Effect of heat-shock pre-treatment on tomato plants infected by powdery mildew fungus

Abstract

Citation: Nožková V., Mieslerová B., Luhová L., Piterková J., Novák O., Špundová M., Lebeda A. (2019): Effect of heat-shock pre-treatment on tomato plants infected by powdery mildew fungus. Plant Protect. Sci., 55: 31-42. Abstract:The effect of plant heat-shock (HS) pre-treatment (40.5°C, 2 h) on Pseudoidium neolycopersici development in the susceptible and moderately resistant Solanum spp. genotypes was studied together with biochemical responses (endogenous concentrations of salicylic (SA), jasmonic (JA), abscisic acid (ABA), and peroxidase (POX) activity). In HS pre-treated S. lycopersicum, an acceleration of pathogen, chlorosis and necrosis development, strong SA, JA accumulation, and increased POX activity were detected. In S. chmielewskii, HS pre-treatment caused a slight suppression of pathogen development, increase in JA, ABA concentrations, and POX activity. HS accelerated and strengthened the development of symptoms and biochemical responses to the infection in the susceptible genotype in contrast to moderately resistant genotype with a robust defence response to an infection per se.

Heat shock‐induced enhanced susceptibility of barley to Bipolaris sorokiniana is associated with elevated ROS production and plant defence‐related gene expression

“…In addition, a heat shock pre‐treatment at 40.5 °C for 2 h accelerates development of the powdery mildew pathogen Pseudoidium neolycopersici in tomato (Nožková et al . 2019). In contrast, heat shock (50 °C for 60 s) induced resistance in barley cv.…”

Thermo-Priming Mediated Cellular Networks for Abiotic Stress Management in Plants

“…High temperature stress results in various impairments including early leaf senescence, accumulation of ROS, reduced germination, decreased rate of photosynthesis, inhibition of root growth, lower seed set, reduced vigor and elevated rates of lipid peroxidation, protein denaturation, spikelet sterility and anther indehiscence (Wahid et al, 2007;Hasanuzzaman et al, 2013;Rodríguez et al, 2015;Narayanan et al, 2016;Iqbal et al, 2017;Ohama et al, 2017;Ali et al, 2020). Sustainable agriculture necessitates the adaptation of strategies to boost plant responses to improve their tolerance to these stresses.…”

“…The responses to HTS and thermo-priming are transduced through the MAP kinase pathway to induce the translation of HSFs, which are prime regulators of plant response (Zhang et al, 2016b). HSFs are a conserved family of TFs that bind directly to heat shock elements (HSEs) to control HTS-related gene expression (Ohama et al, 2017). The HSEs consist of tandem inverted repeats of the pentameric consensus sequence nGAAn (nTTCnnGAAnnTTCn) and the AGGGG motifs (Swindell et al, 2007;von Koskull-Döring et al, 2007).…”