Negative effects of fluoranthene on the ecophysiology of tomato plants (Lycopersicon esculentum Mill)

Combined effects of cadmium and fluoranthene on germination, growth and photosynthesis of soybean seedlings

“…These results are in agreement with previous reports on effects of treatment with Cd or FLT on photosynthetic light reactions of soybean and other plants (Moya et al, 1993;Ghorbanli et al, 2000;Oguntimehin et al, 2010;Ahammed et al, 2012).…”

“…Gas exchange parameters such as net photosynthetic rate (Pn), stomatal conductance (Gs) and intercellular CO 2 concentration (C i ) represent photosynthetic capacity, and thereby are often used to determine the influence of stresses on photosynthesis. Both Cd and FLT did result in inhibition of photosynthesis, which is consistent with the results observed in other studies (Moya et al, 1993;Váňová et al, 2009;Oguntimehin et al, 2010). A lower G s value might be a consequence of stomatal closure, which is an important stress avoidance mechanism in plants (Poschenrieder et al, 1989).…”

“…Similar results were obtained in soybean (Ghorbanli et al, 2000), rice (Moya et al, 1993) and garlic (Liu et al, 2003) stressed by cadmium. Inhibition of growth by FLT and other PAHs was also observed in previous studies (Kummerova and Kmentova, 2004;Váňová et al, 2009;Oguntimehin et al, 2010;Kummerová et al, 2013). Owing to its highly lipophilic nature, FLT can interact with biological membranes leading to changes in their structure and function, which, in turn, could impair growth and metabolic activity of cells (Sikkema et al, 1994).…”

“…It has been reported that Cd inhibited production of chlorophyll by obstructing the formation of the protochlorophyllide reductase ternary complex and synthesis of 5-aminolaevulinic acid (Huang et al, 1997). Fluoranthene or its photolysis products can generate reactive oxygen species inside plant cells, and thereby initiate lipid peroxidation (Oguntimehin et al, 2010), but it is not clear now whether the reduction of Chla and Chl-b is due to their destruction or reduction of their synthesis.…”

“…Fluoranthene (FLT) is a typical PAH that is ubiquitous and widespread in the environment (Bryselbout et al, 2000). It can also enter plant tissues by uptake through the roots from contaminated soils and can then be moved into shoots (Oguntimehin et al, 2010). Effects of FLT on higher plants have been fluorescence.…”