engleski

Effect of increased temperature on Arabidopsis thaliana, Brassica rapa and Solanum lycopersicum seedlings

Temperature is one of the major parameters influencing plant life alongside relative humidity and light. It varies geographically and changes with time. Here, the effect of heat stress on growth and physiology of model plant Arabidopsis thaliana (thale cress), and two globally important crop species, Solanum lycopersicum (tomato) and Brassica rapa (chinese cabbage) was investigated. Seedlings were exposed to a moderate elevated temperature of 37 °C, a temperature common for the summer season in the Mediterranean, and to a severe elevated temperature of 45 °C. This extreme temperature regime was chosen based on literature data and the highest recorded temperature in Croatia [1, 2]. Timeframes of seedling survival at such an extreme condition were evaluated. In heat treated seedlings, prolin content and levels of lipid peroxidation were measured. Both parameters show an increase in heat treated seedlings in comparison to controls. As a consequence of global warming, environmental temperatures have risen in recent years and continue to do so. Thus, these results, together with previous research, will provide a clearer picture of heat tolerance and response in plants.

Heat stress ; Arabidopsis thaliana ; Brassica rapa ; Solanum lycopersicum

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