Vicia faba plants respond to oviposition by invasive Halyomorpha halys activating direct defences against offspring
The invasive stink bug Halyomorpha halys is established in many European and American agro-ecosystems, where it causes severe crop losses. Potential control measures might include enhancement of plant defences. When attacked by herbivorous insects that oviposit on it, the plant may respond by primin...
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Published in | Journal of pest science Vol. 91; no. 2; pp. 671 - 679 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.03.2018
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | The invasive stink bug
Halyomorpha halys
is established in many European and American agro-ecosystems, where it causes severe crop losses. Potential control measures might include enhancement of plant defences. When attacked by herbivorous insects that oviposit on it, the plant may respond by priming direct defences, which might affect the development of future brood.
Halyomorpha halys
attacks numerous plant species in the invaded areas. Here, we investigated whether
Vicia faba
plants challenged by
H. halys
females can impair the development of its offspring through the activation of induced direct defences. We measured the weight and dimension of nymphs that developed on oviposition-experienced plants after 7 and 17 days from hatching. Nymphs that developed on oviposition-experienced plants weighed less compared to those that developed either on control plants or on plants solely subjected to
H. halys
feeding, and third instars showed shorter dimensions (tibia length). In addition, when oviposition-experienced plants were attacked by nymphs, higher and more rapid expression of two jasmonic acid-dependent genes (cysteine proteinase inhibitor gene and
NAI1
) was detected, possibly due to a mechanism of priming. Increased expression of the salicylic acid-responsive
PR1
gene was also detected in egg-experienced plants, although the response was delayed compared to JA-dependent genes. Our results suggest that
V. faba
plants recognize
H. halys
oviposition as a warning signal and pre-activate defences against future nymphal herbivory. |
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ISSN: | 1612-4758 1612-4766 |
DOI: | 10.1007/s10340-018-0955-3 |