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Treatments for induction of cold hardiness in Picea abies (L.) Karst. and Pinus sylvestris L. seedlings pre-cultivated under light-emitting diodes–impact of photoperiod and temperature including energy consumption and seedling quality after cold storage
Dalarna University, School of Technology and Business Studies, Energy Technology.ORCID iD: 0000-0001-6805-2112
2020 (English)In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891Article in journal (Refereed) In press
Abstract [en]

In Nordic climates, the weather allows a narrow time window during spring and summer for forest seedlings to be transplanted from indoor growth to outdoor conditions. If a new method for year-round cultivation under LED lamps is to be successfully introduced in forest nurseries, a cold storage phase for batches produced outside of the vegetation period needs to be included in the concept. Different short-day treatments for induction of cold hardiness in very young seedlings of Picea abies and Pinus sylvestris cultivated solely under LED lamps were investigated. The study compared a combination of two photoperiods (5 h or 8 h) at three different temperatures (5°C, 10°C or 20°C) applied during five weeks. Chlorophyll fluorescence, shoot electrolyte leakage and molecular testing for gene expression of cold acclimation were used to assess the treatments. After a period of three months in cold storage at 2°C, the vitality of the seedlings was evaluated using a root growth capacity test. Lower temperatures during the treatments, especially for Pinus sylvestris, had a significant effect on inducing cold hardiness. The results showed that the photoperiod should not be overly reduced to allow photosynthesis and generation of carbohydrate reserves but it could be optimized to reduce electricity consumption. © 2020, © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Place, publisher, year, edition, pages
2020.
Keywords [en]
Cold hardiness, containerized forest seedlings, photoperiod and temperature, seedling cold storage, seedling quality, short-day treatments, year-round cultivation under LED lamps, Cold storage, Electrolytes, Energy utilization, Gene expression, Light emitting diodes, Plants (botany), Seed, LEd lamps, Forestry
National Category
Agricultural Science, Forestry and Fisheries
Research subject
Energy and Built Environments
Identifiers
URN: urn:nbn:se:du-31814DOI: 10.1080/02827581.2020.1718199ISI: 000511579400001Scopus ID: 2-s2.0-85078399653OAI: oai:DiVA.org:du-31814DiVA, id: diva2:1391048
Available from: 2020-02-03 Created: 2020-02-03 Last updated: 2020-03-12Bibliographically approved

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Hernandez Velasco, Marco

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CiteExportLink to record
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Citation style
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