Are there trade-offs among antiherbivore defences in Ipomoea (Convolvulaceae)?

The concept that the cost of antiherbivore defenses leads to trade-offs where species will have one but not both of a set of alternative defenses was tested in the genus Ipomoea (Convolvulaceae). Indole alkaloids were analysed in 19 species and compared with the number of other antiherbivore defense...

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