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| DOI: | 10.1104/pp.113.219311 |
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| Web URL(s): | http://www.plantphysiol.org/content/162/4/2095.full
Last checked: 01/29/2016
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http://www.plantphysiol.org/content/162/4/2095.full.pdf
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| Publication Type:
| Refereed |
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| Author(s): | Lehmeier, Christoph Andreas;
Wild, Melanie;
Schnyder, Hans |
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| Author Affiliation: | Lehrstuhl für Grünlandlehre, Department für Pflanzenwissenschaften, Technische Universität München, Freising-Weihenstephan, Germany |
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| Title: | Nitrogen stress affects the turnover and size of nitrogen pools supplying leaf growth in a grass |
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| Section: | Ecophysiology and sustainability
Other records with the "Ecophysiology and sustainability" Section
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| Source: | Plant Physiology. Vol. 162, No. 4, August 2013, p. 2095-2105. |
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| Publishing Information: | Rockville, MD: American Society of Plant Biologists |
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| # of Pages: | 11 |
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| Related Web URL: | http://www.plantphysiol.org/content/162/4/2095.abstract
Last checked: 01/29/2016
Notes: Abstract only
http://www.plantphysiol.org/content/162/4/2095/suppl/DC1
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Notes: Guide page to supplemental material
http://www.plantphysiol.org/powerpoint/162/4/2095
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| Keywords: | TIC Keywords: Growth factors; Lolium perenne; Nitrogen availability; Nitrogen fertilizers; Nutrient management; Stress physiology
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| Abstract/Contents: | "The effect of nitrogen (N) stress on the pool system supplying currently assimilated and (re)mobilized N for leaf growth of a grass was explored by dynamic 15N labeling, assessment of total and labeled N import into leaf growth zones, and compartmental analysis of the label import data. Perennial ryegrass (Lolium perenne) plants, grown with low or high levels of N fertilization, were labeled with 15NO3-/14NO3- from 2 h to more than 20 d. In both treatments, the tracer time course in N imported into the growth zones fitted a two-pool model (r2 > 0.99). This consisted of a 'substrate pool,' which received N from current uptake and supplied the growth zone, and a recycling/mobilizing 'store,' which exchanged with the substrate pool. N deficiency halved the leaf elongation rate, decreased N import into the growth zone, lengthened the delay between tracer uptake and its arrival in the growth zone (2.2 h versus 0.9 h), slowed the turnover of the substrate pool (half-life of 3.2 h versus 0.6 h), and increased its size (12.4 μg versus 5.9 μg). The store contained the equivalent of approximately 10 times (low N) and approximately five times (high N) the total daily N import into the growth zone. Its turnover agreed with that of protein turnover. Remarkably, the relative contribution of mobilization to leaf growth was large and similar (approximately 45%) in both treatments. We conclude that turnover and size of the substrate pool are related to the sink strength of the growth zone, whereas the contribution of the store is influenced by partitioning between sinks." |
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| Language: | English |
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| References: | 86 |
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| Note: | Equations
Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Lehmeier, C. A., M. Wild, and H. Schnyder. 2013. Nitrogen stress affects the turnover and size of nitrogen pools supplying leaf growth in a grass. Plant Physiol. 162(4):p. 2095-2105. |
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| DOI: 10.1104/pp.113.219311 |
| Web URL(s):
http://www.plantphysiol.org/content/162/4/2095.full
Last checked: 01/29/2016
Access conditions: Item is within a limited-access website
http://www.plantphysiol.org/content/162/4/2095.full.pdf
Last checked: 01/29/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2215281a |
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