PMID: 11607548Jun 6, 1995Paper

Grasshopper crop and midgut extract effects on plants: an example of reward feedback

Proceedings of the National Academy of Sciences of the United States of America
M I DyerD A Crossley

Abstract

Acid extracts and a resultant fraction from solid-phase extraction (SPE) of Romalea guttata crop and midgut tissues induce sorghum (Sorghum bicolor var. Rio) coleoptile growth in 24-h incubations an average of 49% above untreated controls. When combined with plant auxin, indole-3-acetic acid (IAA), the SPE fraction shows a synergistic reaction, yielding increases in coleoptile growth that average 295% above untreated controls and 8% above IAA standards. The interaction lowered the point of maximum sensitivity of IAA 3 orders of magnitude, resulting in a new IAA physiological set point at 10(-7) g/ml. This synergism suggests that contents in animal regurgitants making their way into plant tissue during feeding may produce a positive feedback in plant growth and development following herbivory. Such a process, also known as reward feedback, may exert major controls on ecosystem-level relationships in nature.

References

Aug 1, 1980·Proceedings of the National Academy of Sciences of the United States of America·M I Dyer

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Citations

Jul 18, 2016·Biochimica Et Biophysica Acta·Anton M SchwartzDmitry V Kuprash

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