| Title: | OPDA Has Key Role in Regulating Plant Susceptibility to the Root-Knot Nematode Meloidogyne hapla in Arabidopsis |
| Author(s): | Gleason C; Leelarasamee N; Meldau D; Feussner I; |
| Address: | "Department of Plant Molecular Biology and Physiology, Georg August University - Albrecht von Haller InstituteGottingen, Germany; Department of Plant Molecular Biology and Physiology, Georg August University - Gottingen Center for Molecular BiosciencesGottingen, Germany. Department of Plant Molecular Biology and Physiology, Georg August University - Albrecht von Haller Institute Gottingen, Germany. Department of Plant Biochemistry, Georg August University - Albrecht von Haller Institute Gottingen, Germany. Department of Plant Biochemistry, Georg August University - Albrecht von Haller InstituteGottingen, Germany; Department of Plant Biochemistry, Georg August University - Gottingen Center for Molecular BiosciencesGottingen, Germany" |
| ISSN/ISBN: | 1664-462X (Print) 1664-462X (Electronic) 1664-462X (Linking) |
| Abstract: | "Jasmonic acid (JA) is a plant hormone that plays important roles in regulating plant defenses against necrotrophic pathogens and herbivorous insects, but the role of JA in mediating the plant responses to root-knot nematodes has been unclear. Here we show that an application of either methyl jasmonate (MeJA) or the JA-mimic coronatine (COR) on Arabidopsis significantly reduced the number of galls caused by the root-knot nematode Meloidogyne hapla. Interestingly, the MeJA-induced resistance was independent of the JA-receptor COI1 (CORONATINE INSENSITIVE 1). The MeJA-treated plants accumulated the JA precursor cis-(+)-12-oxo-phytodienoic acid (OPDA) in addition to JA/JA-Isoleucine, indicating a positive feedback loop in JA biosynthesis. Using mutants in the JA-biosynthetic pathway, we found that plants deficient in the biosynthesis of JA and OPDA were hyper-susceptible to M. hapla. However, the opr3 mutant, which cannot convert OPDA to JA, exhibited wild-type levels of nematode galling. In addition, mutants in the JA-biosynthesis and perception which lie downstream of opr3 also displayed wild-type levels of galling. The data put OPR3 (OPDA reductase 3) as the branch point between hyper-susceptibility and wild-type like levels of disease. Overall, the data suggests that the JA precursor, OPDA, plays a role in regulating plant defense against nematodes" |
| Keywords: | Coi1 Jasmonic acid induced resistance nematodes opda plant defense plant hormones; |
| Notes: | "PubMed-not-MEDLINEGleason, Cynthia Leelarasamee, Natthanon Meldau, Dorothea Feussner, Ivo eng Switzerland 2016/11/09 Front Plant Sci. 2016 Oct 24; 7:1565. doi: 10.3389/fpls.2016.01565. eCollection 2016" |
