Salicylic Acid Signaling

Salicylic acid (SA) is a plant hormone and signaling molecule that plays a central role in plant defense responses, particularly systemic acquired resistance (SAR). In cannabis cultivation, SA signaling is of interest to breeders and growers studying plant immunity and stress resilience, as it regulates the plant's ability to respond to pathogenic threats. SA operates through distinct molecular pathways, often working in opposition to jasmonic acid (JA) signaling to determine whether a plant mounts a defense against biotrophic pathogens versus herbivory or necrotrophic threats. While SA itself is not a volatile terpene, its signaling cascade influences the production of secondary metabolites, including some monoterpenes and sesquiterpenes, making it relevant to understanding cannabis biochemistry under stress. Researchers examining disease resistance traits and phytochemical expression i

Breeders working on disease-resistant and stress-tolerant cultivars study SA signaling pathways to identify genetic markers associated with robust immune responses. Understanding SA regulation helps inform selection strategies for plants that mount effective defenses without depleting resources needed for cannabinoid and terpene production.