Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi !

The effect of tembotrione (HPPD-inhibiting herbicide) on photosynthetic efficiency of duckweed (<i>Spirodela polyrhiza</i> L.), a non-target species (CROSBI ID 682752)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa

Peršić, Vesna ; Antunović Dunić, Jasenka ; Domjan, Lucija The effect of tembotrione (HPPD-inhibiting herbicide) on photosynthetic efficiency of duckweed (<i>Spirodela polyrhiza</i> L.), a non-target species // Scientific symposium Soil Ecotoxicology - Theory and Application. 2019. str. 17-17

Podaci o odgovornosti

Peršić, Vesna ; Antunović Dunić, Jasenka ; Domjan, Lucija

engleski

The effect of tembotrione (HPPD-inhibiting herbicide) on photosynthetic efficiency of duckweed (<i>Spirodela polyrhiza</i> L.), a non-target species

Nowadays, pesticide application has become the dominant method for controlling pests and diseases in plant production and, in addition to other ecological problems, significantly contributes to the degradation of aquatic ecosystems where can affect non-target species. The goal of this investigation was to evaluate the effect of tembotrione (TBT), HPPD- inhibiting herbicide, in ecologically relevant concentrations on the free-floating macrophyte <i>Spirodela polyrhiza</i> L. Plants were exposed to the range of TBT concentrations from low, corresponding to concentrations predicted in the aquatic environment (30 ug a.u. l<sup>-1</sup>), to higher concentrations (300 ug a.u. l<sup>-1</sup>, 3 and 30 mg a.u. l<sup>-1</sup>). Chlorophyll fluorescence was used as a method of assessing the photosynthesis efficiency in response to stress conditions. By analysing the polyphase increase of chlorophyll fluorescence with OJIP test, after 24 hours of exposure to TBT, it was determined that TBT has a more pronounced effect on the young daughter fronds. In fully developed plants (mother- fronds), TBT induced a more significant effect on light-dependent reactions and a slight decrease of photosynthesis efficiency in combination with a smaller increase in non- photochemical energy dissipation per reaction centre. In young plants, it was found that dark reactions are more sensitive to the effect of TBT and that there is a significant increase in non- photochemical energy dissipation even at low concentrations of TBT. The results showed that treatment with tembotrione causes different and significant changes in electron transport in the active reaction centres of underdeveloped, but also of fully developed plants. Therefore, it can be concluded that energy flows and photosynthesis driving forces can generate useful information on the behaviour of photosystems of aquatic plants that can be used to determine the heterogeneity of photosystems in aquatic plants at different developmental stages and under stressful conditions. These results draw attention to the need for more investigations of toxic effects of pesticides on non-target organisms at both low or environmentally relevant concentrations and different development stages.

Chlorophyll fluorescence, toxicity, photosynthesis

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o prilogu

17-17.

2019.

objavljeno

Podaci o matičnoj publikaciji

Scientific symposium Soil Ecotoxicology - Theory and Application

Podaci o skupu

Scientific symposium Soil Ecotoxicology - Theory and Application

predavanje

27.06.2019-27.06.2019

Osijek, Hrvatska

Povezanost rada

Biologija