Early growth phase and cafeine content response to recent and projected increases in atmospheric carbon dioxide in cofee (Cofea arabica and C. canephora)
While [CO2] effects on growth and secondary chemistry are well characterized for annual plant species, little is known about perennials. Among perennials, production of Coffea arabica and C. canephora (robusta) have enormous economic importance worldwide. Three Arabica cultivars (Bourbon, Catimor, Typica) and robusta coffee were grown from germination to ca. 12 months at four CO2 concentrations: 300, 400, 500 or 600 ppm. There were signifcant increases in all leaf area and biomass markers in response to [CO2] with signifcant [CO2] by taxa diferences beginning at 122–124 days after sowing (DAS). At 366–368 DAS, CO2 by cultivar variation in growth and biomass response among Arabica cultivars was not signifcant; however, signifcant trends in leaf area, branch number and total above ground biomass were observed between Arabica and robusta. For cafeine concentration, there were signifcant diferences in [CO2] response between Arabica and robusta. A reduction in cafeine in cofee leaves and seeds might result in decreased ability against deterrence, and consequently, an increase in pest pressure.We suggest that the interspecifc diferences observed (robusta vs. Arabica) may be due to diferences in ploidy level (2n=22 vs. 2n=4x = 44). Diferential quantitative and qualitative responses during early growth and development of Arabica and robusta may have already occurred with recent [CO2] increases, and such diferences may be exacerbated, with production and quality consequences, as [CO2] continues to increase.
| Main Authors: | , , , , , , , |
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| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | Cafeína, Coffea arabica, Coffea canephora, Dióxido de carbono, Cambio climático, Artfrosur, |
| Online Access: | https://www.nature.com/articles/s41598-020-62818-x.pdf |
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