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We relate, for the first time, the expression of photosynthetic, antioxidant and metal detoxification-related genes to net plant productivity (NPP). Results revealed a consistent pattern between gene expression and productivity indicating water origin as the main source of variability. However, the hypothesised beneficial effect of high CO<jats:sub>2<\/jats:sub>around vents was not supported. We observed a consistent long- and short-term pattern of gene down-regulation and 2.5-fold NPP decrease in plants incubated in water from the vents and a generalized up-regulation and NPP increase in plants from the vent site incubated with water from the Reference site. Contrastingly, NPP of specimens experimentally exposed to a CO<jats:sub>2<\/jats:sub>range significantly correlated with CO<jats:sub>2<\/jats:sub>availability. The down-regulation of metal-related genes in<jats:italic>C. nodosa<\/jats:italic>leaves exposed to water from the venting site suggests that other factors than heavy metals, may be at play at Vulcano confounding the CO<jats:sub>2<\/jats:sub>effects.<\/jats:p>","DOI":"10.1038\/srep42278","type":"journal-article","created":{"date-parts":[[2017,2,13]],"date-time":"2017-02-13T10:56:23Z","timestamp":1486983383000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Linking gene expression to productivity to unravel long- and short-term responses of seagrasses exposed to CO2 in volcanic vents"],"prefix":"10.1038","volume":"7","author":[{"given":"Irene","family":"Oliv\u00e9","sequence":"first","affiliation":[]},{"given":"Jo\u00e3o","family":"Silva","sequence":"additional","affiliation":[]},{"given":"Chiara","family":"Lauritano","sequence":"additional","affiliation":[]},{"given":"Monya M.","family":"Costa","sequence":"additional","affiliation":[]},{"given":"Miriam","family":"Ruocco","sequence":"additional","affiliation":[]},{"given":"Gabriele","family":"Procaccini","sequence":"additional","affiliation":[]},{"given":"Rui","family":"Santos","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2017,2,13]]},"reference":[{"key":"BFsrep42278_CR1","unstructured":"P\u00f6rtner, H. 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