Thigmomorphogenesis:  the relationship of mechanical perturbation to elicitor-like activity and ethylene production.
An extracellular solution obtained from bean (Phaseolus vulgaris L. cv.  Resistant Cherokee Wax) stems induced phytoalexin-like substance and ethylene production in a soybean [Glycine max (L.) Merr. cv. Wayne] cotyledon bioassay.  The elicitor-like activity for phytoalexin formation and ethylene production was increased by mechanical perturbation of bean stems.  Moreover, the application of extracted or known elicitors to bean plants mimicked the effect of mechanical perturbation (i.e., inhibition of stem elongation and enhancement of radial growth).  The effects of extract when applied exogenously, on elicitor-like activity in the bioassay as well as stem thickening were decreased by aminoethoxyvinylglycine, an inhibitor of ethylene biosynthesis.  These results suggest that elicitor-like substances which are formed in response to mechanical perturbation contribute to the thigmomorphogenesis.
Takahashi
H
H
Dept of Biology, Wake Forest Univ., Winston-Salem, NC 27109, USA.
Jaffe
M J
MJ
D000596:Amino Acids / Q000494:pharmacology; D000598:Amino Acids, Cyclic; D018548:Cotyledon / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism / Q000502:physiology; D005030:Ethylenes / Q000096:biosynthesis*; D007887:Fabaceae / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*; D007210:Indoleacetic Acids / Q000494:pharmacology; D009943:Organophosphorus Compounds / Q000494:pharmacology; D010812:Physical Stimulation; D010936:Plant Extracts / Q000096:biosynthesis / Q000494:pharmacology*; D010937:Plant Growth Regulators / Q000494:pharmacology; D018547:Plant Stems / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism / Q000502:physiology; D010946:Plants, Medicinal; D012717:Sesquiterpenes; D013025:Glycine max / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*; D013314:Stress, Mechanical; D013729:Terpenes; D000094162:Phytoalexins
D000596:Amino Acids; D000598:Amino Acids, Cyclic; D005030:Ethylenes; D007210:Indoleacetic Acids; D009943:Organophosphorus Compounds; D010936:Plant Extracts; D010937:Plant Growth Regulators; D012717:Sesquiterpenes; D013729:Terpenes; C023863:1-aminocyclopropane-1-carboxylic acid; C030737:indoleacetic acid; C036216:ethylene; C005073:ethephon; D000094162:Phytoalexins