Effects of elevated atmospheric CO2 concentration on growth and photosynthesis in eddo at two different air temperatures
| Autor: | Miyuki Nakajima, Etsushi Kumagai, Michio Kawasaki, Akik Bin Zaher, Toshinori Matsunami, Toshihiro Hasegawa, Takayuki Yabiku, Nguyen Cong Thinh, Nobuhiko Matsuyama |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
elevated co2 photosynthesis rice Agricultural management food and beverages Plant culture 04 agricultural and veterinary sciences Photosynthesis 01 natural sciences SB1-1110 Crop eddo Agronomy Co2 concentration 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science dry matter production Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Plant Production Science, Vol 24, Iss 3, Pp 363-373 (2021) |
| ISSN: | 1349-1008 1343-943X |
| DOI: | 10.1080/1343943x.2020.1862682 |
| Popis: | Future agricultural management programs should consider the responsiveness of crops to increasing atmospheric CO2 concentrations ([CO2]) and temperatures. Eddo is an important tuber crop widely grown in Asia, but its response to [CO2] and temperatures remains largely unknown. We investigated the responses of eddo and rice plants to elevated [CO2] (ambient [CO2] + 200 µmol mol−1) at low and high temperatures during the early-to-intermediate growth stage in temperature gradient chambers in 2018 and 2019. The dry weights (DWs) of the eddo leaf blades, petioles, roots, and above-ground parts as well as the DWs of the rice leaf blades, leaf sheaths and stems, above-ground parts, and whole plants significantly increased under elevated [CO2]. The number of leaves, leaf area, and SPAD value of eddo significantly increased under elevated [CO2], whereas the leaf area and SPAD value of rice did not. The net photosynthetic rate of eddo and rice tended to increase under elevated [CO2]. The increasing ratio of the total DW in elevated vs ambient [CO2] was significantly higher for eddo than for rice. The result indicates that elevated [CO2] increases the eddo biomass more than the rice biomass, possibly because of the increasing eddo leaf area and SPAD value induced by elevated [CO2]. The total DW of rice increased significantly in response to the high air temperature under elevated [CO2] conditions. However, the effect of [CO2] on the total DW of eddo was similar at both temperatures, reflecting the non-significant interaction between [CO2] and temperature. Abbreviations: [CO2]: atmospheric carbon dioxide concentration, DW: dry weight, FACE: free-air CO2 enrichment, gs: stomatal conductance, PN: net photosynthetic rate, TGC: temperature gradient chamber |
| Databáze: | OpenAIRE |
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