Induced resistance in groundnut by jasmonic acid and salicylic acid through alteration of trichome density and oviposition by Helicoverpa armigera (Lepidoptera:Noctuidae)

    War, A R and Hussain, B and Sharma, H C (2013) Induced resistance in groundnut by jasmonic acid and salicylic acid through alteration of trichome density and oviposition by Helicoverpa armigera (Lepidoptera:Noctuidae). AoB Plants. pp. 1-6. ISSN 2041-2851

    [img]
    Preview
    		 PDF (Open access Journal) - Published Version
    Download (186kB) | Preview

    Abstract

    Jasmonic acid (JA) and salicylic acid (SA) are important phytohormones involved in plant resistance against insect herbivory and pathogen infection. Application of JA and SA induces several defensive traits in plants. Here we investigated the effect of JA and SA on trichome density in five groundnut genotypes [ICGV 86699, ICGV 86031, ICG 2271, ICG 1697 (resistant) and JL 24 (susceptible)]. The effect of JA- and SA-induced resistance on the oviposition behaviour of Helicoverpa armigera on different groundnut genotypes was also studied. Pre-treatment with JA increased numbers of trichomes in the insect-resistant genotypes, ICGV 86699, ICGV 86031, ICG 2271, and ICG 1697. The induction was greater at 10 days after treatment. Jasmonic acid- and SA-treated plants showed a substantial effect on the oviposition behaviour of H. armigera. Jasmonic acid application and herbivory reduced the number of eggs laid by H. armigera in all the groundnut genotypes tested. However, a greater reduction was recorded on plants pre-treated with JA. More egg layingwas recorded in JL 24 in all the treatments as compared to the insect-resistant genotypes. These results suggested that pre-treatment with JA increased trichomedensity in groundnut plants, which conferred antixenosis for oviposition by H. armigera.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Groundnut, induced resistance, oviposition, phytohormones, trichomes
    Subjects: Mandate crops > Groundnut
    Others > Entomology
    Depositing User: Mr Siva Shankar
    Date Deposited: 02 Jan 2014 04:21
    Last Modified: 19 Jun 2023 04:22
    URI: http://oar.icrisat.org/id/eprint/7302
    Official URL: http://dx.doi.org/10.1093/aobpla/plt053
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
    Links:
    View Statistics

    Actions (login required)

    View Item View Item
    OAR@ICRISAT is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.