Plant growth responses to elevated atmospheric CO2 are increased by phosphorus sufficiency but not by arbuscular mycorrhizas
| Autor: | F. Andrew Smith, Mette Grønlund, Sally E. Smith, Iver Jakobsen, Stephanie J. Watts-Williams, Signe Sandbech Clausen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Plant growth Soil phosphorus Physiology chemistry.chemical_element Plant Science plant phosphorus uptake Real-Time Polymerase Chain Reaction Plant Roots 01 natural sciences soil phosphorus elevated atmospheric CO2 03 medical and health sciences Phosphate transporters Mycorrhizae Botany Medicago truncatula Phosphate Transport Proteins Symbiosis Brachypodium distachyon biology Elevated atmospheric CO2 Phosphorus food and beverages plant growth Carbon Dioxide Arbuscular mycorrhizal symbiosis Phosphate Transporters biology.organism_classification 030104 developmental biology Agronomy chemistry gene expression phosphate transporters Gene expression Research Paper Brachypodium 010606 plant biology & botany Plant phosphorus uptake |
| Zdroj: | Jakobsen, I, Smith, S E, Smith, F A, Watts-Williams, S J, Clausen, S S & Grønlund, M 2016, ' Plant growth responses to elevated atmospheric CO 2 are increased by phosphorus sufficiency but not by arbuscular mycorrhizas ', Journal of Experimental Botany, vol. 67, no. 21, pp. 6173-6186 . https://doi.org/10.1093/jxb/erw383 Journal of Experimental Botany |
| DOI: | 10.1093/jxb/erw383 |
| Popis: | Highlight Experiments combining elevated CO2 (eCO2), mycorrhizas and soil P level revealed that eCO2 increases the P use efficiency in Medicago truncatula and Brachypodium distachyon but not their mycorrhiza-mediated P uptake. Capturing the full growth potential in crops under future elevated CO2 (eCO2) concentrations would be facilitated by improved understanding of eCO2 effects on uptake and use of mineral nutrients. This study investigates interactions of eCO2, soil phosphorus (P), and arbuscular mycorrhizal (AM) symbiosis in Medicago truncatula and Brachypodium distachyon grown under the same conditions. The focus was on eCO2 effects on vegetative growth, efficiency in acquisition and use of P, and expression of phosphate transporter (PT) genes. Growth responses to eCO2 were positive at P sufficiency, but under low-P conditions they ranged from non-significant in M. truncatula to highly significant in B. distachyon. Growth of M. truncatula was increased by AM at low P conditions at both CO2 levels and eCO2×AM interactions were sparse. Elevated CO2 had small effects on P acquisition, but enhanced conversion of tissue P into biomass. Expression of PT genes was influenced by eCO2, but effects were inconsistent across genes and species. The ability of eCO2 to partly mitigate P limitation-induced growth reductions in B. distachyon was associated with enhanced P use efficiency, and requirements for P fertilizers may not increase in such species in future CO2-rich climates. |
| Databáze: | OpenAIRE |
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