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Salicylic acid (SA) serves as a key hormone in plant innate immunity, including resistance in both local and systemic tissue upon biotic attacks, hypersensitive responses, and cell death. Some of the SA influences on plants include seed germination, cell growth, respiration, stomatal closure, senescence-associated gene expression, responses to ...
Salicylic acid is a phenolic phytohormone, and is found in plants with roles in plant growth and development, photosynthesis, transpiration, and ion uptake and transport. [53] Salicylic acid is involved in endogenous signaling, mediating plant defense against pathogens . [ 54 ]
Examples of plant hormones are auxins, cytokins, gibberellin, ethylene, abscisic acid, salicylic acid and jasmonates. Hormones naturally occur in extremely low, finely balanced, concentrations. Plant hormones act as plant growth regulators or modulators.
As mentioned, salicylic acid is the mode of action for the SAR pathway. ISR enhances the defense systems of the plant by jasmonic acid (JA) mode of action. Both act on the effect of the NPR-1, but SAR utilizes PR genes. It is important to note that the two mediated responses have regulatory effects on one another.
These changes were consistent across many families within the affected phyla, indicating that salicylic acid may be a key regulator of microbiome community structure. [ 14 ] Classical plant defense hormones also function in plant growth, metabolism and abiotic stress responses, obscuring the precise mechanism by which salicylic acid regulates ...
BIK1 functions to regulate the amount of salicylic acid (SA) present in the cell. When Botrytis cinerea or Alternaria brassicicola or any other necrotrophic pathogen is present, BIK1 is transcribed to regulate the pathogen response mechanisms. When BIK1 is present, SA levels decrease, allowing the nectrotrophic response to take place.
Pages in category "Plant growth regulators" ... 2,4-Dichlorophenoxyacetic acid; 1,4-Dimethylnaphthalene; Diprogulic acid; E. Ethylene (plant hormone) Ethylene ...
Programmed senescence seems to be heavily influenced by plant hormones.The hormones abscisic acid, ethylene, jasmonic acid and salicylic acid are accepted by most scientists as promoters of senescence, but at least one source lists gibberellins, brassinosteroids and strigolactone as also being involved. [2]
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