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http://nopr.niscpr.res.in/handle/123456789/33775| Title: | Interactive effects of elevated CO2 and phosphorus nutrition on growth and phosphorus utilization efficiency in wheat and rye |
| Authors: | Pandey, Renu Dubey, Krishna Kant Singh, Renu Lekshmy, S Kumar, Arun Jain, Vanita |
| Issue Date: | Dec-2015 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | An attempt was made to study the interactive effects of phosphorus (P) nutrition and elevated CO2 on growth and P-utilization efficiency (PUE) in wheat and rye. Wheat (PBW-396, PDW-233) and rye (WSP-540-2) were grown at low (2 μM) and sufficient (500 μM) P under ambient (380±10 μmol mol-1, aCO2) and elevated CO2 concentrations (700 μmol mol-1, eCO2). Results revealed that shoot, root and total plant dry matter accumulation and partitioning were significantly influenced by CO2 and P levels. eCO2 increased shoot dry matter up to 27% in PDW-233 compared to aCO2 plants grown under sufficient P. Partitioning of dry matter towards root was higher in plants raised under eCO2 with low-P resulting in maximum root-to-shoot ratio. Total leaf area was 71% higher in rye under eCO2 with sufficient P compared to aCO2. Significantly higher lateral root density, length and surface area were noted in plants grown at low-P under eCO2 as compared to aCO2. The total P uptake was increased by 70% when plants were raised with sufficient P under eCO2 in comparison to aCO2 while the PUE increased by 26% in response to CO2 enrichment at low-P. Among cereals grown at low-P, highest PUE was observed in PBW-396 in response to elevated CO2. These finding suggests that cereals would be more responsive to P nutrition and efficient in its utilization even at low-P conditions under rising atmospheric CO2 levels. |
| Page(s): | 93-100 |
| ISSN: | 0975-2412 (Online); 0771-7706 (Print) |
| Appears in Collections: | BVAAP Vol.23(2) [December 2015] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| BVAAP 23(2) 93-100.pdf | 113.23 kB | Adobe PDF | View/Open |
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