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| Effects of ZnO nanoparticles on the germination and seedling growth of four legume seeds |
| Received:December 19, 2020 |
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| KeyWord:ZnO NPs;pea;mung bean;alfalfa;white clover |
| Author Name | Affiliation | E-mail | | PENG Qing-qing | Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China
College of Resources and Environmental Science, Northwest A&F University, Yangling 712100, China | | | YANG Jing-ya | College of Resources and Environmental Science, Northwest A&F University, Yangling 712100, China | | | ZHONG Min-zheng | College of Resources and Environmental Science, Northwest A&F University, Yangling 712100, China | | | XING Yang-yang | College of Resources and Environmental Science, Northwest A&F University, Yangling 712100, China | | | LI Zi-yan | Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China
College of Resources and Environmental Science, Northwest A&F University, Yangling 712100, China | | | MAO Hui | Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China
College of Resources and Environmental Science, Northwest A&F University, Yangling 712100, China | | | ZHOU Li-na | College of Resources and Environmental Science, Northwest A&F University, Yangling 712100, China | zhoulina@nwsuaf.edu.cn |
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| Abstract: |
| In this study, the effects of different zinc oxide nanoparticles（ZnO NPs）concentrations on germination, seedling growth, and zinc contents with edible and feed legumes（pea, mung bean, alfalfa, and white clover）were investigated through germination trials. Results showed that, no significant differences in the germination rates of the four legumes with ZnO NPs concentrations（10, 50, 100, 200, 400, 800 mg·L-1）compared with the control. The biomasses of pea and mung bean seedlings increased first and then decreased with the increase in ZnO NPs concentrations, while alfalfa and white clover tended to decrease. Pea, mung bean, alfalfa, and white clover seedlings showed different sensitivities to ZnO NPs; the dose-response thresholds with root length were 200, 100, 50 mg·L-1, and 50 mg·L-1, respectively. The four seedlings' root length decreased with the increase of ZnO NPs concentration when exceeding these thresholds. The root growth inhibition rates with the 800 mg·L-1 ZnO NP treatment for pea, mung bean, alfalfa, and white clover were 68%, 75%, 83%, and 85%, respectively, indicating phytotoxicity. The malondialdehyde（MDA）content in the seedlings was also determined. The stress effect of high concentration（100~800 mg·L-1）ZnO NPs was stronger for pea and white clove seedlings than on mung bean and alfalfa. Zinc contents in pea, mung bean, alfalfa, and white clover seedlings increased from 9.17, 12.04, 8.98 mg·kg-1, and 17.84 mg·kg-1 with the control, to 83.96, 82.96, 212.48 mg·kg-1, and 263.21 mg·kg-1 with the highest ZnO NPs treatments, respectively. In summary, the sensitivity of different types of legumes to ZnO NPs differed in the order of white clover, alfalfa, mung bean, and pea from high to low. |
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