Differences in arbuscular mycorrhizal colonisation influence cadmium uptake in plants

Rask, Klara Andrés; Johansen, Jesper Liengaard; Kjøller, Rasmus; Ekelund, Flemming

doi:10.1016/j.envexpbot.2019.02.022

Cited by 31 publications

(15 citation statements)

References 60 publications

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“…Consequently, less Cd is exported to shoots. In a study using six plant species differing in their degree of mycorrhizal colonization, barley plants with the highest root mycorrhizal colonization contained the lowest amount of Cd in shoots (Rask et al 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Mycorrhizas also have direct inhibitory effects on root uptake and root-to-shoot transport of Cd. There is greater accumulation and immobilization of Cd in mycorrhizal roots than in non-mycorrhizal roots, and mycorrhizas have a strong ability to phytostabilize Cd in colonized roots and reduce Cd transport from roots to the shoot (Joner et al 2000;Chen et al 2018;Rask et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Reduced root mycorrhizal colonization as affected by phosphorus fertilization is responsible for high cadmium accumulation in wheat

et al. 2021

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greenhouse conditions with and without soil sterilization. Phosphorus fertilizers with 0.09, 5, and 28 mg Cd kg −1 were applied at different rates with varied zinc (Zn) fertilization. Results In wheat, all three P fertilizers markedly increased shoot and grain Cd concentrations as P supply was increased, irrespective of the Cd concentration in the fertilizers. These increases were pronounced with soil sterilization or at low zinc supply. Adding mycorrhizal fungi to sterilized soil substantially decreased shoot Cd concentrations. We found a strong negative relationship in wheat between mycorrhizal colonization and shoot Cd concentration, for both high-and low-Cd fertilizers. In contrast to wheat, shoot Cd concentrations in canola showed virtually no response to P supply or soil sterilization. High Zn application also reduced plant Cd concentrations, especially at high P rates. Conclusion Our findings demonstrate the critical importance of mycorrhizal colonization in reducing Cd accumulation in wheat, and suggest that factors suppressing root mycorrhizal activity including P fertilization, will increase Cd uptake in mycorrhizal plants.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reduced root mycorrhizal colonization as affected by phosphorus fertilization is responsible for high cadmium accumulation in wheat

et al. 2021

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“…Abiotic stresses are widespread in terrestrial ecosystems and are becoming increasingly severe because of dramatic changes in the global climate, environmental pollution, and excessive human activities during the past several decades. In agricultural ecosystems, numerous studies have highlighted that AM fungi are capable of improving the tolerance of their host plants to drought ( Grümberg et al, 2015 ; Li et al, 2019b ), salinity ( Augé et al, 2014 ; Chandrasekaran et al, 2019 ), heavy metals ( Wu et al, 2018 ; Zhang et al, 2018 , 2019 ; Rask et al, 2019 ), low nutrient availability ( Tanaka and Yano, 2005 ; Garcia and Zimmermann, 2014 ; Koegel et al, 2015 ; Chu et al, 2020 ), extreme temperature (heat and cold; Zhu et al, 2011 ; Chen et al, 2013 ; Cabral et al, 2016 ; Mathur et al, 2018 ), acidic soils (low pH; Huang et al, 2017a ; Wang et al, 2017 ; Feng et al, 2020 ), aluminum (Al) toxicity ( Seguela et al, 2016 ; Aguilera et al, 2018 ), and pollutants (As and polycyclic aromatic hydrocarbons; Aranda et al, 2013 ; Calonne et al, 2014 ) to varying degrees. The mechanisms underlying the improved tolerance afforded by AM fungi involve increased nutrient levels, optimized water balance, enhanced photosynthesis, and increased reactive oxygen species (ROS) scavenging activity in plants.…”

Section: Introductionmentioning

confidence: 99%

Responses of Arbuscular Mycorrhizal Symbiosis to Abiotic Stress: A Lipid-Centric Perspective

2020

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Arbuscular mycorrhizal (AM) fungi are one of the most important soil microbial resources that help host plants cope with various abiotic stresses. Although a tremendous number of studies have revealed the responses of AM fungi to abiotic stress and their beneficial effects transferred to host plants, little work has focused on the role of lipid metabolism in AM fungi under abiotic stress conditions. AM fungi contain a large amount of lipids in their biomass, including phospholipids (PLs) in their hyphal membranes and neutral lipids (NLs) in their storage structures (e.g., vesicles and spores). Recently, lipid transfer from plants to AM fungi has been suggested to be indispensable for the establishment of AM symbiosis, and extraradical hyphae are capable of directly taking up lipids from the environment. This experimental evidence highlights the importance of lipids in AM symbiosis. Moreover, abiotic stress reduces lipid transfer to AM fungi and promotes arbuscule collapse as well as the hydrolysis and conversion of PLs to NLs in collapsed arbuscules. Overall, this knowledge encourages us to rethink the responses of AM symbiosis to abiotic stress from a lipid-centric perspective. The present review provides current and comprehensive knowledge on lipid metabolism in AM fungi, especially in response to various abiotic stresses. A regulatory role of abscisic acid (ABA), which is considered a “stress hormone,” in lipid metabolism and in the resulting consequences is also proposed.

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“…MD varies among plant species, and plants with coarse root systems, such as pigeonpea in our study, profit more from association with AM fungi. As fungal symbiont is reliant on plant photosynthates, MC is indirectly affected by the detrimental effects of metals on shoot development (Rask, Johansen, Kjøller, & Ekelund, 2019). Moreover, decrease in AM fitness with increased metal concentrations might be related to reduce root growth observed in our study.…”

Section: Discussionmentioning

confidence: 56%

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2021

International Journal of Sustainable Agricultural Research

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Differences in arbuscular mycorrhizal colonisation influence cadmium uptake in plants

Cited by 31 publications

References 60 publications

Reduced root mycorrhizal colonization as affected by phosphorus fertilization is responsible for high cadmium accumulation in wheat

Reduced root mycorrhizal colonization as affected by phosphorus fertilization is responsible for high cadmium accumulation in wheat

Responses of Arbuscular Mycorrhizal Symbiosis to Abiotic Stress: A Lipid-Centric Perspective

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