☆ 4.7 Article

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

FRONTIERS IN PLANT SCIENCE (2022)

Journal

FRONTIERS IN PLANT SCIENCE

Volume 13, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA

DOI: 10.3389/fpls.2022.992535

Keywords

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

Funding

National Research Development Projects to Finance Excellence by the Romanian Ministry of Research and Innovation [PN-III-P4-IDPCE-2020-2126]
UEFISCDI
[PFE)-14/2022-2024]

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Abstract

This study evaluates the effects of foliar spray containing varying doses of nano-iron on the growth, physiology, yield, and seed quality of soybean under drought and well-watered conditions. The results show that nano-iron significantly improves the growth, yield, and nutritional quality of soybean seeds, demonstrating its potential as a drought-tolerance enhancer.

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.

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Constitutive expression of AtSINA2 from Arabidopsis improves grain yield, seed oil and drought tolerance in transgenic soybean

Jin Yang, Tingting Mao, Zigui Geng, Wenwen Xue, Lan Ma, Yu Jin, Pan Guo, Zitong Qiu, Limin Wang, Chunyan Yu, Yuting Sheng, Juan Zhang, Hongxia Zhang

Summary: In this study, it was demonstrated that ectopic expression of AtSINA2 in soybean improved shoot growth, grain yield, drought tolerance, and seed oil content in transgenic plants. Physiological analyses showed that the increased drought tolerance was accompanied with higher chlorophyll content and lower malondialdehyde accumulation and water loss. Transcriptomic analyses revealed that the expressions of genes related to plant growth, flowering, and stress response were regulated in transgenic soybean under normal and drought stress conditions. These findings suggest that AtSINA2 can improve agricultural production and drought tolerance in soybean.

PLANT PHYSIOLOGY AND BIOCHEMISTRY (2023)