Elevated [CO2] Mitigates Drought Effects and Increases Leaf 5-O-Caffeoylquinic Acid and Caffeine Concentrations During the Early Growth of Coffea Arabica Plants

Author(s)

Catarino, Ingrid C. A. ^[1] ; Monteiro, Gustavo B. ^[1] ; Ferreira, Marcelo J. P. ^[2] ; Torres, Luce M. B. ^[1] ; Domingues, Douglas S. ^[3] ; Centeno, Danilo C. ^[4] ; Lobo, Ana Karla M. ^[3] ; Silva, Emerson A. ^[1]

Affiliation

^[1] Inst Bot, Nucl Pesquisa Fisiol & Bioquim, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Biociencias, Dept Bot, Sao Paulo - Brazil

^[3] Univ Estadual Paulista, Rio Claro - Brazil

^[4] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Sao Bernardo Do Campo - Brazil

• Document type: Journal article
• Source: FRONTIERS IN SUSTAINABLE FOOD SYSTEMS; v. 5, JUL 28 2021.
• Web of Science Citations: 0

Abstract

Increasing atmospheric {[}CO2] is thought to contribute to changes in precipitation patterns, increasing heatwaves and severe drought scenarios. However, how the combination of elevated {[}CO2] and progressive drought affect plant metabolism is poorly understood. Aiming to investigate the effects of this environmental condition on photosynthesis and specialized metabolites in leaves of Coffea arabica during the early growth, plants fertilized with ambient (a{[}CO2]-400 ppm) and elevated (e{[}CO2]-800 ppm) {[}CO2] were exposed to well-watered (WW) or water-deficit (WD) regimes for 40 days. Over the 40-day-water-withdrawal, soil moisture, and leaf water potential decreased compared to WW-condition. Elevated {[}CO2] stimulates CO2 assimilation (A) and intrinsic water use efficiency (iWUE) even under WD. Drought condition slightly changed stomatal conductance, transpiration rate and maximum quantum efficiency of photosystem II (PSII) regardless of {[}CO2] compared to WW-plants. Total soluble amino acid concentration did not change significantly, while total phenolic compounds concentration decreased under e{[}CO2] regardless of water regimes. The combination of e{[}CO2]+WD increased the 5-O-caffeoylquinic acid (5-CQA) and caffeine amounts by 40-day when compared to a{[}CO2]+WD plants. Altogether, these results suggest that e{[}CO2] buffers mild-drought stress in young C. arabica by increasing A, iWUE and stimulating changes in the leaf contents of 5-CQA and caffeine. (AU)

• FAPESP's process: 19/26850-7 - Interaction between CO2-enriched atmosphere and water availability in Coffea arabica: an integrative approach
• Grantee: Ana Karla Moreira Lobo
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/08042-8 - A systems approach to understand the impact of climate changes in Coffea spp.
• Grantee: Douglas Silva Domingues
• Support Opportunities: Regular Research Grants