Tradeoff between resistance and tolerance to herbivore damage in a morning glory

Article Abstract:

There is a negative correlation between tolerance and resistance in the defense mechanisms of Ipomoea purpura against injury caused by herbivorous insects. Different populations of Ipomoea may develop different levels of resistance and tolerance. The development of maximum resistance and tolerance are two divergent evolutionary lines. Analysis of an evolutionary model shows that the tradeoff between these two traits constrain the evolution of resistance differently from standard allocation or ecological costs.

Insect resistance (Plants), Biocompatibility

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Genetic changes associated with adaptation restrict future evolutionary potential

Article Abstract:

The initial stages of degeneration in the anthyocyanin pigment pathway associated with an adaptive change from blue to red flowers in the morning glory Ipomoea quamoclit are described. Largely the type of anthocyanin pigment produced determines floral color in Ipomoea.

United States, Science & research, Genetic aspects, Anthocyanin, Anthocyanins

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Co-evolution and plant resistance to natural enemies

Article Abstract:

Research into resistance mechanisms in crops is helping to gain an insight into the process of co-evolution in nature. New findings about evolution in natural plant-enemy systems is likely to assist in finding new approaches to disease management.

Plants (Organisms), Diseases and pests, Bioengineering

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