scholarly journals Intraspecific differences in plant defense induction by fall armyworm strains

2018 ◽  
Vol 218 (1) ◽  
pp. 310-321 ◽  
Author(s):  
Flor E. Acevedo ◽  
Michelle Peiffer ◽  
Swayamjit Ray ◽  
Robert Meagher ◽  
Dawn S. Luthe ◽  
...  
Keyword(s):  
Plant Defense ◽  
Fall Armyworm ◽  
Defense Induction

scholarly journals The race goes on: A fall armyworm-resistant maize inbred line influences insect oral secretion elicitation activity and nullifies herbivore suppression of plant defense

2021 ◽  
Author(s):  
Saif ul Malook ◽  
Xiao-Feng Liu ◽  
Wende Liu ◽  
Jinfeng Qi ◽  
Shaoqun Zhou
Keyword(s):  
Plant Defense ◽  
Host Plant ◽  
Inbred Line ◽  
Defense Mechanisms ◽  
Molecular Mechanisms ◽  
Fall Armyworm ◽  
Defense Responses ◽  
Feeding Preference ◽  
Maize Inbred Line ◽  
Oral Secretion

Fall armyworm (Spodoptera frugiperda) is an invasive lepidopteran pest with strong feeding preference towards maize (Zea mays). Its success on maize is facilitated by a suite of specialized detoxification and manipulation mechanisms that curtail host plant defense responses. In this study, we identified a Chinese maize inbred line Xi502 that was able to mount effective defense in response to fall armyworm attack. Comparative transcriptomics analyses, phytohormonal measurements, and targeted benzoxazinoid quantification consistently demonstrate significant inducible defense responses in Xi502, but not in the susceptible reference inbred line B73. In 24 hours, fall armyworm larvae feeding on B73 showed accelerated maturation-oriented transcriptomic responses and more changes in detoxification gene expression compared to their Xi502-fed sibling. Interestingly, oral secretions collected from larvae fed on B73 and Xi502 leaves demonstrated distinct elicitation activity when applied on either host genotypes, suggesting that variation in both insect oral secretion composition and host plant alleles could influence plant defense response. These results revealed host plant adaptation towards counter-defense mechanisms in a specialist insect herbivore, adding yet another layer to the evolutionary arms race between maize and fall armyworm. This could facilitate future investigation into the molecular mechanisms in this globally important crop-pest interaction system.

scholarly journals “Kinases and protein motifs required for AZI1 plastid localization and trafficking during plant defense induction”

2020 ◽  
Author(s):  
Nicolás M. Cecchini ◽  
DeQuantarius J. Speed ◽  
Suruchi Roychoudhry ◽  
Jean T. Greenberg
Keyword(s):  
Plant Defense ◽  
Protein Motifs ◽  
Defense Induction

Plant defense against fall armyworm in micro-sympatric maize (Zea maysssp.mays) and Balsas teosinte (Zea maysssp.parviglumis)

2012 ◽  
Vol 145 (3) ◽  
pp. 191-200 ◽  
Author(s):  
Chelsea G. Takahashi ◽  
Lauren L. Kalns ◽  
Julio S. Bernal
Keyword(s):  
Plant Defense ◽  
Fall Armyworm

scholarly journals Defense Suppression through Interplant Communication Depends on the Attacking Herbivore Species

2021 ◽  
Author(s):  
Laura O. Marmolejo ◽  
Morgan N. Thompson ◽  
Anjel M. Helms
Keyword(s):  
Plant Defense ◽  
Plant Resistance ◽  
Defense Responses ◽  
Species Identity ◽  
Anasa Tristis ◽  
Defense Induction ◽  
Cucumber Beetles ◽  
Herbivore Species ◽  
Species Specific ◽  
Herbivore Defenses

AbstractIn response to herbivory, plants emit volatile compounds that play important roles in plant defense. Herbivore-induced plant volatiles (HIPVs) can deter herbivores, recruit natural enemies, and warn other plants of possible herbivore attack. Following HIPV detection, neighboring plants often respond by enhancing their anti-herbivore defenses, but a recent study found that herbivores can manipulate HIPV-interplant communication for their own benefit and suppress defenses in neighboring plants. Herbivores induce species-specific blends of HIPVs and how these different blends affect the specificity of plant defense responses remains unclear. Here we assessed how HIPVs from zucchini plants (Cucurbita pepo) challenged with different herbivore species affect resistance in neighboring plants. Volatile “emitter” plants were damaged by one of three herbivore species: saltmarsh caterpillars (Estigmene acrea), squash bugs (Anasa tristis), or striped cucumber beetles (Acalymma vittatum), or were left as undamaged controls. Neighboring “receiver” plants were exposed to HIPVs or control volatiles and then challenged by the associated herbivore species. As measures of plant resistance, we quantified herbivore feeding damage and defense-related phytohormones in receivers. We found that the three herbivore species induced different HIPV blends from squash plants. HIPVs induced by saltmarsh caterpillars suppressed defenses in receivers, leading to greater herbivory and lower defense induction compared to controls. In contrast, HIPVs induced by cucumber beetles and squash bugs did not affect plant resistance to subsequent herbivory in receivers. Our study shows that herbivore species identity affects volatile-mediated interplant communication in zucchini, revealing a new example of herbivore defense suppression through volatile cues.

scholarly journals Effects of the Timing of Herbivory on Plant Defense Induction and Insect Performance in Ribwort Plantain (Plantago lanceolata L.) Depend on Plant Mycorrhizal Status

2015 ◽  
Vol 41 (11) ◽  
pp. 1006-1017 ◽  
Author(s):  
Minggang Wang ◽  
T. Martijn Bezemer ◽  
Wim H. van der Putten ◽  
Arjen Biere
Keyword(s):  
Plant Defense ◽  
Plantago Lanceolata ◽  
Insect Performance ◽  
Mycorrhizal Status ◽  
Defense Induction

Bacterial Determinants and Plant Defense Induction: Their Role as Biocontrol Agents in Sustainable Agriculture

2016 ◽  
pp. 187-204 ◽  
Author(s):  
Stuti Patel ◽  
Riyaz Z. Sayyed ◽  
Meenu Saraf
Keyword(s):  
Sustainable Agriculture ◽  
Plant Defense ◽  
Biocontrol Agents ◽  
Defense Induction

Plant defense against pathogens

AccessScience ◽  
2015 ◽  
Keyword(s):  
Plant Defense

The Spread of Fall Armyworm (faw) Spodotera Frugiperda

2018 ◽  
Vol 29 (5) ◽  
pp. 213-214 ◽  
Author(s):  
Graham Matthews
Keyword(s):  
Fall Armyworm ◽  
Sub Saharan Africa ◽  
Sub Saharan ◽  
Army Worm

The author introduces the next three articles on the invasion of Fall Army Worm into Sub-Saharan Africa and Asia describing how the pest spreads, the damage it causes and approaches to its control.

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