Accumulation of phytoalexins and alteration in plant hormone profiles in rice leaves following sap sucking by the brown planthopper and green rice leafhopper.

ABSTRACT: This study investigated the accumulation of cultivar-specific phytoalexins in rice-abietoryzins and oryzalactone-as well as known phytoalexins-momilactone A, phytocassane A, and oryzalexins A and S-in response to sap sucking by the brown planthopper (BPH) and the green rice leafhopper (GRL). The analysis revealed that BPH feeding induced abietoryzin accumulation in a cultivar known to accumulate these phytoalexins following fungal infection. Additionally, oryzalactone and oryzalexin S accumulated after insect attack in specific cultivars, unlike oryzalexin A. Plant hormone profiling revealed distinct associations: momilactone A accumulation was strongly correlated with salicylic acid (SA); phytocassane A with jasmonic acid, jasmonic acid-isoleucine, isopentenyladenine, and abscisic acid (A

SUBMITTER: Kariya K 

PROVIDER: S-EPMC12665441 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature