| |
Web URL(s): | https://academic.oup.com/aob/article/92/5/679/241191/ Last checked: 03/01/2017 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Lötscher, Markus;
Stroh, Katharina;
Schnyder, Hans |
Author Affiliation: | Lehrstuhl für Grünlandlehre, Technische Universität München, Freising, Germany |
Title: | Vertical leaf nitrogen distribution in relation to nitrogen status in grassland plants |
Section: | Original articles Other records with the "Original articles" Section
|
Source: | Annals of Botany. Vol. 92, No. 5, November 2003, p. 679-688. |
Publishing Information: | London, Oxford University Press |
# of Pages: | 10 |
Keywords: | TIC Keywords: Nitrogen; Leaves; Distribution; Grasslands; Photosynthesis; Nutrient availability; Seeding; Density; Medicago sativa; Dactylis glomerata; Taraxacum officinale
|
Abstract/Contents: | "Vertical gradients of leaf nitrogen (N) per unit leaf area (NLA) are viewed as plastic responses that optimize N utilization with respect to carbon assimilation. However, it has been shown that plant species, sowing density and N availability affect the steepness of the NLA gradient relative to the photon flux density (PFD) gradient. This paper tests the hypothesis that such variation is related to the N status of the plant. The N status was analysed using the concept of the critical N concentration (Ncrit) in which shoot N per unit dry mass (NSM) decreases with shoot mass, and a negative deviation of actual NSM from Ncrit indicates N shortage in the plant. The hypothesis was tested with contrasting grassland species Medicago sativa, Dactylis glomerata and Taraxacum officinale by varying PFD and N availability, plant density and hierarchial positions of individuals within stands. Combinations of all treatments showed a general negative correlation between the N allocation coefficient (i.e. the slope of the NLA-PFD relationship) and NSM for all three species. Thus, NLA, relative to PFD, gradients became steeper with increasing shoot mass and increasing N shortage in the plant. These data are consistent with the view that internal N availability is an important factor in modifying the NLA gradient." |
Language: | English |
References: | 22 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Lötscher, M., K. Stroh, and H. Schnyder. 2003. Vertical leaf nitrogen distribution in relation to nitrogen status in grassland plants. Ann. Bot. 92(5):p. 679-688. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=110543 |
| If there are problems with this record, send us feedback about record 110543. |
| Choices for finding the above item: |
| Web URL(s): https://academic.oup.com/aob/article/92/5/679/241191/ Last checked: 03/01/2017 Requires: PDF Reader |
| MSU catalog number: QK 1 .A53 |
| Find from within TIC: Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |