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O objetivo deste trabalho foi avaliar o potencial de 32 espécies de algas marinhas das divisões Chlorophyta, Rhodophyta e Phaeophyta como fontes de &#945;- e &#946;-caroteno e &#945;-tocoferol. Todas as clorofíceas analisadas apresentaram &#945;- e &#946;-caroteno. Os teores máximo e mínimo de &#945;-caroteno foram detectados nas espécies do gênero Caulerpa e em Codium decorticatum, respectivamente; e &#946;-caroteno foi mais baixo em Caulerpa mexicana e mais elevado em Ulva fasciata. Dentre as rodofíceas, 11 espécies apresentaram &#945;-caroteno, com máximo em Botryocladia occidentalis. &#946;-caroteno foi encontrado em todas as algas vermelhas analisadas com teores mínimo e máximo em Gracilaria caudata e Bryothamnion triquetrum, respectivamente. As feofíceas apresentaram apenas &#946;-caroteno, com mínimo e máximo em Dictyopteris delicatula e Padina gymnospora, respectivamente. Na divisão Chlorophyta, &#945;-tocoferol, foi máximo em Codium decorticatum e mínimo em Caulerpa prolifera. Na Rhodophyta, 12 espécies apresentaram &#945;-tocoferol com teor máximo em Enantiocladia duperreyi. Na Phaeophyta, &#945;-tocoferol foi encontrado com valores mínimo e máximo em Lobophora variegata e Dictyota dichotoma, respectivamente. The aim of this work was to evaluate the potential of 32 marine macro algae species, members of Chlorophyta, Rhodophyta and Phaeophyta, as sources of a-carotene, b-carotene and a-tocopherol. Both b-carotene and a-carotene were found in all species of green macroalgae analyzed. The maximum content of a-carotene was detected in algae belonging to Caulerpa genus and the minimum in Codium decorticatum. The amount of b-carotene found was minimum in Caulerpa mexicana and maximum in Ulva fasciata. Among the Rhodophyta species, eleven contain a-carotene, the maximum content was found in Botryocladia occidentalis. b-Carotene was found in all red macroalgae analyzed presenting the lowest and highest values in Gracilaria caudata and Bryothamnion triquetrum, respectively. Species of Phaeophyta contained b-carotene but no a-carotene. The lowest value for b-carotene was found in Dictyopteris delicatula and the highest in Padina gymnospora. In Chlorophyta, the amount of a-tocopherol was maximum in Codium decorticatum and minimum in Caulerpa prolifera. In Rhodophyta, twelve species contained a-tocopherol, the highest value was found in Enantiocladia duperreyi. a-Tocopherol was detected in all Phaeophyta species analyzed. The highest and lowest values were found in Lobophora varigata and Dictyota dichotoma, respectively

α-, β-caroteno e α-tocoferol em algas marinhas in natura