Simple modifications of nicotinic, isonicotinic, and 2,6-dichloroisonicotinic acids toward new weapons against plant diseases

Abstract

Recently, the biggest challenge in agriculture is the search for new, effective, and ecological methods of protecting plants against diseases. One of the fastest-growing and prospective strategies is a method based on activating the plant’s natural defenses. The use of suitable substances (elicitors) stimulates the immune system of plants, which makes them resistant to infections even before the first symptoms appear. This article presents preparation, characterization, phytotoxicity, and plant resistance induction efficacy of 28 ester derivatives of nicotinic, isonicotinic, and 2,6-dichloroisonicotinic acids as potential inducers of plants’ natural immune system. Plant resistance induction efficacy tests were performed on tobacco Nicotiana tabacum var. Xanthi infected by the tobacco mosaic virus (TMV).

New biologically active ionic liquids with benzethonium cation‐efficient SAR inducers and antimicrobial agents

“…Our tests showed that this compound surprisingly reduced the area of necrotic spots by 61%. Its chemical structure is similar to those of known plant resistance inducers containing a phenyl ring and carboxyl group, such as BTHCOOH and nicotinic acid 15,49 . To our knowledge, this is the first report indicating the use of an antimicrobial agent as a SAR inducer.…”

“…Its chemical structure is similar to those of known plant resistance inducers containing a phenyl ring and carboxyl group, such as BTHCOOH and nicotinic acid. 15,49 To our knowledge, this is the first report indicating the use of an antimicrobial agent as a SAR inducer. Certainly, this has to be proved with appropriate molecular studies indicating changes in the expression of SAR-specific genes.…”