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- W2616286676 endingPage "812" @default.
- W2616286676 startingPage "803" @default.
- W2616286676 abstract "Summary Plants respond to herbivory by reconfiguring hormonal networks, increasing secondary metabolite production and decreasing growth. Furthermore, some plants display a decrease in leaf energy reserves in the form of soluble sugars and starch, leading to the hypothesis that herbivory‐induced secondary metabolite production and growth reduction may be linked through a carbohydrate‐based resource trade‐off. In order to test the above hypothesis, we measured leaf carbohydrates and plant growth in seven genetically engineered Nicotiana attenuata genotypes that are deficient in one or several major herbivore‐induced, jasmonate‐dependent defensive secondary metabolites and proteins. Furthermore, we manipulated gibberellin and jasmonate signaling, and quantified the impact of these phytohormones on secondary metabolite production, sugar accumulation and growth. Simulated herbivore attack by Manduca sexta specifically reduced leaf sugar concentrations and growth in a jasmonate‐dependent manner. These effects were similar or even stronger in defenseless genotypes with intact jasmonate signaling. Gibberellin complementation rescued carbohydrate accumulation and growth in induced plants without impairing the induction of defensive secondary metabolites. These results are consistent with a hormonal antagonism model rather than a resource–cost model to explain the negative relationship between herbivory‐induced defenses, leaf energy reserves and growth." @default.
- W2616286676 created "2017-05-26" @default.
- W2616286676 creator A5003059316 @default.
- W2616286676 creator A5068391722 @default.
- W2616286676 creator A5075392541 @default.
- W2616286676 date "2017-05-18" @default.
- W2616286676 modified "2023-10-01" @default.
- W2616286676 title "Herbivory‐induced jasmonates constrain plant sugar accumulation and growth by antagonizing gibberellin signaling and not by promoting secondary metabolite production" @default.
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