Early stages of plant ontogenesis in the environment treated by organic pollutant
| Authors | |
|---|---|
| Year of publication | 2011 |
| Type | Article in Proceedings |
| Conference | Ovzduší 2011 - Program a Sborník konference |
| MU Faculty or unit | |
| Citation | |
| Field | Physiology |
| Keywords | PAH fluoranthene; Pisum sativum; Zea mays; germination; biomass production; ethane; ethylene; |
| Description | The aim of this study was to evaluate the effect of polycyclic aromatic hydrocarbon fluoranthene and its increasing concentration (0.01, 0.1, 1, 4 and 7 mg/L) on germination of seeds and production of ethylene, ethane and carbon dioxide during germination, and early growth of seedlings in Pisum sativum and Zea mays. Whereas in maize the germination was significantly lowered already by 0.01 mg/L FLT (91% germination), in pea the significant decrease in germination was found in two orders of magnitude higher FLT concentration (1 mg/L; 93% germination). This could be related to higher lipid content in maize seeds. The most significant decrease in seed germination of both plant species were found in seeds treated by 7 mg/L FLT (78% germination in maize and 90% in pea). Root and shoot elongation is besides the seed germination a convenient indicator of the environmental phytotoxicity. Results proved an improvement of inhibition effect on both lenght and dry weight of roots and shoots in both plant species with increasing FLT treatment. Production of ethylene as an important growth regulator and ethane as a product of lipid peroxidation accompanies the seed germination in many plant species. Higher ethylene production was found in both species already in seeds exposed to the low FLT concentration (0.1 mg/L). Production of both gases increased with increasing FLT treatment. |
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