Photosynthesis limitations in three fern species

Show simple item record Gago Mariño, Jorge Coopman, Rafael E. Cabrera, Hernán Marino Hermida Carrera, Carmen Molins, Arántzazu Conesa Muñoz, Miquel Àngel Galmés Galmés, Jeroni Ribas Carbó, Miquel Flexas Sans, Jaume 2018-11-20T08:47:53Z
dc.description.abstract [eng] Maximum photosynthesis rates in ferns are generally lower than those of seed plants, but little is known about the limiting factors, which are crucial to understand the evolution of photosynthesis in land plants. To address this issue, a gas exchange/chlorophyll fluorescence analysis was performed in three fern species spanning high phylogenetic range within Polypodiopsida (Osmunda regalis, Blechnum gibbum and Nephrolepis exaltata) to determine their maximum net photosynthesis (AN), stomatal (gs) and mesophyll (gm) conductances to CO2, and the maximum velocity of carboxylation (V c,max). The in vitro Rubisco specificity factor (SC/O) was also determined. All three species had values for SC/O similar to those typical of seed plants, but values of AN, gs, gm and V c,max were within the lowest range of those observed in seed plants. In addition, gs was unresponsive to light and CO2, as already described in other fern species. On the contrary, gm varied with changes CO2. A quantitative photosynthesis limitation analysis suggested that early land plants (ferns) presented not only stomatal limitations - which were less adjustable to the environment - but also restricted gm and V c,max, resulting in limited maximum photosynthesis rates.
dc.format application/pdf
dc.relation.isformatof Versió preprint del document publicat a:
dc.relation.ispartof Physiologia Plantarum, 2013, vol. 149, p. 599-611
dc.rights (c) Scandinavian Plant Physiology Society, 2013
dc.subject.classification 57 - Biologia
dc.subject.other 57 - Biological sciences in general
dc.title Photosynthesis limitations in three fern species
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/submittedVersion 2018-11-20T08:47:53Z info:eu-repo/date/embargoEnd/2075-01-01
dc.embargo 2075-01-01
dc.rights.accessRights info:eu-repo/semantics/embargoedAccess

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