The plant immunity inducer pipecolic acid accumulates in the xylem sap and leaves of soybean seedlings following Fusarium virguliforme infection

l‐lysine metabolism to N‐hydroxypipecolic acid: an integral immune‐activating pathway in plants

“…; Garcia‐Seco et al ., ). Significantly, many studies showed that Pip strongly accumulates in response to phytopathogens in the leaves of different plants, for example in rice infected with the blast fungus Magnaporthe oryzae , in virus‐infected tobacco ( Nicotiana tabacum ), potato and soybean (Pálfi and Dészi, ; Ádám et al ., ), in Arabidopsis and tobacco inoculated with the bacterium Pseudomonas syringae (Návarová et al ., ; Vogel‐Adghough et al ., ) and in soybean infected with the fungi Rhizoctonia solani and Fusarium virguliforme (Aliferis et al ., ; Abeysekara et al ., ).…”

“…For example, among more than 20 different amino acids analyzed in petiole exudates collected from Arabidopsis leaves, Pip was the only one that was found enriched in the exudates in the course of P. syringae infection (Návarová et al ., ). Additionally, Pip was detected in the phloem sap of cucumber (Hu et al ., ), and its levels significantly increased in the xylem sap of soybean plants infected with the fungus F. virguliforme (Abeysekara et al ., ), indicating its potential to move through the plant vasculature. Also, NHP has been directly implicated in long‐distance transport, because infiltration of lower rosette leaves of Arabidopsis wild type or fmo1 with NHP was sufficient to induce resistance responses in the upper leaves (Chen et al ., ).…”

Functions of pipecolic acid on induced resistance against Botrytis cinerea and Pseudomonas syringae pv. tomato DC3000 in tomato plants

“…Pip, a non‐proteinaceous product of lysine catabolism, acts as an important regulator of plant immunity. The level of Pip in plants can be induced by pathogen infection such as Pst DC3000 (Abeysekara, Swaminathan, Desai, Guo, & Bhattacharyya, 2016; Hartmann et al., 2017; Navarova et al., 2012), and Pip is associated with SAR (Chen et al, 2018; Navarova et al., 2012). The exogenous application of Pip via the soil increased resistance to Pstb in tobacco (Vogel‐Adghough et al., 2013).…”

Identification of candidate resistance metabolites to <em>Leifsonia xyli</em> subsp. <em>xyli</em> in sugarcane through metabolomic profiling

“…Determining how these metabolites act on Lxx development is necessary for validating the metabolomics results. Unlike previous studies on other pathogens where growth imparement and virulence reduction was observed (Abeysekara et al 2016;Li et al 2015;Velasco et al 2013;Báidez et al 2007), adding phenolics to Lxx culture medium resulted only in a moderate inhibition, indicating that an optimized methodology should be developed.…”

“…Rutin and luteolin-7-glucoside were effective on growth inhibition of Verticillium dahlia, a fungal pathogen that infects the vascular system of olive trees (Báidez et al 2007). The vascular pathogen Fusarium virguliforme induced the accumulation of isoflavones and isoflavonoids phytoalexins in the xylem in soybean plants (Abeysekara et al 2016). In our previous study, the comparative metabolomic profiling of a resistant and a susceptible variety to Lxx identified some phenolics that were more abundant in the resistant variety, suggesting a possible role in restricting the growth of the pathogen.…”