Effective microorganisms modify protein and polyamine pools in common bean (Phaseolus vulgaris L.) plants grown under saline conditions
- Citation:
- Talaat, N. B., "Effective microorganisms modify protein and polyamine pools in common bean (Phaseolus vulgaris L.) plants grown under saline conditions", Scientia Horticulturae, vol. 190, pp. 1 - 10, 2015.
Abstract:
Abstract No information is available regarding the influence of effective microorganisms (EM) on protein synthesis and polyamine balance in plants grown under saline conditions. Thus, as a first approach, this study sheds light on some different mechanisms that may protect EM-treated plants against salt excess. The response of common bean (Phaseolus vulgaris L.) cv. Nebraska to soil salinization [0.1 dS m?1 (non-saline), 2.5 and 5.0 dS m?1] and/or \{EM\} application was investigated. Plants grown in saline soils exhibited a significant decline in productivity, membrane stability index, nitrate reductase activity, nitrate and protein content, K+ concentration, and K+/Na+ ratio. However, \{EM\} application ameliorated the deleterious effects of salinity and significantly improved the above parameters. Soil salinity induced oxidative damage through increased lipid peroxidation and hydrogen peroxide content. \{EM\} application significantly reduced the oxidative damage. Polyamines responded to salinity stress by increasing its content, particularly putrescine level. The \{EM\} treatment changed the polyamine balance under saline conditions, a high increase in spermidine and spermine levels was observed. Moreover, \{EM\} application significantly reduced the activities of diamine oxidase and polyamine oxidase in salt-stressed plants. Both the modulation of polyamine pool and the regulation of protein synthesis can be one of the most important mechanisms used by EM-treated plants to improve plant adaptation to saline soils.
Notes:
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