Utilize este identificador para referenciar este registo: http://hdl.handle.net/10451/4562
Título: Mycorrhization of cork oak micropropagated plantlets : its vitality during acclimatization measured with fast fluorescence techniques
Autor: Romano, A.
Strasser, R. J.
Eggenberg, P.
Martins-Loução, M. A.
Palavras-chave: Acclimatization
Chl-a-fluorescence
Ectomycorrhizas
Micropropagation
Quercus suber
Data: 1996
Editora: European Commission, Directorate-General XII, Science, Research and Development
Citação: In AZCON-AGUILAR, C. ; BAREA, J. M. ed. - Mycorrizas in integrated systems from genes to plant development : proceedings of the fourth European Symposium on Mycorrizas. Brussels ; Luxemburg : European Comission, 1996.
Resumo: In this work we propose some fluorescense tests, based on a fast data acquisition (10 us per data point with 12 bit resolution) over five orders of magnitude in time (10 us to 1s) with an optoelectronic shutterless instrument (Plant Efficiency Analyser - PEA), to evaluate the response of micropropagated cork oak plantlets with or without mycorrhiza, in vitro and ex vitro conditions. Indexes have been defined which indicate the activity, efficiency, stress resistance, adaptability and developmental complexity of a plant. The shape of the observed fluorescence transient (on a logarithmic time scale) showed the typical Fo-J-I-P levels. The results obtained showed that mycorrhization increases the quantum yield of photochemistry as well as the electron transport and the photosynthetic metabolism. The density of photosynthetic units per leaf area is highly increased in mycorrhized plantlets. Therefore the productivity per leaf area is increased in these plantlets as well. During acclimatization mycorrhized plantlets show a much higher general fitness than non-mycorrhized plantlets in relation to the defined indexes.
Peer review: yes
URI: http://hdl.handle.net/10451/4562
ISBN: 9282756769
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