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. 2022 Sep 9:13:992535.
doi: 10.3389/fpls.2022.992535. eCollection 2022.

Nano-iron oxide accelerates growth, yield, and quality of Glycine max seed in water deficits

Dipanjoli Baral Dola  1 , Md Abdul Mannan  1 , Umakanta Sarker  2 , Md Abdullah Al Mamun  1 , Tofazzal Islam  3 , Sezai Ercisli  4 , Muhammad Hamzah Saleem  5 , Baber Ali  6 , Oana Lelia Pop  7 , Romina Alina Marc  8
Affiliations

Nano-iron oxide accelerates growth, yield, and quality of Glycine max seed in water deficits

Dipanjoli Baral Dola et al. Front Plant Sci. .

Abstract

Drought is one of the most destructive abiotic stresses that impact the growth, physiology, yield, and nutritional quality of seeds of crop plants. In modern agriculture, the use of nanoparticles can be beneficial due to their large surface area and higher potentiality to enter into the plant leaf during foliar application. This study aims to evaluate the effects of foliar spray containing varying doses (0, 100, and 200 ppm) of the nano-iron (Fe3O4) on the growth, physiology, yield, and seed nutritional quality of soybean under drought (40% of field capacity, FC) and well-watered (80% of FC) conditions. Leaf water status, chlorophyll content of leaves, the height of the plant, fresh leaf weight, fresh stem weight, fresh petiole weight, total dry weight, seed yield, and protein and oil content in soybean seeds were found to be suppressed by the applied drought stress. Under both drought (40% of FC) and controlled well-watered (80% of FC) conditions, the foliar application of nano-iron substantially improved the growth, physiology, yield, and quality of soybean seeds. The nanoparticles at 200 ppm increased soybean seed yield by 40.12 and 32.60% in drought and well-watered conditions, respectively, compared to the untreated plants. Furthermore, nano-iron increased the oil content of soybean seeds by 10.14 and 7.87% under drought and well-watered conditions, respectively, compared to the untreated control. Our results indicate that the application of nano-iron improved drought tolerance, yield, and seed quality of soybean, so exogenous foliar sprays of 200 ppm Fe3O4 were more effective than the other treatments in enhancing drought tolerance and can be utilized to reduce losses caused by drought stress in soybean-growing areas.

Keywords: drought stress; foliar spray; nano Fe3O4 particles; seed oil content; seed protein content; seed yield.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Effect of nano-Fe3O4 fertilizers on relative water content (RWC) of soybean after 15 days of first spraying (flowering stage) under well-watered and drought conditions. Bars indicate (±SE). Different letters in the bars indicate significantly differ at p < 0.05 by LSD.
Figure 2
Figure 2
Effect of nano-Fe3O4 fertilizers on water saturation deficit (WSD) of soybean after 15 days of first spraying (flowering stage) under well-watered and drought conditions. Bars indicate (±SE). Different letters in the bars indicate significantly differ at p < 0.05 by LSD.
Figure 3
Figure 3
Biplot of PC1 vs. PC2.
See this image and copyright information in PMC

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