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Elevated CO2 Influences Nematode-Induced Defense Responses of Tomato Genotypes Differing in the JA Pathway

By Yucheng Sun, Jin Yin, Haifeng Cao, Chuanyou Li, Le Kang and Feng Ge


Rising atmospheric CO2 concentrations can affect the induced defense of plants against chewing herbivores but little is known about whether elevated CO2 can change the induced defense of plants against parasitic nematodes. This study examined the interactions between the root-knot nematode Meloidogyne incognita and three isogenic tomato (Lycopersicon esculentum) genotypes grown under ambient (390 ppm) and elevated (750 ppm) CO2 in growth chambers. In a previous study with open-top chambers in the field, we reported that elevated CO2 increased the number of nematode-induced root galls in a JA-defense-dominated genotype but not in a wild-type or JA-defense-recessive genotype. In the current study, we tested the hypothesis that elevated CO2 will favor the salicylic acid (SA)-pathway defense but repress the jasmonic acid (JA)-pathway defense of plants against plant-parasitic nematodes. Our data showed that elevated CO2 reduced the JA-pathway defense against M. incognita in the wild-type and in a genotype in which defense is dominated by the JA pathway (a JA-defense-dominated genotype) but up-regulated the SA-pathway defense in the wild type and in a JA-defense-recessive genotype (jasmonate-deficient mutant). Our results suggest that, in terms of defense genes, secondary metabolites, and volatile organic compounds, induced defense of nematode-infected plants could be affected by elevated CO2, and that CO2-induced changes of plant resistance may lead to genotype-specific responses of plants to nematodes under elevated CO2. The changes in resistance against nematodes, however, were small relative to those reported for chewing insects

Topics: Research Article
Publisher: Public Library of Science
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Provided by: PubMed Central

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  9. (2005). Effects of jasmonate-induced defenses on root-knot nematode infection of resistant and susceptible tomato cultivars.
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  16. (2007). How does elevated carbon dioxide (CO2) affect plant-herbivore interactions? A field experiment and meta-analysis of CO2-mediated changes on plant chemistry and herbivore performance.
  17. (2007). Intergovernmental Panel on Climate Change
  18. (2002). Meta-analysis of sources of variation in fitness costs of plant antiherbivore defences.
  19. (2006). Modulation of reactive oxygen species activities and H2O2 accumulation during compatible and incompatible tomato-root-knot nematode interactions.
  20. (2004). Monoterpene and herbivore-induced emissions from cabbage plants grown at elevated atmospheric CO2 concentration.
  21. (2001). Monoterpene emission and monoterpene synthase activities in the Mediterranean evergreen oak Quercus ilex L. grown at elevated CO2 concentrations.
  22. (2009). No effects of elevated CO2 on the population relationship between cotton bollworm, Helicoverpa armigera Hu ┬Ębner (Lepidoptera: Noctuidae), and its parasitoid, Microplitis mediator Haliday (Hymenoptera: Braconidae).
  23. (2000). Phenolics and betacyanins in red beet root (Beta vulgaris) root: distribution and effect of cold storage on the content of total phenolics and three individual compounds.
  24. (2004). Phytoecdysteroids: A novel defense against plant-parasitic nematodes.
  25. (2007). Plant Immunity to Insect Herbivores.
  26. (2007). Resistance and tolerance in Populus tremuloides: genetic variation, costs, and environmental dependency.
  27. (2002). Resistance of cultivated tomato to cell content-feeding herbivores is regulated by the octadecanoidsignaling pathway.
  28. (2002). Responses of carboxylating enzymes, sucrose metabolizing enzymes and plant hormones in a tropical epiphytic CAM orchid to CO2 enrichment.
  29. (2009). Role of cysteine proteinase inhibitors in preference of Japanese beetles (Popillia Japonica) for soybean (Glycine max) leaves of different ages and grown under elevated CO2.
  30. (2003). Root-knot nematode parasitism and host response: molecular basis of a sophisticated interaction.
  31. (1998). Root-knot nematode resistance genes in tomato and their potential for future use.
  32. (2003). Significant changes in soil microfauna in grazed pasture under elevated carbon dioxide.
  33. (2003). Six years of in situ CO2 enrichment evoke changes in soil structure and soil biota of nutrient-poor grassland.
  34. Spickard A (2004) C3 grasses have higher nutritional quality than C4 grasses under ambient and elevated atmospheric CO2.
  35. (2004). Systemic acquired resistance.
  36. (2001). The carbonnutrient balance hypothesis: its rise and fall.
  37. (1999). The determination of flavonoid content in mulberry and their scavenging effects on superoxide radicals.
  38. (1998). The induction of volatile emissions in maize by three herbivore species with different feeding habits: possible consequences for their natural enemies.
  39. (2003). The Role of Salicylic Acid in Systemic Resistance of Tomato to Nematodes.
  40. (2003). The tomato suppressor of prosystemin-mediated responses2 gene encodes a fatty acid desaturase required for the biosynthesis of jasmonic acid and the production of a systemic wound signal for defense gene expression.
  41. (2008). Tomato susceptibility to root-knot nematodes requires an intact jasmonic acid signaling pathway.