability for rice. Azolla incorporation increased the abundance of Nitrospira, indicating the potentially prominent role of nitrogen mineralization in increasing rice yields. Further, lower soluble Cd decreased the expression of OsNramp5, but increased OsHMA3 levels in rice roots, which decreased Cd accumulation in grains. Through these effects, azolla incorporation decreased Cd concentrations in rice grains by 80.3% and increased the production by 13.4%. The negligible amount of Cd absorbed by azolla would not increase the risk of long-term application. Thus, intercropping azolla with early rice and incorporating azolla into soil before late rice transplantation can contribute to safe production at large scales of double rice cultivation.

Sign in / Sign up

Export Citation Format

Share Document