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Jasmonate-induced defense in tomato and cabbage deterred Spodoptera litura (Noctuidae) growth
Yuwatida Sripontan,Shaw-YhiHwang 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.4
Methyl jasmonate (MeJA) could trigger plant induction response. However, the induction response may vary among plant species. In this study, we assessed the effects of MeJA and host plant species on plant-induction responses and performance of the subsequent insect herbivore Spodoptera litura. Two plant species (cabbage and tomato) were sprayed with MeJA and foliage from different treated plants was fed to a third-instar S. litura larvae. In addition, the foliage was also collected during the bioassay to assess the foliar chemistry. The results indicated that the MeJA application and plant species exerted various influences on the foliar nutrient and anti-nutrient compounds, and affected the relative growth rate of S. litura. Moreover, the MeJA employed a marked effect on the plant's induction response. In summary, applying MeJA could induce the similar plant-induction response in various plant species and subsequently deter the insect growth performance.
Yuwatida Sripontan,Ching-Wen Tan,Mei-Hua Hung,Chiu-Chung Young,Shaw-YhiHwang 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.3
Fertilizer and plant-growth-promoting microorganisms (PGPMs) both benefit crop growth; however, little isknown about the interaction effects when they are combined. This study assessed the effect of PGPMs andfertilizer on plant growth, foliar chemistry, and subsequent insect feeding. Cabbage and tomato plants wereinoculated with PGPMs (fungi and bacteria) and various levels of fertilization. Plant growth parameters (freshweight, dry weight, and leaf area) and foliar chemistry (water content, protein content, and polyphenol oxidaseactivity) were then analyzed. In addition, foliage was also fed to the third instar larvae of Spodoptera litura toevaluate foliage quality. The results indicated that plant performance differed significantly among treatments,and the combined fungi Meyerozyma guilliermondii and fertilizer treatment promoted the greatest plant growth. In summary, PGPMs and fertilization can have their owneffect; their interaction effect, however, need to be clarified.