Document Type : Original research article
Authors
1 Horticulture Crops Research Department, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO, Isfahan, Iran
2 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran
Abstract
An experiment was carried out to determine the effects of chelated zinc and nanoscale zinc oxide particles on tolerance salinity of barley. In the experiment, barley seeds were treated with different concentrations of chelated zinc (Zn-Chelated) and nanoscale zinc oxide (Nano-ZnO), and the effects of these treatments on seed germination, seedling vigor, plant growth, grain filling, and yield were studied. The inhibitory effect of nanoparticles and chelated zinc (1.5 ppm) was discovered.The results emphasize that water can be supplied to the barley followed by Zn-Chelated application with 0.5 ppm to get the desired results. With increasing salinity stress, seed germination and seedling vigor decreased sharply, so the highest obtained from control treatment and the lowest obtained from a salinity level of 18 dS m-1. The genotypes respond differently to salinity levels and alkaline soils. It seems that the Khatam genotype has more tolerance to salinity conditions. Consequently, an experiment was conducted in a strip-plot design with three replications. Based on the correlation coefficients, the kernel number per spike (KNS) showed the highest correlation with the grain yield in barley genotypes, followed by grain filling rate (GFR), maximum grain weight (MGW), thousand-kernel weight (TKW), number of spikes (NS), and saturation water deficit (SWD), respectively. Thus, not only a higher KNS and TKW, but also GFR, MGW, and proline in aboveground plant parts are crucial for successful tolerance in barley. These findings indicate that these agrophysiological traits could be key factors and useful tools for screening many samples in a short time.
Highlights
- Barley seed germination and seedling vigor were significantly reduced by increasing salinity levels.
- Water followed by low-dose chelated zinc significantly enhanced barley germination, shoot and root length, and seedling vigor compared to other treatments.
- Chelated zinc application reduced the negative effects of salinity on barley growth and yield.
- Higher nanoscale zinc oxide concentrations inhibited plant growth, emphasizing the need for proper zinc source and concentration.
- Salinity increased barley leaf proline content, suggesting a stress response mechanism.
- Chelated zinc application improved plant water status under salinity stress by reducing saturation water deficit.
Keywords
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