The effect of spraying multi-walled carbon nanotubes and nano potassium fertilizer on the content of proline, abscisic acid, and chlorophyll in the leaves of the Vigna radiata plant under water stress

Department of Biology , College of Education for Pure Science , University of Kerbala Corresponding authors

Abstract

    To investigate the effects of spraying complex nano potassium fertilizer and multi-walled carbon nanotubes, as well as their interactions, on the content of proline, abscisic acid, and chlorophyll content in the leaves of Vigna radiata plants growing under water stress conditions in sandy loam soil during the winter of 2023–2024, a pot experiment was conducted at the College of Agriculture, University of Kerbala. experiment consisted of three components: involved applying complex nano potassium fertilizer at concentrations of 0, 2, and 4 g per liter-1; the second involved applying of multi-walled carbon nanotubes at concentrations of 0 and 0.1 g L-1 ,the third was irrigation at two levels 50% and 100% of soil's field capacity .The experiment followed a completely randomized design (C.R.D.) with four replications, the factorial experiment includes (48) experimental units. The results of the study showed a significant decrease in the activities of proline and abscisic acid and a significant increase in the chlorophyll content of the leaves when spraying with complex nano-potassium fertilizer and multi-walled carbon nanotubes and their interactions when irrigating at a level of 100% of the field capacity value of the soil, While the opposite was shown when irrigating at 50% from the field capacity value of the soil. The results showed an increase in the concentration of
proline and abscisic acid, while the chlorophyll content decreased at the level of 50% of the field capacity value of the soil at (S 1 ).