NDLI: Antifungal activity of carrageenan extracts from the red alga Chondracanthus teedei var. lusitanicus

Content Provider	Springer Nature Link
Author	Soares, Fabiana Fernandes, Chantal Silva, Paulo Pereira, Leonel Gonçalves, Teresa
Copyright Year	2016
Abstract	Carrageenans extracted from Chondracanthus teedei var. lusitanicus were studied in order to determine their potential antifungal activity. FTIR-ATR and FT-Raman spectroscopic analysis confirmed the presence of a hybrid kappa/iota carrageenan belonging to the gametophyte phase and a hybrid xi/theta carrageenan in the tetrasporophyte phase. Kappa/iota and xi/theta carrageenan induced the formation of swollen hyphal segments in Alternaria infectoria, upon exposure to 125 and 60 μg mL$^{−1}$, respectively. The observed phenotype was similar to those induced by antifungals targeting the fungal cell wall. When exposed to 87.5 μg mL$^{−1}$ of kappa/iota carrageenan, Aspergillus fumigatus hyphae became shortened and highly branched, a phenotype commonly observed in response to antifungals. These morphological alterations were associated with a decrease of the β-glucan content in A. infectoria after exposure to 150 μg mL$^{−1}$ of kappa/iota and to 100 μg mL$^{−1}$ of xi/theta carrageenan. On the other hand, the chitin cell wall content of A. fumigatus decreased significantly upon exposure to 150 μg mL$^{−1}$ of both extracts, which triggered an increase in the content of β-glucan. Overall, the present work shows that carrageenans extracted from C. teedei var. lusitanicus cause alterations on the A. fumigatus and A. infectoria cell walls, indicating a marked antifungal activity.
Starting Page	2991
Ending Page	2998
Page Count	8
File Format	PDF
ISSN	09218971
Journal	Journal of Applied Phycology
Volume Number	28
Issue Number	5
e-ISSN	15735176
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-04-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chondracanthus teedei var. lusitanicus Rhodophyta-carrageenan Antifungal Chitin Glucan Vibrational spectroscopy Plant Sciences Freshwater & Marine Ecology Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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