Nutrient Remobilization and C:N:P Stoichiometry in Response to Elevated CO2 and Low Phosphorus Availability in Rice Cultivars Introgressed with and Without Pup1
| Author | Sandeep Sharma | |
| Author | D.H. Raviteja | |
| Author | Tarun Kumar | |
| Author | Bindraban, Prem S. | |
| Author | Renu Pandey | |
| Date of acession | 2024-05-24T08:18:50Z | |
| Date of availability | 2024-05-24T08:18:50Z | |
| Date of issue | 2024 | |
| Abstract | The continuously rising atmospheric CO2 concentration potentially increase plant growth through stimulating C metabolism; however, plant C:N:P stoichiometry in response to elevated CO2 (eCO2) under low P stress remains largely unknown. We investigated the combined effect of eCO2 and low phosphorus on growth, yield, C:N:P stoichiometry, and remobilization in rice cv. Kasalath (aus type), IR64 (a mega rice variety), and IR64-Pup1 (Pup1 QTL introgressed IR64). In response to eCO2 and low P, the C accumulation increased significantly (particularly at anthesis stage) while N and P concentration decreased leading to higher C:N and C:P ratios in all plant components (leaf, sheath, stem, and grain) than ambient CO2. The remobilization efficiencies of N and P were also reduced under low P with eCO2 as compared to control conditions. Among cultivars, the combined effect of eCO2 and low P was greater in IR64-Pup1 and produced higher biomass and grain yield as compared to IR64. However, IR64-Pup1 exhibited a lower N but higher P concentration than IR64, indicating that the Pup1 QTL improved P uptake but did not influence N uptake. Our study suggests that the P availability along with eCO2 would alter the C:N:P ratios due to their differential partitioning, thereby affecting growth and yield. | |
| Citation | Sharma, S., Raviteja, D. H., Kumar, T., Bindraban, P. S., & Pandey, R. (2024). Nutrient remobilization and c:N:P stoichiometry in response to elevated CO2 and low phosphorus availability in rice cultivars introgressed with and without PUP1. Plant Physiology and Biochemistry, 210, 108657. https://doi.org/10.1016/j.plaphy.2024.108657 | |
| URL | https://hub.ifdc.org/handle/20.500.14297/3033 | |
| Language | en | |
| Publisher | Elsevier | |
| Subject | Rice | |
| Subject | Phosphorus | |
| Subject | Carbon dioxide | |
| Title | Nutrient Remobilization and C:N:P Stoichiometry in Response to Elevated CO2 and Low Phosphorus Availability in Rice Cultivars Introgressed with and Without Pup1 | |
| Type | Article |