This paper proposes a modified model based on the PROSPECT-5 model to simulate the spectral reflectance of copper-stressed leaves. Compared with PROSPECT-5, the modified model adds the copper content of leaves as one of input variables, and the specific absorption coefficient related to copper (Kcu) was estimated and fixed in the modified model. The specific absorption coefficients of other bio...

Heavy metals are the cause of major abiotic stresses in plants and a principal contributor to environmental pollution in recent decades. This study investigated the effects of exogenous hydrogen sulfide on the ascorbate-glutathione cycle in the leaves of coriander seedlings under copper stress. Results showed that copper stress not only reduced APX and GR activities but also decreased leaf AsA,...

  Heavy metals are the cause of major abiotic stresses in plants and a principal contributor to environmental pollution in recent decades. This study investigated the effects of exogenous hydrogen sulfide on the ascorbate-glutathione cycle in the leaves of coriander seedlings under copper stress. Results showed that copper stress not only reduced APX and GR activities but also decreas...

melissa (melissa offcinalis l.), a member of a lamiaceae family, is a medical plant. the main most important pharmacological properties can be soothin, strengthening nerve, carminative and memory booster. the presence of heavy metals is one of important environmental stresses that can reduce growth and production of types of reactive oxygen. in the present study, the effect of copper sulfate (c...

doi: 10.1111/j.1399-3054.2007.00879.x The most abundant copper proteins in green tissues are plastocyanin (PC) in thylakoids and copper/zinc superoxide dismutase (Cu/ZnSOD) of which the major isoforms are found in the cytosol and in the chloroplast stroma. An iron superoxide dismutase (FeSOD) can also be found in the stroma. The expression of superoxide dismutases (SODs) has been studied mainly...

Dissolved organic matter (DOM) is a universal part of all aquatic systems that largely originates with the decay of plant and animal tissue. Its polyelectrolytic and heterogeneous characters make it an effective metal-complexing agent with highly diverse characteristics. Microbes utilize DOM as a source of nutrients and energy and their enzymatic activity may change its composition, thereby alt...

Copper has been reported to be an essential part of the enzyme tyrosinase prepared from various plant and insect sources (l-8). In the case of potato tyrosinase, Kubowitz (1, 2) found that the enzyme could be inhibited by reagents which combine with copper, e.g. diethyldithiocarbamate, salicylaldoxime, and carbon monoxide. He demonstrated that treatment of the enzyme with cyanide followed by di...

Recently the role of nitrogen monoxide (NO) in iron homeostasis has been proved by means of exogenously-applied different NO donors that can provoke leaf re-greening under conditions of iron deficiency. It was also supposed, that Fe-deficiency itself could stimulate the endogenous production of NO in stressed plants (Graziano and Lamattina, 2007). In this study, the comparison between effects o...