Field-grown soybean induces jasmonates and defensive compounds in response to 
thrips feeding and solar UV-B radiation

Dillon, Francisco M.; Chludil, Hugo D.; Reichelt, Michael; Mithöfer, Axel; Zavala, Jorge A.

doi:10.1016/j.envexpbot.2018.08.022

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Field-grown soybean induces jasmonates and defensive compounds in response to thrips feeding and solar UV-B radiation

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Reichelt, Michael
Department of Biochemistry, Prof. J. Gershenzon, MPI for Chemical Ecology, Max Planck Society;

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Mithöfer, Axel
Department of Bioorganic Chemistry, Prof. Dr. W. Boland, MPI for Chemical Ecology, Max Planck Society;
Research Group Dr. A. Mithöfer, Plant Defense Physiology, Department of Bioorganic Chemistry, Prof. Dr. W. Boland, MPI for Chemical Ecology, Max Planck Society;

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Zitation

Dillon, F. M., Chludil, H. D., Reichelt, M., Mithöfer, A., & Zavala, J. A. (2018). Field-grown soybean induces jasmonates and defensive compounds in response to thrips feeding and solar UV-B radiation. Environmental and Experimental Botany, 156, 1-7. doi:10.1016/j.envexpbot.2018.08.022.

Zitierlink: https://hdl.handle.net/21.11116/0000-0001-F1FE-1

Zusammenfassung

Solar UV-B radiation has been reported to enhance constitutive and inducible plant
defenses against herbivore insects in many species. However, the induction of plant
defenses depends on the phytohormone profile induced by the specific herbivore feeding
guild. No study has shown the impact of soybean leaf chemical defenses induced by thrips
herbivory in combination with solar UV-B radiation on thrips performance. To uncover
plant responses to herbivory in crop conditions, we proposed the hypothesis that solar UVB
radiation will increase constitutive and inducible defenses and phytohormones related
with defenses in field-grown soybean, therefore affecting thrips performance. In this study
two soybean cultivars (cv.) were grown in field conditions under attenuated or solar UV-B
radiation and damaged by 6 days of herbivory of Caliothrips phaseoli. Our field
experiments showed similar survivorship levels of thrips that fed on foliage grown under
either attenuated or solar UV-B radiation, while survivorship of thrips that fed on cv.
Williams was lower than those that fed on cv Charata. Cv Williams produced different
flavonols and higher trypsin protease inhibitor (TPI) activity levels and more genistin than
cv Charata. The increment of jasmonic acid (JA)-regulated defenses against insects in
foliage of cv Williams was explained by the induction of JA and JA-Ile after herbivory and
solar UV-B exposure. Independently of the UV-B environment herbivory induced salicylic
acid (SA) and 12-oxo-phytodienoic acid (cis-OPDA) in both cvs. To our knowledge no
study before has showed a complete profile of defensive hormones and defensive
compounds induced by thrips feeding and solar UV-B.