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Plants Modify Biological Processes to Ensure Survival following Carbon Depletion: A Lolium perenne Model

Citation

Lee, JM and Sathish, P and Donaghy, DJ and Roach, J, Plants Modify Biological Processes to Ensure Survival following Carbon Depletion: A Lolium perenne Model, PL o S One, 5, (8) EJ ISSN 1932-6203 (2010) [Refereed Article]


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Copyright Statement

Copyright 2010 Lee, JM et al.

Official URL: http://www.plosone.org/static/policies.action;jses...

DOI: doi:10.1371/journal.pone.0012306

Abstract

Background: Plants, due to their immobility, have evolved mechanisms allowing them to adapt to multiple environmentaland management conditions. Short-term undesirable conditions (e.g. moisture deficit, cold temperatures) generally reduce photosynthetic carbon supply while increasing soluble carbohydrate accumulation. It is not known, however, what strategies plants may use in the long-term to adapt to situations resulting in net carbon depletion (i.e. reduced photosynthetic carbon supply and carbohydrate accumulation). In addition, many transcriptomic experiments have typically been undertaken under laboratory conditions; therefore, long-term acclimation strategies that plants use in natural environments are not well understood. Methodology/Principal Findings: Perennial ryegrass (Lolium perenne L.) was used as a model plant to define whether plants adapt to repetitive carbon depletion and to further elucidate their long-term acclimation mechanisms. Transcriptome changes in both lamina and stubble tissues of field-grown plants with depleted carbon reserves were characterised using reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The RT-qPCR data for select key genes indicated that plants reduced fructan degradation, and increased photosynthesis and fructan synthesis capacities following carbon depletion. This acclimatory response was not sufficient to prevent a reduction (P,0.001) in net biomass accumulation, but ensured that the plant survived. Conclusions: Adaptations of plants with depleted carbon reserves resulted in reduced post-defoliation carbon mobilization and earlier replenishment of carbon reserves, thereby ensuring survival and continued growth. These findings will help pave the way to improve plant biomass production, for either grazing livestock or biofuel purposes.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Agronomy
Objective Division:Animal Production and Animal Primary Products
Objective Group:Other Animal Production and Animal Primary Products
Objective Field:Animal Production and Animal Primary Products not elsewhere classified
UTAS Author:Lee, JM (Mr Jenn Ming Lee)
UTAS Author:Donaghy, DJ (Associate Professor Danny Donaghy)
ID Code:69858
Year Published:2010
Web of Science® Times Cited:13
Deposited By:Agricultural Science
Deposited On:2011-05-23
Last Modified:2011-06-07
Downloads:444 View Download Statistics

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