| Title: | Grasshopper crop and midgut extract effects on plants: an example of reward feedback |
| Author(s): | Dyer MI; Moon AM; Brown MR; Crossley DA; |
| Address: | "Department of Entomology and Institute of Ecology, University of Georgia, Athens, GA 30602, USA" |
| ISSN/ISBN: | 0027-8424 (Print) 1091-6490 (Electronic) 0027-8424 (Linking) |
| 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" |
| Notes: | "PubMed-not-MEDLINEDyer, M I Moon, A M Brown, M R Crossley, D A Jr eng 1995/06/06 Proc Natl Acad Sci U S A. 1995 Jun 6; 92(12):5475-8. doi: 10.1073/pnas.92.12.5475" |
