Assimilation of Nitrogen Dioxide in Selected Plant Taxa

Takahashi, Misa; Kondo, Komei; Morikawa, Hiromichi

doi:10.1002/abio.200390031

Cited by 20 publications

(8 citation statements)

References 11 publications

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“…Several authors have demonstrated the ability of plants to take up atmospheric NO 2 and incorporate it into different nitrogen pools within the plant [ 172 , 173 , 174 ], suggesting the possibility for the use of NO 2 as an alternative fertilizer and in turn the use of plants for air pollution control [ 175 ]. Removal of atmospheric NO 2 by plants occurs via adsorption to the leaf (and root) surface and stomatal uptake to the apoplast [ 176 ].…”

Section: Inorganic Air Pollutants (Iap)mentioning

confidence: 99%

The Role of Plant–Microbe Interactions and Their Exploitation for Phytoremediation of Air Pollutants

Weyens

Thijs

Popek

et al. 2015

IJMS

150

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Since air pollution has been linked to a plethora of human health problems, strategies to improve air quality are indispensable. Despite the complexity in composition of air pollution, phytoremediation was shown to be effective in cleaning air. Plants are known to scavenge significant amounts of air pollutants on their aboveground plant parts. Leaf fall and runoff lead to transfer of (part of) the adsorbed pollutants to the soil and rhizosphere below. After uptake in the roots and leaves, plants can metabolize, sequestrate and/or excrete air pollutants. In addition, plant-associated microorganisms play an important role by degrading, detoxifying or sequestrating the pollutants and by promoting plant growth. In this review, an overview of the available knowledge about the role and potential of plant–microbe interactions to improve indoor and outdoor air quality is provided. Most importantly, common air pollutants (particulate matter, volatile organic compounds and inorganic air pollutants) and their toxicity are described. For each of these pollutant types, a concise overview of the specific contributions of the plant and its microbiome is presented. To conclude, the state of the art and its related future challenges are presented.

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Section: Inorganic Air Pollutants (Iap)mentioning

confidence: 99%

The Role of Plant–Microbe Interactions and Their Exploitation for Phytoremediation of Air Pollutants

Weyens

Thijs

Popek

et al. 2015

IJMS

150

View full text Add to dashboard Cite

show abstract

“…Reductions in particulate matter, ozone, NO x , and SO x occur while plants are actively growing and in-leaf. Individual plant species also exhibit vast differences in their ability to uptake pollutants (Morikawa et al, 1998;Takahasi et al, 2003). Morikawa et al (1998) tested 217 species including Kalanchoe blossfeldiana, a succulent in the Crassulaceae family, for their potential to remove NO 2 .…”

Section: Air Pollutionmentioning

confidence: 99%

Green roofs as a means of pollution abatement

Rowe

2011

Environmental Pollution

501

226

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Green roofs involve growing vegetation on rooftops and are one tool that can help mitigate the negative effects of pollution. This review encompasses published research to date on how green roofs can help mitigate pollution, how green roof materials influence the magnitude of these benefits, and suggests future research directions. The discussion concentrates on how green roofs influence air pollution, carbon dioxide emissions, carbon sequestration, longevity of roofing membranes that result in fewer roofing materials in landfills, water quality of stormwater runoff, and noise pollution. Suggestions for future directions for research include plant selection, development of improved growing substrates, urban rooftop agriculture, water quality of runoff, supplemental irrigation, the use of grey water, air pollution, carbon sequestration, effects on human health, combining green roofs with complementary related technologies, and economics and policy issues.

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“…The century-old Kjeldahl method is still the sole method available for the analysis of organic nitrogen in biological systems (Bradstreet 1965). In our attempt to study the mechanism of nitrogen dioxide (NO 2 ) metabolism in the plant-mediated decontamination of this major air pollutant (Kawamura et al 1996;Morikawa et al 1998aMorikawa et al , 1998bGoshima et al 1999;Takahashi et al 2001Takahashi et al , 2003, we unexpectedly discovered that about one-third of the total nitrogen derived from NO 2 taken up in the leaves of Arabidopsis thaliana was converted to neither inorganic nor Kjeldahl nitrogen, but instead to an as yet unknown nitrogen. We hereafter designate this nitrogen unidentified nitrogen (UN).…”

Section: Introductionmentioning

confidence: 97%

Formation of unidentified nitrogen in plants: an implication for a novel nitrogen metabolism

Morikawa

Takahashi

Sakamoto

et al. 2004

Planta

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Plants take up inorganic nitrogen and store it unchanged or convert it to organic forms. The nitrogen in such organic compounds is stoichiometrically recoverable by the Kjeldahl method. The sum of inorganic nitrogen and Kjeldahl nitrogen has long been known to equal the total nitrogen in plants. However, in our attempt to study the mechanism of nitrogen dioxide (NO(2)) metabolism, we unexpectedly discovered that about one-third of the total nitrogen derived from (15)N-labeled NO(2) taken up by Arabidopsis thaliana (L.) Heynh. plants was converted to neither inorganic nor Kjeldahl nitrogen, but instead to an as yet unknown nitrogen compound(s). We here refer to this nitrogen as unidentified nitrogen ( UN). The generality of the formation of UN across species, nitrogen sources and cultivation environments for plants has been shown as follows. Firstly, all of the other 11 plant species studied were found to form the UN in response to fumigation with (15)NO(2). Secondly, tobacco ( Nicotiana tabacum L.) plants fed with (15)N-nitrate appeared to form the UN. And lastly, the leaves of naturally fed vegetables, grass and roadside trees were found to possess the UN. In addition, the UN appeared to comprise a substantial proportion of total nitrogen in these plant species. Collectively, all of our present findings imply that there is a novel nitrogen mechanism for the formation of UN in plants. Based on the analyses of the exhaust gas and residue fractions of the Kjeldahl digestion of a plant sample containing the UN, probable candidates for compounds that bear the UN were deduced to be those containing the heat-labile nitrogen-oxygen functions and those recalcitrant to Kjeldahl digestion, including organic nitro and nitroso compounds. We propose UN-bearing compounds may provide a chemical basis for the mechanism of the reactive nitrogen species (RNS), and thus that cross-talk may occur between UN and RNS metabolisms in plants. A mechanism for the formation of UN-bearing compounds, in which RNS are involved as intermediates, is proposed. The important broad impact of this novel nitrogen metabolism, not only on the general physiology of plants, but also on plant substances as human and animal food, and on plants as an integral part of the global environment, is discussed.

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Assimilation of Nitrogen Dioxide in Selected Plant Taxa

Cited by 20 publications

References 11 publications

The Role of Plant–Microbe Interactions and Their Exploitation for Phytoremediation of Air Pollutants

The Role of Plant–Microbe Interactions and Their Exploitation for Phytoremediation of Air Pollutants

Green roofs as a means of pollution abatement

Formation of unidentified nitrogen in plants: an implication for a novel nitrogen metabolism

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