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TALKING TREES. "Plants may “eavesdrop” on volatile organic compounds (VOCs) released by herbivore-attacked neighbors to activate defenses before being attacked themselves. Transcriptome and signal cascade analyses of VOC-exposed plants suggest that plants eavesdrop to prime direct and indirect defenses and to hone competitive abilities." https://lnkd.in/etuE4VS View in LinkedIn

HOW PLANTS SMELL JASMONATE. The molecular machinery for salicylate acid (same as our aspirin) and jasmonate acid plant hormones from chemoreception to gene induction, with some key pathways shared by animal cells, especially through the stress modulator, NF-kappaB. https://lnkd.in/e4rD_UV View in LinkedIn

AIRBORNE VOLATILE JASMONATE triggers a defense reaction in plants. "Jasmonate, when applied to surfaces of tomato plants, induces the synthesis of a defensive proteinase proteins in the treated plant and in nearby plants as well." A widespread warning of plant damage to all neighbors. https://lnkd.in/ewBJUE3 View in LinkedIn

DEFENSE GENES. "Transcriptional regulation is a central process in plant immunity. The induction or repression of defense genes is orchestrated by signaling networks that are directed by plant hormones of which salicylic acid (SA) and jasmonic acid (JA) are the major players. The SA- and JA-responsive signaling pathways are interdependent and act in complex networks." https://lnkd.in/e4rD_UV View in LinkedIn

JASMONATE SIGNALS IN ARABIDOPSIS. "Mechanical tissue damage inflicted on rosette leave results in large (~10 fold) and rapid (within 5 min) increases in JA and JA-IIe levels in undamaged leaves of the rosette." https://lnkd.in/eKj_2Vj View in LinkedIn

ALTERNATIVE ANATOMY. In plants, damage signals include jasmonate, "peptide or cell wall-derived oligosaccharide fragments as well as wound-induced hydraulic and electrical systems," all without a nervous system. Quite remarkable. https://lnkd.in/eKj_2Vj View in LinkedIn

JASMONATE SIGNALS. The plant hormone jasminate (JA): "recent studies provide evidence that JA mediates systemic wound responses through distinct...pathways. In both pathways, bio active JAs are recognized by an F-box protein based receptor system that couples hormone binding to ubiquitin-dependent degradation of transcriptional repressor genes." https://lnkd.in/e598pEz View in LinkedIn

RECENT JASMONATE BREAKTHROUGH. "In 2007, however, there was a breakthrough in analysis of JA signalling with the discovery of the so-called JAZ proteins (JAZMONATE ZIM DOMAIN proteins) as negative regulators in JA-induced gene expression. With the JAZ proteins, however, the first mechanistic explanations were possible on JA perception." https://lnkd.in/edPEBi9 View in LinkedIn

PLANT WOUND VOLATILES. "In tomato the volatile chemical methyl-jasmonate (the compound responsible for the smell of jasmine) is produced in response to mechanical wounding or insect feeding. Methyl-jasmonate is important in defence signalling and in stimulating the activity of genes that produce various protective chemicals." https://lnkd.in/e7UQ_sh View in LinkedIn

PLANT HORMONE CROSSTALK. The two key plant hormones are constructed to separately go after the two main classes of plant predators, the biotrophic pathogens (salicylic acid) and herbivorous insects and neurotrophic pathogens (jasmonate). A second layer of hormones works synergistically with each of them. https://lnkd.in/eRDyXB8 View in LinkedIn