Paper-based electroanalytical devices for in situ determination of free 3-indoleacetic acid and salicylic acid in living Pyropia haitanensis thallus under various environmental stresses

Metabolic Adjustment of High Intertidal Alga Pelvetia canaliculata to the Tidal Cycle Includes Oscillations of Soluble Carbohydrates, Phlorotannins, and Citric Acid Content

“…Moreover, pretreatment with salicylic acid was shown to improve thermotolerance of the brown and red seaweeds due to activation of the enzymes contributing to antioxidative defense and stabilizing the content of reactive oxygen species in cells [ 52 , 53 ]. Wang et al [ 51 ] showed that in the cells of N. haitanensis , biosynthesis rate and content of salicylic acid increased sharply in an hour after beginning the exposure to high temperature, desiccation, and high light, but returned to the initial level after 6 h of treatment. This coincides with our data: in P. canaliculate , salicylic acid content grows dramatically in the beginning of the waterless period (LW phase), but then drops down in progression of the air exposure (RT phase) ( Figure 8 and Figure 10 ).…”

“…Salicylic acid can be synthesized via two independent pathways, operated by isochorismate synthase or phenylalanine ammonia lyase (PAL) as the key enzymes. Both these routes are supposed to occur in the vascular plants and algae, though their relative contributions to the level of this hormone in the cells vary considerably in different species [ 51 , 56 , 57 ]. The key intermediate of PAL-dependent biosynthesis of salicylic acid is phenylalanine, and in P. canaliculata , accumulation of this amino acid precedes the spike of salicylate during the tidal cycle ( Figure 8 and Figure 10 ).…”

“…Salicylic acid is a biologically active compound of phenolic nature, known as a signal molecule, involved in the induction of diverse adaptive reactions to abiotic and biotic stresses in both vascular plants and algae [48][49][50]. Thus, in the red macrophyte Neoporphyra haitanensis expression level of the genes related to the salicylate biosynthesis and content of endogenous salicylic acid increased considerably after exposure to high temperature, high light, desiccation, and ultraviolet irradiation [49,51]. Moreover, pretreatment with salicylic acid was shown to improve thermotolerance of the brown and red seaweeds due to activation of the enzymes contributing to antioxidative defense and stabilizing the content of reactive oxygen species in cells [52,53].…”

Review—Novel Trends in the Determination of Pharmaceutical Compounds Commonly Found in Topical Treatments using Electrochemical Sensing Approaches

“…47 Wang's team developed paper-based electroanalytical devices (PADs) based on oxygen plasma-treated MWCNTS-modified carbon tape electrodes, which presents the advantage of using sample volume in the microliter range, comparable to that of microfluidic systems. 48 Liu et al developed an interdigitated microelectrode array based on core-shell Au@Cu 2 O-graphene-polydopamine nanoparticles (Au@Cu 2 O-Gr-PDA IDME array sensor). The study revealed a wide linear concentration range and a low LOD as well as a one-step manufacturing process for the core-shell Au@Cu 2 O-Gr-PDA nanostructure.…”

Potential of nanobiosensor in sustainable agriculture: the state-of-art

“…The detection limit of this system is 18.5 nmol/L for cadmium and 25.6 nmol/L for lead ( Wang et al., 2019 ). Some other electrochemical biosensors were also present that can detect the phytohormones under different stress conditions ( He et al., 2020 ; Wang et al., 2020 ; Cao et al., 2019 ). Surface plasmon resonance-based ABA detection was also developed with a limit of detection of 0.33 μM.…”