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| Mechanistic mechanism of calcium L-aspartate nanoparticles to promote the growth of rape |
| Received:December 06, 2021 |
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| KeyWord:calcium L-aspartate nanoparticles;rape;growth;physiological characteristic |
| Author Name | Affiliation | E-mail | | HOU Jiayu | Microelement Research Center, School of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | YAN Lei | Microelement Research Center, School of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
Key Laboratory of Horticultural Plant Biology, Ministry of Education, School of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, China | | | CHENG Jin | Microelement Research Center, School of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | ZENG Zijun | Microelement Research Center, School of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | ZHANG Yaru | Microelement Research Center, School of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | LU Kesong | Microelement Research Center, School of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | JIANG Cuncang | Microelement Research Center, School of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
School of Agriculture, Key Laboratory of Oasis Ecological Agriculture, Xinjiang Production and Construction Corps, Shihezi University, Shihezi 832000, China | jcc2000@mail.hzau.edu.cn |
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| Abstract: |
| An experiment was carried out in a green-house at Huazhong Agricultural University to reveal the effects of exogenous Laspartate nano-calcium[Ca (L-asp) - NPs] on the growth of rape (Brassica napus) grown hydroponically. We applied six treatments:different concentrations of Ca (L-asp)-NPs (0, 25, 50, 75, 100 mg·L-1) and ionic calcium[1.18 g·L-1 Ca (NO3) 2]. The dry and fresh weight, root morphological parameters, calcium content, chlorophyll, photosynthetic parameters, MDA, and soluble protein content were and improved the photosynthetic rate of leaves. Applying <100 mg·L-1 Ca (L-asp)-NPs, the total root length, total surface area, and apical number increased significantly by 76.08%, 30.78%, and 1 107.31%, respectively; net photosynthetic rate, intercellular CO2 concentration, stomatal conductance, and transpiration rate also increased significantly by 295.31%, 31.90%, 1 158.03%, and 376.74%, respectively. In addition, the application of Ca (L-asp)-NPs decreased MDA levels in rape leaves, while increasing the content of soluble protein in the plants. The research shows that exogenous Ca (L-asp)-NPs can be used as a nano fertilizer to supplement calcium nutrition for rape. The optimum concentration of Ca (L-asp)-NPs is 100 mg·L-1 as this showed the best growth potential, while the growth of rape treated with <100 mg·L-1 Ca (L-asp)-NPs has the closest to the appropriate calcium level. Ca (L-asp)-NPs has the potential to be popularized as a new nano calcium fertilizer in agricultural production. determined. The results showed that lower concentrations of Ca (L-asp)-NPs (25, 50, 75 mg·L-1) had no significant effect on the growth of rape but a higher concentration of Ca (L-asp) - NPs (100 mg · L-1) increased plant biomass, including plant height and root length. Compared with NPS-0, the application of Ca (L-asp)-NPs promoted the growth of rape roots, enhanced the chlorophyll content of leaves, and improved the photosynthetic rate of leaves. Applying <100 mg·L-1 Ca(L-asp)-NPs, the total root length, total surface area, and apical number increased significantly by 76.08%, 30.78%, and 1 107.31%, respectively; net photosynthetic rate, intercellular CO2 concentration, stomatal conductance, and transpiration rate also increased significantly by 295.31%, 31.90%, 1 158.03%, and 376.74%, respectively. In addition, the application of Ca(L-asp)-NPs decreased MDA levels in rape leaves, while increasing the content of soluble protein in the plants. The research shows that exogenous Ca(L-asp)-NPs can be used as a nano fertilizer to supplement calcium nutrition for rape. The optimum concentration of Ca(L-asp)-NPs is 100 mg·L-1 as this showed the best growth potential, while the growth of rape treated with <100 mg·L-1 Ca(L-asp)-NPs has the closest to the appropriate calcium level. Ca(L-asp)-NPs has the potential to be popularized as a new nano calcium fertilizer in agricultural production. |
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