Morning glory plants that can resist the effects of glyphosate also resist damage from herbivorous insects, according to a new study.
Morning glory plants that can resist the effects of glyphosate also resist damage from herbivorous insects, according to a University of Michigan study.
These traits included the amount of damage glyphosate caused the plants. Zhang also recorded insect damage to both the treated plants and control plants, noting herbivorous insects nibbling holes in the center of the leaves, on the margins of the leaves, or scraping cells off the surface of the leaves.
"Ecological theory tells us that there might be more likely a tradeoff between these two traits: A plant is more likely to put more energy into protecting itself against one of these versus the other. But we didn't see that. We saw the opposite," Zhang said. Zhang and Baucom don't know why plants resistant to glyphosate were also resistant to insect damage, but they do have some guesses. Glyphosate works by attacking what's called the shikimate pathway in plants. The shikimate pathway is a metabolic process responsible for producing chorismate, a precursor to aromatic amino acids such as tryptophan and phenylalanine. Salicylic acid, the bitter compound from which aspirin is derived, is also a product of the shikimate pathway.
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