Effect of Biosynthesized Nanoselenium on Controlling Tomato Root-Knot Nematode Meloidogyne incognita

Author:

Daoush Asmaa Sh. M.12,Hendawey Mohamed H.2,Yaseen Rabaa3,El-Nuby Ahmed S. M.4,Bedair Tarek M.5ORCID,Alwutayd Khairiah Mubarak6ORCID,Al-Hoshani Nawal6ORCID,Shaaban Ahmed7ORCID,Bashir Anum1,Li Lin1ORCID

Affiliation:

1. National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China

2. Biochemistry Unit, Genetic Resources Department, Ecology and Dry Lands Agriculture Division, Desert Research Center, Cairo 11753, Egypt

3. Soil Fertility and Microbiology Department, Water Resources and Desert Soils Division, Desert Research Center, Cairo 11753, Egypt

4. Plant Protection Department, Ecology and Dry Lands Agriculture Division, Desert Research Center, Cairo 11753, Egypt

5. Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt

6. Biology Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia

7. Agronomy Department, Faculty of Agriculture, Fayoum University, Fayoum 63514, Egypt

Abstract

Tomato is a globally important fruit crop, which is easily susceptible to infection by plant-parasitic nematodes during growth. In this study, selenium nanoparticles were biosynthesized through the selenite reduction pathway in a wild-type Pseudomonas stutzeri BB19 and were characterized by uniform nanostructured needle-like forms with an average size of 95.2 nm. The nematicidal effect of biosynthesized selenium nanoparticles (BioSeNPs) at different concentrations (2, 6, and 10 ppm) during the pre- or post-infection of tomato root-knot nematode (RKN), Meloidogyne incognita, was assessed under greenhouse conditions. The BioSeNPs were applied as a foliar spray or a soil drench, compared to ethoprophos nematicide (100 mL/pot). The results showed that the ethoprophos nematicide significantly reduced the number of galls, egg mass, and eggs/egg mass of M. incognita by 94.2, 92.8, and 49.8%, respectively. BioSeNPs, as foliar sprays, significantly reduced the number of galls in post-treated infected tomato plants at 10 ppm and in pre-treated infected tomato plants at 2 ppm by 91.9 and 91.4%, respectively. Concerning the egg mass, BioSeNPs significantly reduced it in pre-treated infected tomato plants at 2 ppm as a foliar spray by 90.9%. Moreover, BioSeNPs significantly reduced the eggs/egg mass in pre-treated infected tomato plants at 2 ppm as a soil drench by 43.3%. On the other hand, the BioSeNPs considerably improved tomato growth, chlorophyll a and b, carotenoid content, and enzymes (i.e., catalase and peroxidase) activity compared to untreated infected tomato plants (negative control). Hence, the BioSeNPs show a significant application potential as a cost-effective and environmentally friendly biocontrol agent for RKN management in tomato plants.

Funder

National Natural Science Foundation of China

Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia

Publisher

MDPI AG

Subject

Agronomy and Crop Science

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