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28 results for “inorganic nitrogen”
Data from: Tree species rather than type of mycorrhizal association drives inorganic and organic nitrogen acquisition in tree-tree interactions
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Data from: Widely naturalized species are not more promiscuous in the use of different nitrogen forms, but benefit more from inorganic nitrogen
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Figure 3 in Relative uptake of organic and inorganic nitrogen by common weed species
Figure 3. Whole-plant recovery of 15N by each species expressed as a percentage of the total 15N applied. Values are means ± 1 SE (n = 5). Within a nitrogen (N) treatment, bars sharing the same letter are not significantly different (Tukey honest significant difference [HSD] test, α = 0.05). See Table 1 for list of full species names.
Testing assumptions of nitrogen cycling between a temperate, model coral host and its facultative symbiont: symbiotic contributions to dissolved inorganic nitrogen assimilation
<p>Coral symbioses are predicated on the need for mutual nutrient acquisition and translocation between partners. Carbon translocation is well-studied in this classic mutualism, while nitrogen (N) has received comparatively less attention. Quantifying the mechanisms and dynamics of N assimilation is critical to understanding the functional ecology of coral organisms. Given the importance of symbiosis to the coral holobiont, it is important to determine what role photosynthetic symbionts play in N acquisition. We used the facultatively symbiotic temperate coral <em>Astrangia poculata</em> and <sup>15</sup>N labeling to test the effects of symbiotic state and trophic status on N acquisition. We tracked assimilation of 2 forms of isotopically labeled dissolved inorganic N (DIN: ammonium, <sup>15</sup>NH<sub>4</sub><sup>+</sup> and nitrate, <sup>15</sup>NO<sub>3</sub><sup>−</sup>) by fed and starved colonies of both symbiotic and aposymbiotic <em>A. poculata</em>. Coral holobiont tissue was subsequently analyzed for δ<sup>15</sup>N and changes in photosynthetic efficiency. Results suggest that corals acquired the most N from DIN via their symbiont <em>Breviolum psygmophilum</em> and that NH<sub>4</sub><sup>+</sup> is more readily assimilated than NO<sub>3</sub><sup>−</sup>. Photosynthetic efficiency increased with the addition of NH<sub>4</sub><sup>+</sup>, but only for fed, symbiotic treatments. NO<sub>3</sub><sup>−</sup> adversely affected photosynthetic efficiency among starved corals. Our results suggest that symbiosis is advantageous for DIN acquisition, that dysbiosis inhibits corals' mixotrophic strategy of nutrient acquisition, and that either feeding or symbiosis alone does not fully provide the energetic advantage of both. This study lends support to the emerging hypothesis that symbionts are mutualists in optimal conditions but shift to a parasitic paradigm when resources or energy are scarce.</p>
Testing assumptions of nitrogen cycling between a temperate, model coral host and its facultative symbiont: symbiotic contributions to dissolved inorganic nitrogen assimilation
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Root transcriptional profile of maize seedlings treated with protein hydolysate, free amino acids and inorganic nitrogen.
GEO Series GSE89535. Zea mays. 9 samples. Type: Expression profiling by array.
Chip-SIP analysis of Pacifica pier surface waters incubated with organic and inorganic nitrogen and carbon substrates
GEO Series GSE111361. Bacteria. 17 samples. Type: Other.
Comparison of root transcriptomes in Arabidopsis thaliana plants supplied with different forms of inorganic nitrogen
GEO Series GSE29589. Arabidopsis thaliana. 15 samples. Type: Expression profiling by array.
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