Vol. 4, Issue 6 (2019)
Moderation of water deficit stress-induced damages by the application of silver nano particles and indole butyric acid foliar spray in maize
Author(s): Athar Javaid, Sami Ullah, Muhammad Younas, Rehman Ullah
Abstract: Drought is a persistent and intricate natural vulnerability whose rate of recurrence and enormity is expected to increase with climate change. Regardless of progress in response and adaptation to water scarcity (with the development of new policies), drought continues to cause severe impacts and affiction. Therefore, the present findings have focused on the calculation of the impact of silver nanoparticles (Asp-AgNP) and indole butyric acid (IBA) on the physiological mechanism of water deficiency tolerance in a special maize variety, i.e Sarhad yellow under induction of 7 and 10 days of drought at vegetative stage. The maize seeds (Sarhad yellow) of the CCRI, Persabaq Nowshera were collected and sown in triplicate in specific diameter clay pots, in an experimental house located in the botanical department of the University of Peshawar. The nanoparticles were analyzed by scanning electron microscopy (SEM), the dispersive energy X-ray spectroscopy (EDX) confirmed the size of the 73–166nm nanoparticles with thick surfaces. TGA (thermogravimetric analysis) and differential thermal analysis (DTA) showed a significant reduction in endothermic mass and a greater exothermic appearance. Drought stress has reduced the agronomic and physiological characters counting the content of chlorophyll "a", "b", carotenoids and proteins together with peroxidase (POD). Asp-AgNP was more effective with a minimum of 7 days of drought, which improves the physiological attribute alone and in combination with IBA compared to the condition of maximum drought stress. It is hereby accomplished that the inhibitory effect of short-term water deficit stress has been improved by the exogenous application of Asp-AgNP and IBA foliar spray, but yield loss via long term osmotic stress will not be encountered using growth regulators and nanoparticles. Climate smart agriculture is the only way to overcome the problems created by the long-term exposure of cereal crops to climate change, including water deficit stress.