Within-species and temperature-related variation in the growth and natural products of the red alga Asparagopsis taxiformis

Mata, Leonardo, Lawton, Rebecca J., Magnusson, Marie, Andreakis, Nikos, de Nys, Rocky, and Paul, Nicholas A. (2017) Within-species and temperature-related variation in the growth and natural products of the red alga Asparagopsis taxiformis. Journal of Applied Phycology, 29 (3). pp. 1437-1447.

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Abstract

The red algal genus Asparagopsis (Bonnemaisoniaceae) is a significant resource for bioactive natural products. However, prior to domestication for commercial production, we need to understand the potential variation in growth and concentration of natural products between isolates of Asparagopsis and, beyond that, how these traits are affected by environmental conditions. Ten isolates of Asparagopsis taxiformis were collected from tropical and warm-temperate regions in Queensland, Australia, and identified by molecular barcoding of the mitochondrial intergenic spacer (cox2–3 spacer). The isolates were cultured at three temperatures ranging from the minimum of the warm-temperate region to the maximum of the tropical region. Growth rates and the concentration of natural products varied between the region of origin, between isolates within region and between temperatures. Growth differed by up to 50% between isolates, whereas the concentration of natural products differed more than tenfold. Growth rates were highest at the minimum temperature of 20.2°C, irrespective of region of origin, and were lowest at the maximum temperature of 28.1°C. Natural products were threefold higher in tropical isolates, and this variation was not correlated to growth. Consequently, targeting isolates with high concentrations of natural products should be the primary strategy for the domestication of Asparagopsis for biotechnology applications.

Item ID: 49127
Item Type: Article (Refereed Research - C1)
Keywords: aquaculture, Bromoform, chemical defence, genetic variation, macroalgae, seaweed, Rhodophyceae
ISSN: 1573-5176
Funders: National Environmental Research Program (NERP)
Date Deposited: 13 Jun 2017 01:15
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 40%
06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060705 Plant Physiology @ 60%
SEO Codes: 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8299 Other Plant Production and Plant Primary Products > 829999 Plant Production and Plant Primary Products not elsewhere classified @ 50%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960899 Flora, Fauna and Biodiversity of Environments not elsewhere classified @ 50%
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