Physiological alterations of Salvinia natans L. exposed to aluminium stress and its interaction with polyamine

Abstract

In the present Investigation Salvinia natans L exposed to increasing concentration of Al stress and its interaction with polyamine was discussed. Among the physiological attributes Glutathione-S-transferase, glutathione peroxidase activities were up regulated against control. At transcript level glutathione peroxidase was also shown by over-expressed manner to support the lyses of peroxide. However, the application of Put had minimized these activities with same way to establish the role of polyamine under metal stress. In secondary metabolites synthetic pathway phenyl alanine ammonia lyase recorded a steady increase although the concentration of Al. Not only a single fraction of polyamine was responsible under Al stress but also pool of conjugated polyamine was up regulated. In oxidation of polyamine the activity of diamine oxidase (DAO) was more under metal stress to induce accumulation H2O2. In compensation for cellular depletion of reduced glutathione, dihydro ascorbate reductase activity was up regulated in plant under stress. At cellular level plants were distinctly marked with variations in heat shock proteins and established as a possible biomarker for Al toxicity. The study possibly established the affectivity in biomonitoring of Al in field condition with exercise cellular responses of Salvinia plants.

Responses of <i>Salvinia</i> plant as possible bioindication to Al toxicity and its interaction with putrescine

“…In case of angiospermic species the toxicity is most vulnerable in roots impairing its physiological activities. However, Al behaves as a pro-oxidant inducing the oxidative stress by changing the normal cellular redox (Mandal et al 2013a). The results have been in succession for the assessment of resistance or tolerance to Al irrespective of plant species and thus selection and potential use of such species for remediation sets the goal (Mandal et al 2013b).…”

“…Salvinia may be sited as a potential hyper accumulator species of Al with its possible metabolic profiling. Al induced water stress and its inherent oxidative exposure has been found to be adjusted by plants potentials to tolerate the metals (Mandal et al 2013a). Still, the other metabolic paths which constitute the cellular integrity like carbohydrate and nitrogen metabolism have not been dealt earlier with those.…”

“…Carbohydrate and nitrogen metabolism are of those predominant area that are to be dealt with Al tolerance in relation to bioaccumulation of the metal. In aquatic species few reports are also available where modification of different metabolic pools could supersede the normal metabolic rate when exposed to Al toxicity (Mandal et al 2013a;2013b). Photosynthetic rate of plant and the effect on it with metal toxicity could be measured by analyzing the carbohydrate metabolism and related enzymes.…”