Past, present and future of organic nutrients

Paungfoo‐Lonhienne, Chanyarat; Visser, Jozef; Lonhienne, Thierry; Schmidt, Susanne

doi:10.1007/s11104-012-1357-6

Cited by 112 publications

(82 citation statements)

References 133 publications

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“…It is important to note that mineralization of organic N of the soil occurs at a variable rate as a result of the edaphic and climatic characteristics, usage and management practices, type of soil, and quality of the crop or organic residue (Aita et al, 2006;Lourenzi et al, 2013;Schirmann et al, 2013). New approaches in regard to organic N have characterized different fractions of this nutrient in the soil, such as recalcitrant organic N and labile organic N, which have an effect on the rate of mineralization Paungfoo-Lonhienne et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Organic Nitrogen in a Typic Hapludox Fertilized With Pig Slurry

Grohskopf

Cassol

Corrêa

et al. 2015

Rev. Bras. Ciênc. Solo

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The application of pig slurry may have a different effect on nitrogen dynamics in soil compared to mineral fertilization. Thus, the aim of this study was to determine the different forms of organic n in a latossolo Vermelho distroférrico (Typic Hapludox) and their relationship to n uptake by crops in response to 10 years of annual application of pig slurry and mineral fertilizer. The treatments were application rates of 0, 25, 50, 100, and 200 m 3 ha -1 of pig slurry, in addition to mineral fertilizer, organized in a randomized block design with four replications. The n contents were determined in the plant tissue and in the forms of total n and acid hydrolyzed fractions: ammonium-n, hexosamine-n, α-amino-n, amide-n, and unidentified-N. Annual application of pig slurry or mineral fertilizer increased the total-N content in the 0-10 cm depth layer. The main fractions of organic N in the soil were α-amino-N when pig slurry was applied and unidentified-N in the case of mineral fertilizers. Pig slurry increased the N fractions considered as labile: α-amino-N, ammonium-N, and amide-N. The increase in these labile organic n fractions in the soil through pig slurry application allows greater n uptake by the maize and oat crops in a no-tillage system.

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Section: Resultsmentioning

confidence: 99%

Organic Nitrogen in a Typic Hapludox Fertilized With Pig Slurry

Grohskopf

Cassol

Corrêa

et al. 2015

Rev. Bras. Ciênc. Solo

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“…The difficulties associated with studying rhizosphere processes, including chemical characterisation of nutrients and quantification of their fluxes, have limited progress in understanding the importance of organic N and P for plant nutrition. However, roots take up a variety of organic compounds (Näsholm et al 2009;Paungfoo-Lonhienne et al 2012). An important consideration for the discussion on mixotrophy is that irrespective of root specialisation, a significant proportion of the root surface is free of fungi or other microbes (Bais et al 2006).…”

Section: Root Specialisations: Mycorrhizal Fungi N 2 Fixing Procaryomentioning

confidence: 99%

“…In recent decades it has been 'rediscovered' that nitrate and ammonium are not the sole N sources for plants; early plant nutrition researchers considered a surprising variety of organic compounds as nutrient sources (reviewed by Paungfoo- Lonhienne et al 2012). Amino acids are present in soil, and plants use or even prefer amino acids over other N forms (Chapin et al 1993;Chapin 1995;Näsholm et al 1998;Schimel and Bennett 2004), and amino acid transporters catalysing the uptake of amino acids into roots have been identified (Hirner et al 2006;Lee et al 2007;Svennerstam et al 2007Svennerstam et al , 2011.…”

Section: Organic Nutrients As Sources Of Essential Nutrients For Plantsmentioning

confidence: 99%

“…Internalised lucifer yellow, an endocytosis marker, occurs in transition zone cells of the inner cortex of intact maize root apices indicating that large molecules are transported across cortex cells (Baluska et al 2004, who acknowledged that results from the use of lucifer yellow can be compromised by the occurrence of carrier-mediated movement of this tracer across plant membranes). That larger molecules enter roots via endocytosis has long been proposed as exogenously supplied macromolecules such as DNA were detected in roots (reviewed by Paungfoo-Lonhienne et al 2012). Sucrose and glucose enter cells by membrane transporters (Sauer 2007) and are also incorporated into intact walled plant cells via endocyctosis (Etxeberria et al 2005a(Etxeberria et al , 2005b.…”

Section: Possible Mechanisms Of the Uptake Of Large Organic Compoundsmentioning

confidence: 99%

“…Inorganic N is relatively mobile in soil, although orthophosphate has significant restrictions on its mobility, but has greater mobility than phytate or polyphosphate. The acquisition of inorganic ions and molecules by roots involves plasma membrane located transporters that catalyse selective uptake, and accumulation, of inorganic N and P. It is generally assumed that plants are net exporters of organic compounds into soil and importers of inorganic ions and molecules, but recently the role of organic compounds as plant nutrients is being re-evaluated (reviewed by Paungfoo-Lonhienne et al 2012).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The mixotrophic nature of photosynthetic plants

Schmidt¹,

Raven²,

Paungfoo‐Lonhienne³

2013

Functional Plant Biol.

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Abstract. Plants typically have photosynthetically competent green shoots. To complement resources derived from the atmospheric environment, plants also acquire essential elements from soil. Inorganic ions and molecules are generally considered to be the sources of soil-derived nutrients, and plants tested in this respect can grow with only inorganic nutrients and so can live as autotrophs. However, mycorrhizal symbionts are known to access nutrients from organic matter. Furthermore, specialist lineages of terrestrial photosynthetically competent plants are mixotrophic, including species that obtain organic nutrition from animal prey (carnivores), fungal partners (mycoheterotrophs) or plant hosts (hemi-parasites). Although mixotrophy is deemed the exception in terrestrial plants, it is a common mode of nutrition in aquatic algae. There is mounting evidence that non-specialist plants acquire organic compounds as sources of nutrients, taking up and metabolising a range of organic monomers, oligomers, polymers and even microbes as sources of nitrogen and phosphorus. Plasmamembrane located transporter proteins facilitate the uptake of low-molecular mass organic compounds, endo-and phagocytosis may enable the acquisition of larger compounds, although this has not been confirmed. Identifying the mechanisms involved in the acquisition of organic nutrients will provide understanding of the ecological significance of mixotrophy. Here, we discuss mixotrophy in the context of nitrogen and phosphorus nutrition drawing parallels between algae and plants.

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