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Author: search.filters.author.Kundu, PrithaSubject: search.filters.subject.Herbivory

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    Regulatory role of phytohormones in the interaction of plants with insect herbivores
    (Elsevier B.V., 2023) Kundu, Pritha; Bera, Paramita; Mishra, Shruti; Vadassery, Jyothilakshmi
    Insect herbivores affect crop growth worldwide, causing significant yield losses annually. Phytohormones are prime signaling molecules that coordinate many physiological phenomena, besides triggering stress-responsive regulatory genes involved in plant defense. Here, we present a holistic picture of the central role of various phytohormones—jasmonic acid, salicylic acid, ethylene, abscisic acid, auxin, cytokinin, gibberellins, and brassinosteroids in regulating the diverse molecular interactions between plants and insect herbivores. With an initial overview of the early signaling response, the chapter majorly focuses on the role of different key phytohormones in defending plants against herbivory and their cross talk. We also describe the phytohormone-mediated production of secondary metabolites and other defense toxins to counteract harmful herbivores. With the well-established myriad of information in selected plant–herbivore model systems, it is now critical to translate this knowledge to less explored crop plants for sustainable development in agriculture.
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    Role of WRKY transcription factors in plant defense against lepidopteran insect herbivores: an overview
    (Springer Nature Publishing AG, 2021) Kundu, Pritha; Vadassery, Jyothilakshmi
    Plants, in nature are challenged by various environmental stresses (both biotic and abiotic), which distort the plant growth, development and crop yield. A wide range of insect herbivores attack plants across the globe, throughout the year, causing huge loss to the productivity of crop species. Being sessile, the plants respond to the crisis using a wide range of defense responsive elements which at the transcriptional level, includes the transcription factors, like WRKY, NAC, AP2/ERF, MYB, MYC, bZIP, bHLH and others. Increasing evidences suggest a pivotal role of WRKY TFs in the regulation of plant defense response against herbivory in Arabidopsis and other important crop plants. Unlike pathogenic attack, very limited information is available on the role of different WRKYs in herbivore-plant interaction. In this review, we will thus majorly focus on the role of WRKY transcription factors and its regulation in response to herbivore attack while summarizing the recent developments from the field of transcriptional, post-transcriptional and epigenetic regulation of WRKYs in response to herbivory attack with the prospects for future implementation in research.