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| Open AccessCalcium-mediated rapid movements defend against herbivorous insects in Mimosa pudica
Mimosa pudica moves its leaves within seconds of being touched or wounded. Here the authors show that such movements are triggered by rapid changes in Ca2+ and action and variation potentials and provide evidence that rapid movements help protect the plant from insect attacks.
- Takuma Hagihara
- , Hiroaki Mano
- & Masatsugu Toyota
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Article
| Open AccessFunctional reduction in pollination through herbivore-induced pollinator limitation and its potential in mutualist communities
Herbivory-induced volatile organic compounds reduce pollinator visits to plants. Here, Glaum and Kessler show that despite reducing individual fitness, herbivore-induced changes can indirectly benefit overall community resilience, explaining species persistence in antagonized mutualistic communities.
- Paul Glaum
- & André Kessler
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| Open AccessThe soybean GmSNAP18 gene underlies two types of resistance to soybean cyst nematode
Peking-type and PI 88788-type soybeans are both used as sources of resistance against soybean cyst nematode. Here the authors show that in contrast to PI 88788-type resistance, whereGmSNAP18 acts in combination with two neighbouring genes, in Peking-type resistance GmSNAP18 acts with GmSHMT08to confer resistance.
- Shiming Liu
- , Pramod K. Kandoth
- & Khalid Meksem
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Article
| Open AccessA viral protease relocalizes in the presence of the vector to promote vector performance
Turnip mosaic virusinfection increases the performance of aphid vectors on host plants. Here the authors show that this phenomenon requires relocalization of a viral protease to host cell vacuoles and that this only occurs when aphids are present, suggesting a viral protein responds dynamically to a vector.
- Aurélie Bak
- , Andrea L. Cheung
- & Clare L. Casteel
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| Open AccessJasmonate response decay and defense metabolite accumulation contributes to age-regulated dynamics of plant insect resistance
Immunity deteriorates with age in animals but less is known about how aging affects immunity in plants. Here, Maoet al. show that responsiveness to the major insect defense hormone JA declines as plants age, but insect resistance still increases as plants accumulate secondary metabolites such as glucosinolates.
- Ying-Bo Mao
- , Yao-Qian Liu
- & Xiao-Ya Chen
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Article
| Open AccessRewiring of jasmonate and phytochrome B signalling uncouples plant growth-defense tradeoffs
Plant immune responses are often associated with reduced growth. Here, the authors show that combining mutations in transcriptional repressors of the defense and light perception pathways can confer both robust growth and strong herbivore defense, demonstrating that growth-defense tradeoffs can be uncoupled.
- Marcelo L. Campos
- , Yuki Yoshida
- & Gregg A. Howe
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| Open AccessDetoxification of hostplant’s chemical defence rather than its anti-predator co-option drives β-glucosidase-mediated lepidopteran counteradaptation
During herbivory, deglycosylation of glycosylated phytochemicals may release aglycones which can be toxic when ingested. Here, Poreddy et al. show that ß-glucosidase in the tobacco hornworm midgut converts a toxic glycoside to a non-toxic form, a process which is crucial for larval development.
- Spoorthi Poreddy
- , Sirsha Mitra
- & Sagar S. Pandit
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Article
| Open AccessHerbivory increases diversification across insect clades
Insects include most living species, yet the causes of this remarkable diversity remain unclear. Here, the authors show a positive relationship between herbivory and diversification among insect orders, which suggests that herbivory helps explain insect diversity.
- John J. Wiens
- , Richard T. Lapoint
- & Noah K. Whiteman
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Article
| Open AccessIndole is an essential herbivore-induced volatile priming signal in maize
Herbivore attack of plant tissue primes non-attacked tissue to respond more strongly to subsequent attacks. Here, Erb et al. identify indole as an airborne priming signal that enhances herbivore-induced defensive-volatile and stress-hormone production in systemic tissues and neighbouring plants.
- Matthias Erb
- , Nathalie Veyrat
- & Ted C. J. Turlings