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| Effects of exogenous calcium L-aspartate nanoparticles on cotton growth and its potential mechanisms |
| Received:July 18, 2019 |
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| KeyWord:cotton;chlorophyll;calcium L-aspartate nanoparticles;antioxidant enzymes |
| Author Name | Affiliation | E-mail | | LIU Ya-lin | Microelement Research Center, Huazhong Agricultural University, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | YAN Lei | Microelement Research Center, Huazhong Agricultural University, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | ZENG Yu | Microelement Research Center, Huazhong Agricultural University, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | JIA Zhi-xian | Microelement Research Center, Huazhong Agricultural University, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | JIANG Cun-cang | Microelement Research Center, Huazhong Agricultural University, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | jcc2000@mail.hzau.edu.cn |
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| Abstract: |
| To investigate the effect of calcium L-aspartate nanoparticles[Ca(L-asp)-NPs] on cotton growth after entering the environment, using cotton(E'kang 8) as the experimental material, and a total of 5 Ca(L-asp)-NPs concentrations set at 0, 25, 50, 75 mg·L-1 and 100 mg·L-1. The pot experiment was carried out in the greenhouse of Huazhong Agricultural University. The dry and fresh weights, root morphological parameters, Ca content, chlorophyll, root antioxidant enzymes, malondialdehyde(MDA), and electrical conductivity were determined. Compared with the control, Ca(L-asp)-NPs treatments significantly reduced the dry and fresh weights of cotton and inhibited root elongation. The maximum Ca content in root, stem and leaves were 7905, 13 144 mg·kg-1 and 38 117 mg·kg-1, respectively, which increased by 102%, 61% and 51%, respectively when compared with the control; however the Ca transfer factor decreased significantly after Ca(L-asp)-NPs application. In addition, exogenous Ca(L-asp)-NPs also significantly reduced chlorophyll content, root antioxidant enzymes activity, and electrical conductivity; in addition, MDA content was also significantly decreased except in 25 mg·L-1 treatment. In conclusion, it was determined that Ca(L-asp)-NPs can inhibit the physiological activity of cotton and further inhibit cotton growth and that cotton will increase its root-shoot ratio to adapt to stress. |
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