Effect of 24-epibrassinolide on growth, yield, antioxidant system and cadmium content of bean (Phaseolus vulgaris L.) plants under salinity and cadmium stress
2011
Rady, Mostafa M.
The plants of Phaseolus vulgaris L. were grown in the presence of NaCl and/or CdCl₂ and were sprayed with 5μM of 24-epibrassinolide (EBL) at 15 days after transplanting (DAT) and were sampled at 30 DAT and at the end of experiment. The plants exposed to NaCl and/or CdCl₂ exhibited a significant decline in growth, the level of pigment parameters, green pod yield and pod protein. However, the follow up treatment with EBL detoxified the stress generated by NaCl and/or CdCl₂ and significantly improved the above parameters. The NaCl and/or CdCl₂ increased electrolyte leakage, lipid peroxidation and plant Cd²⁺ content, and decreased the membrane stability index (MSI) and relative water content. However, the EBL treatment in absence of the stress improved the MSI and relative water content and minimized plant Cd²⁺ content but could not influence electrolyte leakage and lipid peroxidation. The antioxidative enzymes and the level of proline exhibited a significant increase in response to EBL as well as to NaCl and/or CdCl₂ stress.
显示更多 [+] 显示较少 [-]