Nutrients, but not genetic diversity, affect Gracilaria chilensis (Rhodophyta) farming productivity and physiological responses

Sara Usandizaga (1, 2) , Carolina Camus (1, 2) , José Luis Kappes (1, 2) , Marie Laure Guillemin (3, 4) , Alejandro H Buschmann (1, 2)

1 CeBiB - Centre for Biotechnology and Bioengineering [Santiago]
2 Universidad de los Lagos (Chile)
3 Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias
4 EBEA - Biologie évolutive et écologie des algues = Evolutionary Biology and Ecology of Algae

In terrestrial plants, it is well known that genetic diversity can affect responses to abiotic and biotic stress and have important consequences on farming. However, very little is known about the interactive effects of genetic and environmental factors on seaweed crops. We conducted a field experiment on Gracilaria chilensis to determine the effect of heterozygosity and nutrient addition on two southern Chilean farms: Ancud and Chaica. In addition to growth rate and productivity, we measured photosynthetic responses, photosynthetic pigment

Mots clés: epiphyte load; Growth; heterozygosity; Photosynthesis; Pigment content; Seaweed

Domaines: Botanique; Agronomie; Sciences et techniques des pêches

Sara Usandizaga, Carolina Camus, José Luis Kappes, Marie Laure Guillemin, Alejandro H Buschmann. Nutrients, but not genetic diversity, affect Gracilaria chilensis (Rhodophyta) farming productivity and physiological responses. Journal of Phycology, 2018, 54 (6), pp.860-869. ⟨10.1111/jpy.12785⟩. ⟨hal-04043065⟩