Effects of elevated CO2 on plant growth and nutrient partitioning of rice (Oryza sativa L.) at rapid tillering and physiological maturity
Article
Article Title | Effects of elevated CO2 on plant growth and nutrient partitioning of rice (Oryza sativa L.) at rapid tillering and physiological maturity |
---|---|
ERA Journal ID | 2755 |
Article Category | Article |
Authors | |
Author | Seneweera, Saman |
Journal Title | Journal of Plant Interactions |
Journal Citation | 6 (1), pp. 35-42 |
Number of Pages | 8 |
Year | 2011 |
Place of Publication | Abingdon, Oxon. United Kingdom |
ISSN | 1742-9145 |
1742-9153 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/17429145.2010.513483 |
Abstract | This work investigates the relationship between plant growth, grain yield, nutrient acquisition and partitioning in rice (Oryza sativa L.) under elevated CO2. Plants were grown hydroponically in growth chambers with a 12-h photoperiod at either 370 or 700 mmol CO2 mol-1 concentration. Plant dry mass (DM), grain yield and macroand micronutrient concentrations of vegetative organs and grains were determined. Elevated CO2 increased biomass at tillering, and this was largely due to an increase in root mass by 160%. Elevated CO2 had no effect on total nutrient uptake (N, P, K, Mg and Ca). However, nutrient partitioning among organs was significantly altered. N partitioning to leaf blades was significantly decreased, whereas the N partitioning into the leaf sheaths and roots was increased. Nutrient use efficiency of N, P, K, and Mg in all organs was significantly increased at elevated CO2. At harvest maturity, grain yield was increased by 27% at elevated CO2 while grain (protein) concentration was decreased by a similar magnitude (28%), suggesting that critical nutrient requirements for rice might need to be reassessed with global climate change. |
Keywords | dry matter partitioning; elevated CO2; grain yield; nitrogen; nutrient partitioning; nutrient use efficiency; phosphorus; potassium; rice |
ANZSRC Field of Research 2020 | 310806. Plant physiology |
300404. Crop and pasture biochemistry and physiology | |
310804. Plant developmental and reproductive biology | |
Public Notes | © 2011 Taylor & Francis. Published version deposited in accordance with the copyright policy of the publisher. |
Byline Affiliations | University of Melbourne |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q273q/effects-of-elevated-co2-on-plant-growth-and-nutrient-partitioning-of-rice-oryza-sativa-l-at-rapid-tillering-and-physiological-maturity
1701
total views6
total downloads2
views this month0
downloads this month