| |
| Web URL(s): | http://www.plantphysiol.org/cgi/content/full/119/4/1423?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&searchid=1&FIRSTINDEX=0&sortspec=relevance&volume=119&firstpage=1423&resourcetype=HWCIT
Last checked: 06/2000
Access conditions: Item is within a search engine |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Schnyder, Hans;
de Visser, Ries |
|---|
| Author Affiliation: | Schnyder: Chair of Grassland Science, Technische Universität München, D-85350 Freising-Weihenstephan, Germany (H.S.); Research Institute of Agrobiology and Soil Fertility (AB-DLO), P.O. Box 14 NL-6700 AA Wageningen, The Netherlands (R.d.V.); and de Visser: and Institut für Pflanzenbau, Universität Bonn, Katzenburgweg 5, D-53115 Bonn, Germeny (H.S.) |
|---|
| Title: | Fluxes of reserve-derived and currently assimilated carbon and nitrogen in perennial ryegrass recovering from defoliation. The regrowing tiller and its component functionally distinct zones. |
|---|
| Source: | Plant Physiology. Vol. 119, No. 4, April 1999, p. 1423-1435. |
|---|
| Publishing Information: | Rockville, MD: American Society of Plant Physiologists |
|---|
| # of Pages: | 13 |
|---|
| Keywords: | TIC Keywords: Lolium perenne; Tillers (vegetative); Regrowth; Carbon; Nitrogen; Storage; Usage
|
|---|
| Abstract/Contents: | "The quantitative significance of reserves and current assimilates in regrowing tillers of severely defoliated plants of perennial ryegrass (Lolium perenne L.) was assessed by a new approach, comprising ¹³C/¹²C and ¹⁵N/¹⁴N steady-state labeling and seperation of sink and source zones. The functionally distinct zones showed large differences in the kinetics of currently assimilated C and N. These are interpreted in terms of "substrate" and "tissue" flux among zones and C and N turnover within zones. Tillers refoliated rapidly, although C and N supply was initially decreased. Rapid refoliation was associated with (a) transient depletion of water-soluble carbohydrates and dilution of structural biomass in the immature zone of expanding leaves, (b) rapid transition to current assimilation-derived growth, and (c) rapid reestablishment of a balanced C:N ratio in growth substrate. This balance (C:N, approximately 8.9 [w/w] in new biomass) indicated coregulation of growth by C and N supply and resulted from complementary fluxes of reserve- and current assimilation-derived C and N. Reserves were the dominant N source until approximately 3 d after defoliation. Amino-C constituted approximately 60% of the net influx of reserve C during the first 2 d. Carbohydrate reserves were an insignificant source of C for tiller growth after 1 d. We discuss the physiological mechanisms contributing to defoliation tolerance." |
|---|
| Language: | English |
|---|
| References: | 53 |
|---|
| Note: | Figures
Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Schnyder, H., and R. de Visser. 1999. Fluxes of reserve-derived and currently assimilated carbon and nitrogen in perennial ryegrass recovering from defoliation. The regrowing tiller and its component functionally distinct zones.. Plant Physiol. 119(4):p. 1423-1435. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=59457 |
| If there are problems with this record, send us feedback about record 59457. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.plantphysiol.org/cgi/content/full/119/4/1423?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&searchid=1&FIRSTINDEX=0&sortspec=relevance&volume=119&firstpage=1423&resourcetype=HWCIT
Last checked: 06/2000
Access conditions: Item is within a search engine |
| 
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) |
