The use of macroalgae for human nutrition is in constantly expand, particularly in Europe. In particular, the species of the genera Porphyra and Pyropia that are an economic important. (FAO 2018). Was considered for this study Porphyra dioica, present in all of Northern Europe (Holmes and Brodie 2004) is considered a species suitable for aquaculture (Pereira et al. 2004). The aim of the present research was to study the influence of different environmental parameters on thalli growth to improve the knowledge on mass cultivation methods for P. dioica. For this study thalli of P. dioica were collected along the coasts of Galicia. The blades were cultured at 14 C. The main target was to test the effects on biomass yield of photoperiod (12L: 12D, 16L: 8D and 8L: 16D) and irradiance (250 , 140 and 70 μE m-2 s-1). Furthermore was tested the "free-living" growth conditions on the conchocelis phase, traditionally cultivated on a calcareous substrate. To support the obtained data, the health status of the gametophytes was evaluated by the Fv/Fm index. The highest growth of thalli was obtained at the photoperiod 16:8 and the light intensity of 140 μE m-2 s-1. The further increase of light intensity caused a reduction in the growth due to a high light stress, as shown by the Fv/Fm index. The cultivation of the conchocelis phase in free-living conditions present excellent results.

Porphyra dioica J.Brodie et L.M.Irvine; cultivation in Europe

Damiano Spagnuolo
Primo
;
Antonio Manghisi
Secondo
;
Marina Morabito;Giuseppa Genovese
Ultimo
2020-01-01

Abstract

The use of macroalgae for human nutrition is in constantly expand, particularly in Europe. In particular, the species of the genera Porphyra and Pyropia that are an economic important. (FAO 2018). Was considered for this study Porphyra dioica, present in all of Northern Europe (Holmes and Brodie 2004) is considered a species suitable for aquaculture (Pereira et al. 2004). The aim of the present research was to study the influence of different environmental parameters on thalli growth to improve the knowledge on mass cultivation methods for P. dioica. For this study thalli of P. dioica were collected along the coasts of Galicia. The blades were cultured at 14 C. The main target was to test the effects on biomass yield of photoperiod (12L: 12D, 16L: 8D and 8L: 16D) and irradiance (250 , 140 and 70 μE m-2 s-1). Furthermore was tested the "free-living" growth conditions on the conchocelis phase, traditionally cultivated on a calcareous substrate. To support the obtained data, the health status of the gametophytes was evaluated by the Fv/Fm index. The highest growth of thalli was obtained at the photoperiod 16:8 and the light intensity of 140 μE m-2 s-1. The further increase of light intensity caused a reduction in the growth due to a high light stress, as shown by the Fv/Fm index. The cultivation of the conchocelis phase in free-living conditions present excellent results.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3209234
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