| |
| DOI: | 10.1046/j.1469-8137.1999.00388.x |
|---|
| Web URL(s): | http://www.jstor.org/stable/view/2588542
Last checked: 07/16/2014
Access conditions: Item is within a limited-access website
http://www.jstor.org/stable/pdfplus/2588542.pdf
Last checked: 07/16/2014
Requires: PDF Reader
Access conditions: Item is within a limited-acccess website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Thomas, Henry;
James, Aneurin R. |
|---|
| Author Affiliation: | Cell Biology Department, Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, UK |
|---|
| Title: | Partitioning of sugars in Lolium perenne (perennial ryegrass) during drought and on rewatering |
|---|
| Source: | New Phytologist. Vol. 142, No. 2, May 1999, p. 295-305. |
|---|
| Publishing Information: | Oxford, England: Cambridge University Press. |
|---|
| # of Pages: | 11 |
|---|
| Related Web URL: | http://www.jstor.org/stable/info/2588542
Last checked: 07/16/2014
Notes: Abstract only |
|---|
| Keywords: | TIC Keywords: Lolium perenne; Drought stress; Sugars; Partitioning; Carbohydrate reserves; Drought resistance
|
|---|
| Abstract/Contents: | "Stimulated swards of perennial ryegrass (Lolium perenne) growing in 1-mĀ³ soil blocks in the glasshouse were either well watered or deprived of water for 57 d and then rewatered. The first aim was to measure effects of drought on sugar (water-soluble carbohydrate) composition of laminae and sheaths of mature laminae, and bases and laminae of young (growing) leaves. The second aim was to use plus labelling with Ā¹ā“COā to follow the partitioning of recently-fixed assimilates, and the assembly and consumption of reserve sugars (fructans). Over the last 7 d of drought growth almost stopped, old leaves died faster than they were replaced, and total sugar (which had doubled in concentration during drought) was rapdily consumed. Leaf laminae had lower content of total sugars and of large fructan (DP > 5) than did growing bases and sheaths. Drought greatly reduced the rate at which sugar was exported from the laminae to the sheaths and growing leaf bases, and the rate at which it was converted to fructan. Nevertheless, fructan accumulated over the first 50 d of drought. Rewatering did not result in depolymerization and remobilization of sugars that had been formed during the last 7 d of drought, but stimulated their further assembly into high-DP fructans. Our hypothesis, that accumulation of neo-kestose (a DP-3 fructan) in droughted laminae was a symptom of sugar remobilization just before death, was disproved. It is concluded that sugar reserves contribute to drought resistance only under extreme conditions. The specific role of fructan in dry environments might be to improve regrowth when drought is relieved, rather than to enhance growth during drought." |
|---|
| Language: | English |
|---|
| References: | 24 |
|---|
| See Also: | Other items relating to: Disasters - Drought |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Thomas, H., and A. R. James. 1999. Partitioning of sugars in Lolium perenne (perennial ryegrass) during drought and on rewatering. New Phytol. 142(2):p. 295-305. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=60926 |
| If there are problems with this record, send us feedback about record 60926. |
| Choices for finding the above item: |
|---|
| DOI: 10.1046/j.1469-8137.1999.00388.x |
| Web URL(s):
http://www.jstor.org/stable/view/2588542
Last checked: 07/16/2014
Access conditions: Item is within a limited-access website
http://www.jstor.org/stable/pdfplus/2588542.pdf
Last checked: 07/16/2014
Requires: PDF Reader
Access conditions: Item is within a limited-acccess website |
| 
MSU catalog number: QK 1 .N38 |
| 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) |
