| |
DOI: | 10.1104/pp.74.3.595 |
Web URL(s): | http://www.plantphysiol.org/content/74/3/595.full.pdf+html Last checked: 08/08/2012 Requires: PDF Reader Access conditions: Content is within a limited access website |
Publication Type:
| Refereed |
Author(s): | Volenec, Jeffrey J.;
Nelson, Curtis J. |
Author Affiliation: | Department of Agronomy, University of Missouri, Columbia, Missouri |
Title: | Relationship to leaf elongation rates modified by nitrogen fertilization |
Article Series: | Carbohydrate metabolism in leaf meristems of tall fescue, part 2 |
Source: | Plant Physiology. Vol. 74, No. 3, March 1984, p. 595-600. |
# of Pages: | 6 |
Related Web URL: | http://www.plantphysiol.org/content/74/3/595.abstract Last checked: 08/08/2012 Notes: Abstract only |
Keywords: | TIC Keywords: Festuca arundinacea; Nutrients; Nitrogen; Respiration; Plant composition; Proteins; Carbohydrates
|
Abstract/Contents: | "Our objective was to examine alterations in carbohydrate status of leaf meristems that are associated with nitrogen-induced changes in leaf elongation rates of tall fescue (Festuca arundinacea Schreb.). Dark respiration rates, concentrations of nonstructural carbohydrates, and soluble proteins were measured in leaf intercalary meristems and adjacent segments of elongating leaves. The two genotypes used differed by 43% in leaf elongation rate. Application of high nitrogen (336 kilograms per hectare) resulted in 140% higher leaf elongation rate when compared to plants receiving low nitrogen (22 kilograms per hectare). Leaf meristems of plants receiving high and low nitrogen had dark respiration rates of 5.4 and 2.9 microliters O2 consumed per milligram structural dry weight per hour, respectively. Concentrations of soluble proteins were lower while concentrations of fructan tended to be slightly higher in leaf meristems of low-nitrogen plants when compared to high-nitrogen plants. Concentrations of reducing sugars, nonreducing sugars, and takadiastase-soluble carbohydrate of leaf meristems were not affected by nitrogen treatment. Total nonstructural carbohydrates of leaf meristems averaged 44 and 39% of dry weight for low- and high-nitrogen plants, respectively. Within the leaf meristem, approximately 74 and 34% of the pool of total nonstructural carbohydrate could be consumed per day in high- and low-nitrogen plants, respectively, assuming no carbohydrate import to the meristem occurred. Plants were able to maintain high concentrations of nonstructural carbohydrates in leaf meristems despite a 3-fold range in leaf elongation rates, suggesting that carbohydrate synthesis and transport to leaf intercalary meristems may not limit leaf growth of these genotypes." |
Language: | English |
References: | 29 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Volenec, J. J., and C. J. Nelson. 1984. Relationship to leaf elongation rates modified by nitrogen fertilization. Plant Physiol. 74(3):p. 595-600. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=3690 |
| If there are problems with this record, send us feedback about record 3690. |
| Choices for finding the above item: |
| DOI: 10.1104/pp.74.3.595 |
| Web URL(s): http://www.plantphysiol.org/content/74/3/595.full.pdf+html Last checked: 08/08/2012 Requires: PDF Reader Access conditions: Content is within a limited access website |
| MSU catalog number: QK 1 .P68 |
| 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) |