Growth response and nitrogen use physiology of Fraser fir (Abies fraseri), red pine (Pinus resinosa), and hybrid poplar under amino acid nutrition

Wilson, Alexa R.; Nzokou, Pascal; Güney, Deniz; Kulaç, Şemsettin

doi:10.1007/s11056-012-9317-9

Cited by 24 publications

(17 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the first factor, the fraction N taken up, is largely controlled by soil processes, such as competition with microbes (Wilson et al . ), beyond the scope of our model it is also influenced by root growth. Our analysis shows that root biomass fraction is always higher if plants are growing on oN than on iN (Fig.…”

Section: Discussionmentioning

confidence: 96%

The carbon bonus of organic nitrogen enhances nitrogen use efficiency of plants

Franklin

Cambuí

Gruffman

et al. 2016

Plant Cell & Environment

View full text Add to dashboard Cite

The importance of organic nitrogen (N) for plant nutrition and productivity is increasingly being recognized. Here we show that it is not only the availability in the soil that matters, but also the effects on plant growth. The chemical form of N taken up, whether inorganic (such as nitrate) or organic (such as amino acids), may significantly influence plant shoot and root growth, and nitrogen use efficiency (NUE). We analysed these effects by synthesizing results from multiple laboratory experiments on small seedlings (Arabidopsis, poplar, pine and spruce) based on a tractable plant growth model. A key point is that the carbon cost of assimilating organic N into proteins is lower than that of inorganic N, mainly because of its carbon content. This carbon bonus makes it more beneficial for plants to take up organic than inorganic N, even when its availability to the roots is much lower – up to 70% lower for Arabidopsis seedlings. At equal growth rate, root:shoot ratio was up to three times higher and nitrogen productivity up to 20% higher for organic than inorganic N, which both are factors that may contribute to higher NUE in crop production.

show abstract

Section: Discussionmentioning

confidence: 96%

The carbon bonus of organic nitrogen enhances nitrogen use efficiency of plants

Franklin

Cambuí

Gruffman

et al. 2016

Plant Cell & Environment

View full text Add to dashboard Cite

show abstract

“…Picea abies and Pinus sylvestris seedlings, with an ability to uptake intact amino acids, grow as well as, or better, when they are supplied with amino acids compared to seedlings with access to inorganic N sources (Öhlund and Näsholm, 2001; Gruffman et al, 2012). Conversely, a field study with Abies fraseri , Pinus resinosa , and Populus nigra × Populus maximowiczii found that seedling growth and foliar N response resulting after an amino acid supply was similar to inorganic N applications only when the organic form was applied at rates two or three times higher than that of the inorganic form (Wilson et al, 2013). The N form provided in the growth substrate affects not only plant growth but also plant biomass allocation.…”

Section: Introductionmentioning

confidence: 99%

“…To the best of our knowledge, this is the first study to examine the effects of supplying organic N to seedlings and subsequent rhizobia nodule development and function. Arginine was chosen as our model amino acid partly because it had been used in other studies (Öhlund and Näsholm, 2001; Öhlund and Näsholm, 2002; Persson et al, 2003; Öhlund and Näsholm, 2004; Gruffman et al, 2013; Wilson et al, 2013) and partly because of its chemical properties. Arginine is an N-rich molecule containing four N atoms, which collectively contribute 32% of its molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Organic or Inorganic Nitrogen and Rhizobia Inoculation Provide Synergistic Growth Response of a Leguminous Forb and Tree

2019

View full text Add to dashboard Cite

Our objective was to better understand how organic and inorganic nitrogen (N) forms supplied to a tree, Robinia pseudoacacia, and a perennial forb, Lupinus latifolius, affected plant growth and performance of their symbiotic, N-fixing rhizobia. In one experiment, we tested five sources of N [none; three inorganic forms (ammonium, nitrate, ammonium-nitrate); and an organic form (arginine)] in combination with or without rhizobia inoculation. We measured seedling morphology, allometry, nodule biomass, and N status. A second experiment explored combinations of supplied 15N and inoculation to examine if inorganic or organic N was deleterious to nodule N-fixation. Plant growth was similar among N forms. A positive response of nodule biomass to N was greater in Robinia than Lupinus. For Robinia, inorganic ammonium promoted more nodule biomass than organic arginine. N-fixation was concurrent with robust supply of either inorganic or organic N, and N supply and inoculation significantly interacted to enhance growth of Robinia. For Lupinus, the main effects of inoculation and N supply increased growth but no interaction was observed. Our results indicate that these important restoration species for forest ecosystems respond well to organic or inorganic N forms (or various forms of inorganic N), suggest that the nodulation response may depend on plant species, and show that, in terms of plant growth, N supply and nodulation can be synergistic.

show abstract

“…Strong interactions between genotype and nutrient availability have been observed among families of Pinus taeda (Crawford et al 1991) and P. radiata (Hawkins et al 2010), sometimes leading to differences in leaf nutrient content within sites (Burdon 1976). There are very few studies that have reported variation in growth rates of conifers growing in organic and inorganic N forms, and generally the results were inconclusive (Gruffman et al 2012;Wilson et al 2013). Nevertheless, fertilisation with organic N is generally associated with differences in biomass allocation, mainly characterised by greater root allocation (root:shoot) compared to inorganic fertilisers (NO3 -) (Cambui et al 2011;Franklin et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Field-scale variability in site conditions explain phenotypic plasticity in response to nitrogen source in Pinus radiata D. Don

et al. 2019

View full text Add to dashboard Cite

Aims. Productivity of forest ecosystems is constrained by site resource availability and utilisation at an individual tree level. A better understanding of nitrogen (N) nutrition addition to forest ecosystems is critical for maintaining optimal plantation productivity, given the influence of an environment gradient, genetics, and their interactions. Methods. We studied the aboveground growth response in a plantation setting of ten commercial P. radiata genotypes to N-fertilisation using three different N sources, and also assessed the effect of on-site environmental factors on this response. We compared, on equimolar basis, the effect of N-fertilisation with inorganic N (NH4NO3), organic N (L-arginine), and the two N sources combined (L-arginine:NO3-) to that of unfertilised trees on tree height, diameter, descriptors of microsite variability, and climate / seasonal information. After 2.5 years of fertilisation, genotype-specific variation in aboveground growth response to N sources were measured, and these were significantly influenced by field-scale heterogeneity. Results. Across P. radiata genotypes, trees treated with inorganic N forms showed suppressed growth compared to unfertilised trees, while trees fertilised with organic N (either alone or in combination with inorganic N) were not significantly different than the untreated controls. We provide evidence of 2 significant interactions between N source and genotype, N source and cover as well as genotype and microsite variability affecting temporal trends in tree volume. Conclusions. We conclude that an understanding of field-scale variability in soil properties and associated environmental variables is essential for understanding genotype performance as they are crucial determinants of intraspecific variation in response to N-fertilisation. INTRODUCTION Given the longevity of sessile species, phenotypic plasticity provides an opportuntity to sense, change, and adapt their growth and physiological responses to cope with changes in environmental conditions (Bradshaw 1965; Corcuera et al. 2010). An ongoing challenge is to clarify which biological traits are manifested as genotypic variation from evolutionary and breeding history (G), phenotypic response to environmental variability (E) or combinations of both (G × E). Abundant evidence supports the hypotehsis that plant species and population responses differ across different environments (e.g. Schlichting and Levin 1984; Valladares et al. 2000). However, genotype-specific variation can be exhibited when grown in comparable conditions, affecting adaptive capacity and, consequently, tree performance (Souza et al. 2017). The flexibility and adaptability of tree genotype requires special attention, not only to understand the complexity of traits in breeding programmes, but also for the greater ecological impact that the increasing inter-seasonal climate changes may have in long-lived organisms. Pinus radiata D. Don (alt. Monterey pine) is the most common introduced softwood plantation species growing in temperat...

show abstract

Growth response and nitrogen use physiology of Fraser fir (Abies fraseri), red pine (Pinus resinosa), and hybrid poplar under amino acid nutrition

Cited by 24 publications

References 28 publications

The carbon bonus of organic nitrogen enhances nitrogen use efficiency of plants

The carbon bonus of organic nitrogen enhances nitrogen use efficiency of plants

Organic or Inorganic Nitrogen and Rhizobia Inoculation Provide Synergistic Growth Response of a Leguminous Forb and Tree

Field-scale variability in site conditions explain phenotypic plasticity in response to nitrogen source in Pinus radiata D. Don

Contact Info

Product

Resources

About