Jasmonic acid (JA) and its derivatives, known as jasmonates, are crucial phytohormones involved in plant immune responses against pathogens. JA plays a key role in plant defense by regulating signaling pathways and interacting with other hormones like salicylic acid (SA), ethylene (ET), and abscisic acid (ABA). It influences gene expression, activates pathogenesis-related (PR) genes, and modulates pathogen effectors, enhancing plant immunity through systemic acquired resistance (SAR) and induced systemic resistance (ISR). Climate change has increased disease pressure on plants, making JA's role in disease resistance more important. JA is involved in defending against various pathogens, including fungi, bacteria, and herbivores. It activates defense mechanisms by recognizing pathogen-associated molecular patterns (PAMPs) and effector-triggered immunity (ETI). JA also responds to damage-associated molecular patterns (DAMPs) and herbivore-associated molecular patterns (HAMPs), leading to increased JA levels and immune responses. JA is essential for plant growth and development, controlling processes like root formation, stomatal opening, and flower development. Its role in plant immunity is vital for crop improvement and food security, especially in the face of increasing pathogen threats. Understanding JA's signaling pathways and interactions with other hormones can help develop strategies to enhance plant resistance against diseases and improve agricultural productivity.Jasmonic acid (JA) and its derivatives, known as jasmonates, are crucial phytohormones involved in plant immune responses against pathogens. JA plays a key role in plant defense by regulating signaling pathways and interacting with other hormones like salicylic acid (SA), ethylene (ET), and abscisic acid (ABA). It influences gene expression, activates pathogenesis-related (PR) genes, and modulates pathogen effectors, enhancing plant immunity through systemic acquired resistance (SAR) and induced systemic resistance (ISR). Climate change has increased disease pressure on plants, making JA's role in disease resistance more important. JA is involved in defending against various pathogens, including fungi, bacteria, and herbivores. It activates defense mechanisms by recognizing pathogen-associated molecular patterns (PAMPs) and effector-triggered immunity (ETI). JA also responds to damage-associated molecular patterns (DAMPs) and herbivore-associated molecular patterns (HAMPs), leading to increased JA levels and immune responses. JA is essential for plant growth and development, controlling processes like root formation, stomatal opening, and flower development. Its role in plant immunity is vital for crop improvement and food security, especially in the face of increasing pathogen threats. Understanding JA's signaling pathways and interactions with other hormones can help develop strategies to enhance plant resistance against diseases and improve agricultural productivity.