Feeding deterrence of Azolla in relation to deoxyanthocyanin and fatty acid composition
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522, more
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| Keywords |
Acids > Organic compounds > Organic acids > Fatty acids
Behaviour > Feeding behaviour
Flavonoids
Flora > Aquatic organisms > Aquatic plants
Pigments > Plant pigments > Aromatic compounds > Flavonoids
Azolla; Azolla filiculoides; Azolla pinnata; Lymnea swinhoei; Polypedates leucomystax
Fresh water |
| Authors | | Top |
- Cohen, M.F.
- Meziane, T.
- Tsuchiya, M.
- Yamasaki, H.
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| Abstract |
Higher levels of deoxyanthocyanins in Azolla fronds correlated with feeding deterrence against adult Lymnea swinhoei snails and Polypedates leucomystax tadpoles. After 7 days in co-culture, the growth yield of Azolla filiculoides was almost twice that of Azolla pinnata, which contained approximately 20-fold higher levels of deoxyanthocyanins. Inclusion of snails upon initiating a plant co-culture resulted in an A. pinnata growth yield that was 1.5-fold higher than that of A. filiculoides. The two plant species did not differ significantly in fatty acid composition. However, snails incubated for 1 week solely with A. pinnata showed a characteristic starvation-like fatty acid profile, with a two-fold lower proportion of polyunsaturated fatty acids (PUFAs) compared to snails that had access to A. filiculoides, either as a sole food source or in co-culture with A. pinnata. A 3-month cultivation of A. pinnata with tadpoles resulted in fronds having a 260% higher concentration of deoxyanthocyanins and a 10-fold lower proportion of PUFAs in comparison to plants unexposed to tadpoles, indicating that prolonged feeding reduces the desirability of the surviving plants as a food source. |
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