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Biologia PlantarumVolume 57, Issue 1, March 2013, Pages 33-40

Photosynthetic parameters of Ulmus minor plantlets affected by irradiance during acclimatization(Article)

  • aDepartment of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal
  • bCentre for Research and Technology in Agro-Environmental and Biological Sciences (CITAB), Department of Biology and Environment, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal

Abstract

In order to set up large-scale acclimatization protocols of micropropagated plants, an in-depth knowledge of their physiological responses during in vitro to ex vitro transfer is required. This work describes the photosynthetic performance of Ulmus minor micropropagated plants during acclimatization at high irradiance (HI; 200 ± 20 μmol m-2 s-1 or low irradiance (LI; 100 ± 20 μmol m-2 s-1). During this experiment, leaf pigment content, chlorophyll a fluorescence, gas exchange, stomata morphology, the activity of the Calvin cycle enzymes and saccharides were measured in persistent and new leaves. The results indicated that HI induces a higher photosynthetic performance compared to LI. Therefore, plants acclimatized under HI are likely to survive better after field transfer. © 2012 Springer Science+Business Media B.V.

Author keywords

Calvin cycle enzymeschlorophyllelmfluorescencemicropropagationnet photosynthetic ratestomatatranspiration rate

Indexed keywords

Species Index:UlmusUlmus minor

Funding details

Funding sponsor Funding number Acronym
SFRH/BPD/74299/2010,SFRH/BPD/41700/2007

  • 1

    Received 11 August 2011, accepted 8 February 2012. Abbreviations: Car - carotenoids; Chl - chlorophyll; DM - dry mass; ci/ca - ratio of intercellular to atmospheric CO2 concentration; E - transpiration rate; Fv/Fm - variable to maximum chlorophyll fluorescence (maximal efficiency of PSII); gs - stomatal conductance; HI - high irradiance; LI - low irradiance; PN - net photosynthetic rate; PSII - photosystem 2; qN - non-photochemical quenching; qP - photochemical quenching; RH - relative humidity; RuBisCO - ribulose-1,5-bisphosphate carboxylase/oxygenase; sFBPase - stromal fructose-1,6-bisphosphatase; ΦPSII-effective quantum efficiency of PSII. Acknowledgement: This work was supported by the Portuguese Foundation for Science and Technology through a post-doctoral fellowship of M.C. Dias (SFRH/BPD/41700/2007) and S. Silva (SFRH/BPD/74299/2010). The authors acknowledge Dr. K. Bennett for her assistance in proofreading the manuscript. * Corresponding author; fax: (+351) 234 370 985, e-mail: [email protected]

  • ISSN: 00063134
  • CODEN: BPABA
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1007/s10535-012-0234-8
  • Document Type: Article

  Dias, M. C.; Department of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Portugal;
© Copyright 2013 Elsevier B.V., All rights reserved.

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