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Temporal variations in physiological responses of Kandelia obovata seedlings exposed to multiple heavy metals. | LitMetric

AI Article Synopsis

Article Abstract

A study was conducted to quantify temporal variations in physiological responses of Kandelia obovata under multiple heavy metal stress. The results showed that plant growth was not significantly affected by multiple heavy metal stress during the 120-days experiment. At the start, levels of net photosynthetic rate (P), stomatal conductance (G) and transpiration rate (T) showed effects of "low-promotion, high-inhibition", but P and G reduced with increasing heavy metal stress at the end. Temporary lipid oxidation was shown by high levels of malondialdehyde (MDA) under high heavy metal stress at the start but was unaffected at the end of the experiment. MDA negatively correlated with biomass and photosynthetic parameters and acted as a sensitive indicator. Proline also shared similar trend and indicated its temporary role in osmotic adjustment. Negative correlations between osmotic adjustment matter and photosynthetic parameters further confirmed the significant role of osmotic adjustment under heavy metal stress.

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http://dx.doi.org/10.1016/j.marpolbul.2017.03.060DOI Listing

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