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1000
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Abstract/Summary
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<jats:p>Increasing atmospheric [CO<jats:sub>2</jats:sub>] is thought to contribute to changes in precipitation patterns, increasing heatwaves and severe drought scenarios. However, how the combination of elevated [CO<jats:sub>2</jats:sub>] 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<jats:italic>Coffea arabica</jats:italic>during the early growth, plants fertilized with ambient (a[CO<jats:sub>2</jats:sub>]-400 ppm) and elevated (e[CO<jats:sub>2</jats:sub>]-800 ppm) [CO<jats:sub>2</jats:sub>] 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 [CO<jats:sub>2</jats:sub>] stimulates CO<jats:sub>2</jats:sub>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 [CO<jats:sub>2</jats:sub>] compared to WW-plants. Total soluble amino acid concentration did not change significantly, while total phenolic compounds concentration decreased under e[CO<jats:sub>2</jats:sub>] regardless of water regimes. The combination of e[CO<jats:sub>2</jats:sub>]+WD increased the 5-O-caffeoylquinic acid (5-CQA) and caffeine amounts by 40-day when compared to a[CO<jats:sub>2</jats:sub>]+WD plants. Altogether, these results suggest that e[CO<jats:sub>2</jats:sub>] buffers mild-drought stress in young<jats:italic>C. arabica</jats:italic>by increasing A, iWUE and stimulating changes in the leaf contents of 5-CQA and caffeine.</jats:p>
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1000
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Hinweis
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DeepGreen-ID: 86617d86eedc4c99a4597f1251276032 ; metadata provieded by: DeepGreen (https://www.oa-deepgreen.de/api/v1/), LIVIVO search scope life sciences (http://z3950.zbmed.de:6210/livivo), Crossref Unified Resource API (https://api.crossref.org/swagger-ui/index.html), to.science.api (https://frl.publisso.de/), ZDB JSON-API (beta) (https://zeitschriftendatenbank.de/api/), lobid - Dateninfrastruktur für Bibliotheken (https://lobid.org/resources/search)
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