期刊
ENVIRONMENTAL CHEMISTRY LETTERS
卷 15, 期 1, 页码 101-123出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10311-016-0584-0
关键词
Exogenous salicylic acid; Plant diseases; Biotic stress; Abiotic stress; Heavy metal; Micronutrient toxicity
资金
- University Grant Commission [F. 30-70/2014(BSR)]
Pollution and climate change degrade plant health. Plant stress can be decreased by application of salicylic acid, an hormone involved in plant signaling. Salicylic acid indeed initiates pathogenesis-related gene expression and synthesis of defensive compounds involved in local resistance and systemic acquired resistance. Salicylic acid may thus be used against pathogen virulence, heavy metal stresses, salt stress, and toxicities of other elements. Applied salicylic acid improves photosynthesis, growth, and various other physiological and biochemical characteristics in stressed plants. Salicylic acid antagonizes the oxidative damaging effect of metal toxicity directly by acting as an antioxidant to scavenge the reactive oxygen species and by activating the antioxidant systems of plants and indirectly by reducing uptake of metals from their medium of growth. We review here the use of exogenous salicylic acid in alleviating bacterial, fungal, and viral diseases, heavy metal toxicity, toxicity of essential micronutrients, and salt stress.
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