Physiological response of spruce seedlings (Picea abies Karst. [L.]) to coupled drought and aluminium stress | Fyziologická reakcia sadeníc smreka (Picea abies Karst. [L.]) na kombinovaný stres zo sucha a hliníka
2009
Slugeňová, K., Slovak Academy of Sciences, Zvolen (Slovak Republic). Institute of Forest Ecology | Ditmarová, Ľ., Slovak Academy of Sciences, Zvolen (Slovak Republic). Institute of Forest Ecology | Kurjak, D., Technical University in Zvolen (Slovak Republic). Faculty of Forestry | Váľka, J., Slovak Academy of Sciences, Zvolen (Slovak Republic). Institute of Forest Ecology
We studied influence of two stress factors - drought and aluminium on physiological state of four-year-old spruce plants. The research was realized in form of a pot experiment, in four replicates: control, drought, aluminium, and aluminium plus drought. Drought stress was simulated through totally excluded watering, and the proceeding dehydration was monitored by measuring needles water potential (MPa). Aluminium was applied in a single dose, in form of an AlCl3 solution with a concentration of 200 mg per l. During 6 weeks (44 days) we tested the response of needles water potential, chlorophyll fluorescence and gas exchange to the induced stress load. There were also evaluated changes in assimilatory pigments contents (mg per g DW) and free proline content (microg per g FW). The achieved results show that the studied stress factors infiuenced discussed physiological parameters. They demonstrate that there are numerous parallel changes to physiological and biochemical responses of plants exposed to abiotic stress; these changes may enhance the capabiIity of plants to survive and grow during stress periods.
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