Journal of Food, Agriculture and Environment

Author(s):

Mohammad Magdy El-Metwally, Abeer Abd elwahab Ali, Ehsan Mohammad Rashad, Sahar Ebeid Abo-Neima

Received date: 2019-11-11 Accepted Date: 2019-12-10

Abstract:

Phaseolus vulgaris is one of very important crops and the associated seed-borne fungi, especially Rhizoctonia solani, have a negative effect on the plant growth and yield. The present study deals with the impact of Co, Fe and Ni monometallic nanoparticles in control of P. vulgaris seed-borne fungi, especially R. solani, and also  the resistance and growth improvment of P. vulgaris. Practically, germination of P. vulgaris seeds significantly increased after treatment with Co by 17.95 and 24.93% over the control at 50 and 100 ppm, respectively, followed by Fe (20.97%) and Ni (16.54%) at 100 ppm. Seed-borne fungi Aspergillus flavus and Penicillium spp. were not affected by any of tested monometallic nanoparticles, whereas both concentrations of the three tested monometallic nanoparticles led to complete absent of Fusarium verticillioides, Fusarium chlamydosporum and Sclerotinia sclerotiorum. Co and Ni at 100 ppm led to 63.33 and 45.56% reduction in linear growth of R. solani, respectively. Under greenhouse, 100 ppm of  Co, Fe and Ni showed significant decrease in disease severity and disease incidence with increase in all growth parameters of P. vulgaris. After two seasons field study, Ni monometallic nanoparticles showed significant reduction in percentage of seeds rot and infected plants with physiological increase in total phenols, peroxidase and polyphenol oxidase as well as photosynthetic pigments. These findings declare the high impact of the three tested monometallic nanoparticles, especially Ni, in control of R. solani and enhancement the resistance and growth parameters of P. vulgaris 

Keywords:

Co, Fe, Ni, monometallic nanoparticles, seed-borne fungi, Rhizoctonia solani