Plant Cell Reports

, Volume 27, Issue 2, pp 387–397 | Cite as

Wound response in passion fruit (Passiflora f. edulis flavicarpa) plants: gene characterization of a novel chloroplast-targeted allene oxide synthase up-regulated by mechanical injury and methyl jasmonate

  • César L. Siqueira-Júnior
  • Bruno C. Jardim
  • Turán P. Ürményi
  • Ana C. P. Vicente
  • Ekkehard Hansen
  • Koko Otsuki
  • Maura da Cunha
  • Hérika C. Madureira
  • Deivid R. de  Carvalho
  • Tânia Jacinto
Biotic and Abiotic Stress


The induction of a chloroplast-localized 13-lipoxygenase (13-LOX) in passion fruit leaves in response to methyl jasmonate (MeJa) was previously reported. Since allene oxide synthase (AOS) is a key cytochrome P450 enzyme in the oxylipin pathway leading to AOS-derived jasmonates, the results above led in turn to an investigation of AOS in our model plant. Spectrophotometric assays showed that 24 h exposure of MeJa caused a high increase in 13-hydroperoxy linolenic acid (13-HPOT) metabolizing activity in leaf tissue. Western analysis using polyclonal antibodies against tomato AOS strongly indicate that, at least a part of the 13-HPOT metabolizing capacity can be attributed to AOS activity. We cloned the cDNA from a novel AOS encoding gene from passion fruit, named PfAOS. The 1,512 bp open reading frame of the AOS–cDNA codes a putative protein of 504 amino acid residues containing a chloroplast target sequence. Database comparisons of the deduced amino acid sequence showed highest similarity with dicot AOSs. Immunocytochemistry analysis showed the compartmentalization of AOS in chloroplasts of MeJa treated leaves, corroborating the predicted subcellular localization. Northern analysis showed that AOS gene expression is induced in leaf tissue in response to mechanical wounding and exposure to MeJa. In addition, such treatments caused an increase in papain inhibitor(s) in leaf tissue. Taken together, these results indicate that PfAOS may play an important role in systemic wound response against chewing insect attack. Furthermore, it can be useful as a tool for understanding the regulation of jasmonates biosynthesis in passion fruit.


Allene oxide synthase Methyl jasmonate Passion fruit Wound response 





Allene oxide synthase


13-Hydroperoxy linolenic acid


Methyl jasmonate


Jasmonic acid


12-Oxo-phytodienoic acid


Cytochrome P450 subfamily


Hydroperoxide lyase


Open reading frame


Untranslated region




5′ Rapid amplification of cDNA ends





The authors are grateful to Dr. Gregg A. Howe for providing the pre-immune and the immune serum against tomato AOS. C.L.S.J was the recipient of a PhD fellowship from CAPES, B.C.J was the recipient of a PhD fellowship from UENF and H.C.M was the recipient of a PhD fellowship from UENF. This research was supported by Brazilian agencies CNPq, FAPERJ and UENF.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • César L. Siqueira-Júnior
    • 1
  • Bruno C. Jardim
    • 1
  • Turán P. Ürményi
    • 2
  • Ana C. P. Vicente
    • 3
  • Ekkehard Hansen
    • 1
  • Koko Otsuki
    • 3
  • Maura da Cunha
    • 4
  • Hérika C. Madureira
    • 5
  • Deivid R. de  Carvalho
    • 2
  • Tânia Jacinto
    • 1
  1. 1.Laboratório de Biotecnologia, Centro de Biociências e BiotecnologiaUniversidade Estadual do Norte FluminenseCampos dos GoytacazesBrazil
  2. 2.Instituto de Biofísica Carlos Chagas FilhoUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil
  3. 3.Department of GeneticsInstituto Oswaldo CruzFiocruzBrazil
  4. 4.Laboratório de Biologia Celular e Tecidual, Centro de Biociências e BiotecnologiaUniversidade Estadual do Norte FluminenseCampos dos GoytacazesBrazil
  5. 5.Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologia AgropecuáriasUniversidade Estadual do Norte FluminenseCampos dos GoytacazesBrazil

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