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Belowground ABA boosts aboveground production of DIMBOA and primes induction of chlorogenic acid in maize
Belowground ABA boosts aboveground production of DIMBOA and primes induction of chlorogenic acid in maize
- Source :
- Plant Signaling & Behavior, Repositori Universitat Jaume I, Universitat Jaume I, Europe PubMed Central
- Publication Year :
- 2009
- Publisher :
- Informa UK Limited, 2009.
-
Abstract
- Plants activate local and systemic defence mechanisms upon exposure to stress. This innate immune response is partially regulated by plant hormones, and involves the accumulation of defensive metabolites. Although local defence reactions to herbivores are well studied, less is known about the impact of root herbivory on shoot defence. Here, we examined the effects of belowground infestation by the western corn rootworm Diabrotica virgifera virgifera on aboveground resistance in maize. Belowground herbivory by D. v. virgifera induced aboveground resistance against the generalist herbivore Spodoptera littoralis, and the necrotrophic pathogen Setosphaeria turcica. Furthermore, D. v. virgifera increased shoot levels of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), and primed the induction of chlorogenic acid upon subsequent infestation by S. littoralis. To gain insight into the signalling network behind this below- and aboveground defence interaction, we compiled a set of 32 defence-related genes, which can be used as transcriptional marker systems to detect activities of different hormone-response pathways. Belowground attack by D. v. virgifera triggered an ABA-inducible transcription pattern in the shoot. The quantification of defence hormones showed a local increase in the production of oxylipins after root and shoot infestation by D. v. virgifera and S. littoralis, respectively. On the other hand, ABA accumulated locally and systemically upon belowground attack by D. v. virgifera. Furthermore, D. v. virgifera reduced the aboveground water content, whereas the removal of similar quantities of root biomass had no effect. Our study shows that root herbivory by D. v. virgifera specifically alters the aboveground defence status of a maize, and suggests that ABA plays a role in the signalling network mediating this interaction.
- Subjects :
- Plantes--Resistència a les malalties i plagues
Plant Science
Moths
Biology
Plant Roots
Zea mays
Ferulic acid
chemistry.chemical_compound
DIMBOA
Ascomycota
Plant Growth Regulators
Chlorogenic acid
Gene Expression Regulation, Plant
Botany
Animals
Oxylipins
Spodoptera littoralis
Abscisic acid
Diabrotica virgifera
Herbivore
Gene Expression Profiling
fungi
food and beverages
Induced resistance
biology.organism_classification
Absisic acid
Article Addendum
Benzoxazines
Coleoptera
chemistry
Priming
RNA, Plant
Larva
Shoot
Plant hormone
Chlorogenic Acid
Abscisic Acid
Signal Transduction
Subjects
Details
- ISSN :
- 15592324
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Plant Signaling & Behavior
- Accession number :
- edsair.doi.dedup.....2c11a3b0da11a7296a847579e26bd677
- Full Text :
- https://doi.org/10.4161/psb.4.7.8973