TY - JOUR
T1 - Spider mites (Tetranychus urticae) perform poorly on and disperse from plants exposed to methyl jasmonate
AU - Rohwer, Charles L.
AU - Erwin, John E.
PY - 2010/11
Y1 - 2010/11
N2 - Jasmonates are plant hormones involved in wound and defense responses against herbivorous arthropods. Methyl jasmonate (MeJA) is used experimentally to induce defense responses in plants. In experiments outlined here we utilized a novel preference assay with unwounded plants that allowed us to study the impact of a MeJA spray on subsequent Tetranychus urticae Koch (Acari: Tetranychidae) proliferation and preference. Spraying plants with 100 μm MeJA 1 day before infestation caused mites to disperse within 2 days from treated impatiens [Impatiens wallerana Hook f., 'Super Elfin Pink' (Balsaminaceae)], pansy [Viola × wittrockiana Gams, 'Imperial Beaconsfield' (Violaceae)], and tomato [Solanum lycopersicum L., 'Big Boy' (Solanaceae)] plants. In addition, MeJA application reduced mite proliferation rate on impatiens and pansy by 60% (measured 22-34 days after infestation). Proteinase inhibitor (PI) assays suggested that MeJA-induced PIs alone were not responsible for the observed results in pansy and impatiens but may have been a factor in tomato. Implications of these results in the context of MeJA-induced resistance responses and possible directions for future research and application are discussed.
AB - Jasmonates are plant hormones involved in wound and defense responses against herbivorous arthropods. Methyl jasmonate (MeJA) is used experimentally to induce defense responses in plants. In experiments outlined here we utilized a novel preference assay with unwounded plants that allowed us to study the impact of a MeJA spray on subsequent Tetranychus urticae Koch (Acari: Tetranychidae) proliferation and preference. Spraying plants with 100 μm MeJA 1 day before infestation caused mites to disperse within 2 days from treated impatiens [Impatiens wallerana Hook f., 'Super Elfin Pink' (Balsaminaceae)], pansy [Viola × wittrockiana Gams, 'Imperial Beaconsfield' (Violaceae)], and tomato [Solanum lycopersicum L., 'Big Boy' (Solanaceae)] plants. In addition, MeJA application reduced mite proliferation rate on impatiens and pansy by 60% (measured 22-34 days after infestation). Proteinase inhibitor (PI) assays suggested that MeJA-induced PIs alone were not responsible for the observed results in pansy and impatiens but may have been a factor in tomato. Implications of these results in the context of MeJA-induced resistance responses and possible directions for future research and application are discussed.
KW - Acari
KW - Impatiens wallerana
KW - Induced host resistance
KW - Pelargonium × hortorum
KW - Proteinase inhibitor
KW - Solanum lycopersicum
KW - Tetranychidae
KW - Viola × wittrockiana
UR - http://www.scopus.com/inward/record.url?scp=78649436663&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649436663&partnerID=8YFLogxK
U2 - 10.1111/j.1570-7458.2010.01043.x
DO - 10.1111/j.1570-7458.2010.01043.x
M3 - Article
AN - SCOPUS:78649436663
SN - 0013-8703
VL - 137
SP - 143
EP - 152
JO - Entomologia Experimentalis et Applicata
JF - Entomologia Experimentalis et Applicata
IS - 2
ER -