Elevated CO2Improves Growth and Phosphorus Utilization Efficiency in Cereal Species Under Sub-Optimal Phosphorus Supply

Autor:	Rachana Verma, Krishna Kant Dubey, Vanita Jain, Altaf Ahmad, Vikas Kumar, Rakshanda Nilofar, Renu Pandey, Gaurav Zinta
Rok vydání:	2014
Předmět:	Secale Physiology Phosphorus Lateral root chemistry.chemical_element Limiting Biology biology.organism_classification chemistry.chemical_compound Agronomy chemistry Carbon dioxide Dry matter Cultivar Phosphorus utilization Agronomy and Crop Science
Zdroj:	Journal of plant nutrition
ISSN:	1532-4087 0190-4167
DOI:	10.1080/01904167.2014.983116
Popis:	Cultivars of Triticum aestivum, T. durum, and Secale cereale were grown at low (2 μM) and sufficient (500 μM) phosphorus (P) under ambient carbon dioxide (380 μmol mol−1; aCO2) and elevated CO2 (700 μmol mol−1, eCO2) to study responses of cereal species in terms of growth and P utilization efficiency (PUE) under P x CO2 interaction. Dry matter accumulation increased under eCO2 with sufficient P. Nevertheless, dry matter accumulated at eCO2 with low-P was similar to that obtained at aCO2 with sufficient P. Leaf area was 43% higher under eCO2 with sufficient P. Significant increase in lateral root density, length and surface area were noted at low-P under eCO2. Phosphorus use efficience (PUE) increased by 59% in response to eCO2­ in low-P plants. Thus, eCO2 can partly compensate effect of low-P supply because of improved utilization efficiency. Among cereals, durum wheat was more suitable in terms of PUE under high CO2 and limiting P supply.
Databáze:	OpenAIRE
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