Effects of Elevated Temperature and Salicylic Acid on Heat Shock Response and Growth of Potato Microplants

Potato is a globally important, highly heat-susceptible crop species. We investigated the effects of prolonged exposure to elevated temperatures and exogenous salicylic acid (SA) on microplant growth heat-shock response (HSR) in three unrelated potato genotypes/cultivars. Long-term 29 °C (mild heat stress) caused significant reduction number surviving explants shoot morphometric parameters heat-sensitive genotypes, while 26 (warming) only decline growth. Interestingly, °C-temperature treatment stimulated root some indicating difference between favorable for SA showed protective effect regarding at °C. At °C, this was genotype-dependent. did not affect roots inhibited elongation all temperature treatments, responses applied concentration. Although HSR mainly considered rapid short-lived, transcript levels most HSFs HSPs were detected after weeks stress. Besides, two StHSFs StHSP21 expression extreme heat-susceptibility significance during warming. minor alterable.