Category: Uncategorized

ALARM HORMONES released by plants include jasmonic acid (JA), salicylic acid (SA), and ethylene (ET). Implicitly, they are released because (somehow) the plant knows there is a threat; and equally, who are these airborne signals designed to warn? https://lnkd.in/edPEBi9 View in LinkedIn

WARNING SIGNALS. "The emission of volatile compounds is detected when foliage is browsed by animals. Threatened plants are then able to take defensive chemical measures, such as moving tannin compounds to their foliage." https://lnkd.in/eq7X3tN View in LinkedIn

STRATEGIES OF SELF-PROTECTION. "Wounding by herbivores leads to (1) direct defence via synthesis of toxic compounds as well as toxic or antinutritional proteins such as proteinase inhibitors (PIs) and (2) indirect defence by release of volatiles to affect the attraction of carnivores, parasitoids and predators or by altered oviposition of herbivores." https://lnkd.in/edPEBi9 View in LinkedIn

COMMUNITY FIRE ALARM. "Leaves normally release small quantities of volatile chemicals, but when a plant is damaged by herbivorous insects, many more volatiles are released. They may also induce defense responses in neighboring plants" which may be of other species also. https://lnkd.in/etUrY6F View in LinkedIn

PLANT MICROORGANISM DEFENSE RESPONSES. "Defense responses include suicide of the attacked host cell (the so-called hypersensitive response); the production of antimicrobial secondary metabolites (called phytoalexins); the production of pathogenesis-related (PR) proteins, of which many exert antimicrobial properties; and the production and oxidative cross-linking of cell wall polymers." https://lnkd.in/erjTj6Y View in LinkedIn

INTERNAL FIRE ALARM. "Systemic regions can be either primed or induced to express defense responses depending apparently on the cost of the defense and the intensity of the signal." https://lnkd.in/eabgX9e View in LinkedIn

INTERNAL FIRE ALARM. "In the case of internal wound signals within a plant, information is most likely carried by signaling molecules transported through phloem and xylem from the site of localized attack to systemic undamaged regions." https://lnkd.in/eabgX9e View in LinkedIn

AMPLIFICATION. "Secondary signal molecules thus serve to amplify and spread the response of the host after initial recognition of the pathogen." https://lnkd.in/erjTj6Y View in LinkedIn

AMPLIFICATION. "Induction of some defense genes requires the generation of secondary endogenous signal molecules (stress hormones) by the challenged cells in the infection site. The secondary signal molecules in turn set in motion signal transduction cascades in receiving cells, eventually leading to activation of pathogen-responsive genes." https://lnkd.in/erjTj6Y View in LinkedIn

JASMONATE (JA) SUPPRESSION. "Upon infection of tomato, they release β-(1,3)-(1,6) glucan, an exopolysaccharide, that activates the SA–NPR1 pathway, but simultaneously suppresses the JA pathway required for acquiring the host resistance." https://lnkd.in/edPEBi9 View in LinkedIn