globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13088
论文题名:
Long-term elevated air [CO2] strengthens photosynthetic functioning and mitigates the impact of supra-optimal temperatures in tropical Coffea arabica and C. canephora species
作者: Rodrigues W.P.; Martins M.Q.; Fortunato A.S.; Rodrigues A.P.; Semedo J.N.; Simões-Costa M.C.; Pais I.P.; Leitão A.E.; Colwell F.; Goulao L.; Máguas C.; Maia R.; Partelli F.L.; Campostrini E.; Scotti-Campos P.; Ribeiro-Barros A.I.; Lidon F.C.; Damatta F.M.; Ramalho J.C.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期:1
起始页码: 415
结束页码: 431
语种: 英语
英文关键词: Chloroplast ; Coffee ; Elevated [CO2] ; Global warming ; Heat ; Photosynthesis ; Photosystems ; Respiratory enzymes ; RuBisCO ; Stomatal traits ; Water-use efficiency
Scopus关键词: carbon dioxide ; chloroplast ; coffee ; enzyme activity ; global warming ; photosynthesis ; physiological response ; stomatal conductance ; temperature effect ; water use efficiency ; Coffea arabica ; Coffea canephora ; carbon dioxide ; water ; acclimatization ; climate change ; Coffea ; electron transport ; genotype ; greenhouse effect ; heat ; metabolism ; photosynthesis ; physiology ; plant leaf ; plant stoma ; thylakoid ; Acclimatization ; Carbon Dioxide ; Climate Change ; Coffea ; Electron Transport ; Genotype ; Global Warming ; Hot Temperature ; Photosynthesis ; Plant Leaves ; Plant Stomata ; Thylakoids ; Water
英文摘要: The tropical coffee crop has been predicted to be threatened by future climate changes and global warming. However, the real biological effects of such changes remain unknown. Therefore, this work aims to link the physiological and biochemical responses of photosynthesis to elevated air [CO2] and temperature in cultivated genotypes of Coffea arabica L. (cv. Icatu and IPR108) and Coffea canephora cv. Conilon CL153. Plants were grown for ca. 10 months at 25/20 °C (day/night) and 380 or 700 μl CO2 l-1 and then subjected to temperature increase (0.5 °C day-1) to 42/34 °C. Leaf impacts related to stomatal traits, gas exchanges, C isotope composition, fluorescence parameters, thylakoid electron transport and enzyme activities were assessed at 25/20, 31/25, 37/30 and 42/34 °C. The results showed that (1) both species were remarkably heat tolerant up to 37/30 °C, but at 42/34 °C a threshold for irreversible nonstomatal deleterious effects was reached. Impairments were greater in C. arabica (especially in Icatu) and under normal [CO2]. Photosystems and thylakoid electron transport were shown to be quite heat tolerant, contrasting to the enzymes related to energy metabolism, including RuBisCO, which were the most sensitive components. (2) Significant stomatal trait modifications were promoted almost exclusively by temperature and were species dependent. Elevated [CO2], (3) strongly mitigated the impact of temperature on both species, particularly at 42/34 °C, modifying the response to supra-optimal temperatures, (4) promoted higher water-use efficiency under moderately higher temperature (31/25 °C) and (5) did not provoke photosynthetic downregulation. Instead, enhancements in [CO2] strengthened photosynthetic photochemical efficiency, energy use and biochemical functioning at all temperatures. Our novel findings demonstrate a relevant heat resilience of coffee species and that elevated [CO2] remarkably mitigated the impact of heat on coffee physiology, therefore playing a key role in this crop sustainability under future climate change scenarios. © 2016 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61548
Appears in Collections:影响、适应和脆弱性

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作者单位: Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress and Biodiversity), Instituto Investigação Científica Tropical, I.P. (IICT), Qta. Marquês, Av. República, Oeiras, Portugal; Setor Fisiologia Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Univ. Estadual Norte Fluminense (UENF), Darcy Ribeiro, RJ, Brazil; Centro Univ. Norte do Espírito Santo (CEUNES), Dept. Ciências Agrárias e Biológicas (DCAB), Univ. Federal Espírito Santo (UFES), Rod. BR 101 Norte, Km. 60, Bairro Litorâneo, São Mateus, ES, Brazil; Grupo Interacoes Planta-Ambiente and Biodiversidade (PlantStress and Biodiversity), Instituto Superior Agronomia, Centro de Estudos Florestais, Univ. Lisboa, Tapada da Ajuda, Lisboa, Portugal; Unid. Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Qta. Marquês, Av. República, Oeiras, Portugal; GeoBioTec, Fac. Ciências Tecnologia, Univ. Nova Lisboa, Caparica, Portugal; Centre for Ecology, Evolution and Environmental Changes (cE3c), Faculty Sciences, Univ. Lisbon, Campo Grande, Lisboa, Portugal; Dept. Biologia Vegetal, Univ. Federal Viçosa (UFV), Viçosa, MG, Brazil

Recommended Citation:
Rodrigues W.P.,Martins M.Q.,Fortunato A.S.,et al. Long-term elevated air [CO2] strengthens photosynthetic functioning and mitigates the impact of supra-optimal temperatures in tropical Coffea arabica and C. canephora species[J]. Global Change Biology,2016-01-01,22(1)
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