| Autor: |
Prasad TNVKV; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Swethasree M; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Satisha GC; Ministry of Agriculture & Farmers Welfare, Government of India, ICAR-Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore, Karnataka 560 089, India., Nirmal Kumar AR; Department of Crop Physiology, S.V. Agricultural College, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Sudhakar P; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Ravindra Reddy B; Department of Statistics & Computer applications, S.V. Agricultural College, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Saritha M; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Sabitha N; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Bhaskar Reddy BV; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Rajasekhar P; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Prasanthi L; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Girish BP; Regional Agricultural Research Station, Institute of Frontier Technology, Acharya N G Ranga Agricultural University, Tirupati 517502, Andhra Pradesh, India., Roy Choudhury S; Department of Biology, Indian Institute of Science Education and Research, Tirupati 517501, Andhra Pradesh, India. |
| Abstrakt: |
In recent years, foliar applications of nanoparticles are increasingly being employed in agricultural fields as fertilizers to enhance crop yields. However, limited studies are available on the foliar uptake of nanoscale nutrients and their interaction with plants. In this study, we reported the effects of foliar spray with varied concentrations of nanoscale silica (N-SiO 2 ) and bulk tetraethyl orthosilicate (TEOS at 2000 ppm) on the growth and yield of groundnut. Nanosilica was prepared by a sol-gel method and characterized by transmission electron microscopy, dynamic light scattering, and X-ray diffraction. The size and zeta potential of N-SiO 2 were found to be 28.7 nm and 32 mV, respectively. The plant height, number of branches, total dry weight, SPAD chlorophyll meter reading, photosynthetic rate, water use efficiency, number of nodules, and ascorbic acid content were increased significantly with the N-SiO 2 foliar application at 400 ppm over control. The number of filled pods increased significantly by 38.78 and 58.60% with N-SiO 2 at 400 ppm application over TEOS and control, respectively. The pod yield per plant in N-SiO 2 at 400 ppm increased by 25.52 and 31.7% higher over TEOS and control, respectively. Antioxidant enzyme activities enhanced significantly in N-SiO 2 at 200 and 400 ppm over control, indicating a stimulatory effect on the plant growth. In addition, confocal microscopy revealed that fluorescein isothiocyanate (FITC)-N-SiO 2 entered through stomata and then transported to vascular bundles via apoplastic movement. Our study for the first time demonstrated that N-SiO 2 can significantly modulate multiple complex traits in groundnut through an eco-friendly and sustainable approach. |
