Response of Triticum aestivum (L.) Plants Grown Under Cadmium Stress to Polyamines Pretreatments
Year: 2016
Type: article
Abstract: The role of exogenously-applied polyamines [i.e., spermine (Spm), spermidine (Spd) and putrescine (Put)] in the improvement of cadmium (Cd2+) tolerance in wheat plants, and their effects on growth, yield and its components and changes in the osmoprotectant and endogenous Cd2+ concentrations and the contents of some nutrients in plants grown under 2.0 mM Cd2+ stress were assessed. The efficiency of wheat plants to tolerate Cd2+ stress in terms of growth and yield characteristics was noticed to varying degrees with the three applied polyamines. The reasonable growth of Cd2+-stressed seedlings and consequently acceptable grain yield was correlated with the improvements in the concentrations of osmoprotectants and tissue health in terms of relative water content (RWC) and membrane stability index (MSI), and reductions in electrolyte leakage (EL) and tissue Cd2+ concentration. Results show that, seed soaking in 0.25 mM Spm, 0.50 mM Spd or 1.0 mM Put generated significant better growth and yield characteristics, MSI, RWC, leaf photosynthetic pigment and osmoprotectant concentrations, and nutrient contents than seed soaking with water under 2.0 mM Cd2+ stress. In contrast, the Cd2+ concentration and EL were significantly reduced. However, the Cd2+-free control was the best treatment when compared to the all other stressed treatments. Seed soaking in 1.0 mM Put was the best, generating wheat plants that most tolerant to Cd2+ stress than those generated from the other two polyamines. Therefore, this study recommend to use the 1.0 mM Put, as seed soaking treatment for wheat to grow well under Cd2+ stress.
Source: Plant
Author: Mostafa Mohamed Rady
Institution: Fayoum University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2547782876