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The Arabidopsis Pep-PEPR system is induced by herbivore feeding and contributes to JA-mediated plant defence against herbivory.

Klauser D, Desurmont GA, Glauser G, Vallat A, Flury P, Boller T, Turlings TC, Bartels S - J. Exp. Bot. (2015)

Bottom Line: By using Arabidopsis GUS-reporter lines, it is now shown that the promoters of both Pep-receptors, PEPR1 and PEPR2, as well as PROPEP3 are strongly activated upon herbivore attack.Moreover, pepr1 pepr2 double mutant plants, which are insensitive to Peps, display a reduced resistance to feeding Spodoptera littoralis larvae and a reduced accumulation of jasmonic acid upon exposure to herbivore oral secretions.Taken together, these lines of evidence extend the role of the AtPep-PEPR system as a danger detection mechanism from microbial pathogens to herbivores and further underline its strong interaction with jasmonic acid signalling.

View Article: PubMed Central - PubMed

Affiliation: Zürich-Basel Plant Science Center, University of Basel, Department of Environmental Sciences, Botany, Hebelstrasse 1, CH-4056 Basel, Switzerland.

No MeSH data available.


Related in: MedlinePlus

Generalist herbivores perform better on plants impaired in AtPep-signalling. Mass of Spodoptera littoralis larvae (mean ±1 SE) at the beginning of the experiment (left) and after 10 d of feeding (right) on Arabidopsis Col-0 wild-type and pepr1 pepr2 mutant plants. Letters indicate significant differences between the means (α=0.05, one-way ANOVA, JMP9).
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Figure 4: Generalist herbivores perform better on plants impaired in AtPep-signalling. Mass of Spodoptera littoralis larvae (mean ±1 SE) at the beginning of the experiment (left) and after 10 d of feeding (right) on Arabidopsis Col-0 wild-type and pepr1 pepr2 mutant plants. Letters indicate significant differences between the means (α=0.05, one-way ANOVA, JMP9).

Mentions: To asses further the indicated importance of the Pep-PEPR system during herbivore challenge, the feeding performance of Spodoptera littoralis on pepr1 pepr2 mutant plants, fully impaired in AtPep-signalling (Krol et al., 2010; Yamaguchi et al., 2010), was compared to Col-0 wild-type plants. Ten first instar larvae were placed on each plant for feeding. Ten days later, the larvae were removed and their performance was determined by weight gain. A remarkable difference was found in growth. Larvae feeding on Col-0 wild-type plants reached an average weight of 2.86mg whereas the ones feeding on pepr1 pepr2 plants showed an average weight of 5.37mg (Fig. 4). Comparing the performance, it was found that pepr1 pepr2 feeding larvae grew a significant 87% larger than their counterparts on Col-0 wild-type plants (F1,13=4.82, P=0.047). Therefore, the biological relevance of the Pep-PEPR system for herbivore resistance could be proved.


The Arabidopsis Pep-PEPR system is induced by herbivore feeding and contributes to JA-mediated plant defence against herbivory.

Klauser D, Desurmont GA, Glauser G, Vallat A, Flury P, Boller T, Turlings TC, Bartels S - J. Exp. Bot. (2015)

Generalist herbivores perform better on plants impaired in AtPep-signalling. Mass of Spodoptera littoralis larvae (mean ±1 SE) at the beginning of the experiment (left) and after 10 d of feeding (right) on Arabidopsis Col-0 wild-type and pepr1 pepr2 mutant plants. Letters indicate significant differences between the means (α=0.05, one-way ANOVA, JMP9).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4526914&req=5

Figure 4: Generalist herbivores perform better on plants impaired in AtPep-signalling. Mass of Spodoptera littoralis larvae (mean ±1 SE) at the beginning of the experiment (left) and after 10 d of feeding (right) on Arabidopsis Col-0 wild-type and pepr1 pepr2 mutant plants. Letters indicate significant differences between the means (α=0.05, one-way ANOVA, JMP9).
Mentions: To asses further the indicated importance of the Pep-PEPR system during herbivore challenge, the feeding performance of Spodoptera littoralis on pepr1 pepr2 mutant plants, fully impaired in AtPep-signalling (Krol et al., 2010; Yamaguchi et al., 2010), was compared to Col-0 wild-type plants. Ten first instar larvae were placed on each plant for feeding. Ten days later, the larvae were removed and their performance was determined by weight gain. A remarkable difference was found in growth. Larvae feeding on Col-0 wild-type plants reached an average weight of 2.86mg whereas the ones feeding on pepr1 pepr2 plants showed an average weight of 5.37mg (Fig. 4). Comparing the performance, it was found that pepr1 pepr2 feeding larvae grew a significant 87% larger than their counterparts on Col-0 wild-type plants (F1,13=4.82, P=0.047). Therefore, the biological relevance of the Pep-PEPR system for herbivore resistance could be proved.

Bottom Line: By using Arabidopsis GUS-reporter lines, it is now shown that the promoters of both Pep-receptors, PEPR1 and PEPR2, as well as PROPEP3 are strongly activated upon herbivore attack.Moreover, pepr1 pepr2 double mutant plants, which are insensitive to Peps, display a reduced resistance to feeding Spodoptera littoralis larvae and a reduced accumulation of jasmonic acid upon exposure to herbivore oral secretions.Taken together, these lines of evidence extend the role of the AtPep-PEPR system as a danger detection mechanism from microbial pathogens to herbivores and further underline its strong interaction with jasmonic acid signalling.

View Article: PubMed Central - PubMed

Affiliation: Zürich-Basel Plant Science Center, University of Basel, Department of Environmental Sciences, Botany, Hebelstrasse 1, CH-4056 Basel, Switzerland.

No MeSH data available.


Related in: MedlinePlus