Dichotomous Role of Jasmonic Acid in Modulating Sorghum Defense Against Aphids

• DOI: 10.1094/mpmi-01-22-0005-r
• Publication Date: 2022-04-08T14:49:31Z
• Authors: Sajjan Grover; Heena Puri; Zhanguo Xin; Scott E. Sattler; Joe Louis
• Keywords: Jasmonic acid; Brevicoryne brassicae

The precursors and derivatives of jasmonic acid (JA) contribute to plant protective immunity insect attack. However, the role JA in sorghum (Sorghum bicolor) defense against sugarcane aphid (SCA) (Melanaphis sacchari), which is considered a major threat production, remains elusive. Sorghum SC265, previously identified as SCA-resistant genotype among nested association mapping founder lines, transiently increased at early stages feeding deterred settling. Monitoring behavior using electropenetrography, technique unveil process piercing-sucking insects, revealed that SC265 plants restricted SCA from phloem sap. exogenous application attenuated resistant phenotype promoted improved colonization on plants. This was further confirmed with JA-deficient plants, deficiency settling, however, it also reduced sap curtailed population. Exogenous caused enhanced proliferation suggesting promotes growth development. altered sugar metabolism levels fructose trehalose compared wild-type Furthermore, artificial diet containing reproduction. Our findings underscore unknown dichotomous JA, may have opposing effects by deterring settling during stage enhancing proliferative capacity later [Formula: see text] Copyright © 2022 Author(s). an open access article distributed under CC BY-NC-ND 4.0 International license.