Abstract
The greenbug aphid Schizaphis graminum causes significant damage to wheat crops, so increasing plant resistance against aphids is one of the primary tasks. It has been shown that colonization by aphids to trigger both jasmonate/ethylene- and salicylate-dependent defense responses in plants. Ethylene is produced when insects attack. It has been suggested that ethylene plays an important role in inducing resistance against pests, but the mechanism of action of ethylene is not fully understood. In this work, the role of ethylene in the induction of hormonal signaling pathways in wheat plants during the development of resistance against the greenbug aphid S. graminum was revealed by treating plants with the ethylene receptor inhibitor 1-MCP (1-methylcyclopropene) or an ethylene precursor (ethephon - ET). Analysis of the transcriptional activity of the genes of the hormonal signaling pathways ethylene, salicylic acid (SA), jasmonic acid (JA), cytokinins (CK) and abscisic acid (ABA) showed that treatment of plants with ET activated the genes SA-, JA-, ABA- and ethylene- signaling pathways (TaEIN3, TaERF1, TaWRKY53b, TaPR3, TaPR1, TaWRKY13, TaPR6, TaABI5, TaABAI and TaNCED).The study of the endogenous level of phytohormones using enzyme immunoassay showed that treatment of plants with ET induced the accumulation of ABA and indolylacetic acid (IAA), but not the content of CK after the plants were colonized by aphids. Thus, the positive effect of ethylene on the resistance of wheat plants against the greenbug aphid was proven through the synergistic effect of ethylene with SA and JA and the positive or negative regulation of the activity of the components of these signaling pathways by the phytohormones CK, ABA and IAA.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
