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Nutritional studies of the submerged marine angiosperm Thalassia testudinum 1. Growth responses of axenic seedlings to nitrogen enrichment
Durako, M.J.; Moffler, M.D. (1987). Nutritional studies of the submerged marine angiosperm Thalassia testudinum 1. Growth responses of axenic seedlings to nitrogen enrichment. Am. J. Bot. 74(2): 234-240
In: American Journal of Botany. Botanical Society of America: Lancaster, Pa.. ISSN 0002-9122; e-ISSN 1537-2197
Peer reviewed article  

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Trefwoorden
    Biochemische compositie; Controlled conditions; Groei; Nutriënten; Stikstof; Waterplanten; Thalassia testudinum K.D.Koenig, 1805 [WoRMS]; Marien

Auteurs  Top 
  • Durako, M.J.
  • Moffler, M.D.

Abstract
    Algae- and bacteria-free seedling cultures of the seagrass Thalassia testudinum Banks ex Koenig were utilized to evaluate effects of nutrient enrichment on growth and chemical composition. Seedlings cultured in media based on both synthetic seawater and NH-15 medium amended with inorganic nitrogen (NH4+) and organic nitrogen (glutamine, glutamate, urea and yeast extract) exhibited no growth enhancement relative to controls in the growth parameters measured. General decreases in green leaf areas and leaf widths after one month coupled with relatively high C:N ratios after 3 months in culture suggest utilization and depletion of stored reserves with little or no assimilation of exogenous nutrients. These observations coupled with previous results in non-axenic seedling cultures indicate microbial associations may play a critical role in the nutrient physiology of this species.

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