Abstract: With the development of nanotechnology, engineered carbon nanomaterials are widely used in many fields. Meanwhile, ECNMs inevitably release into the environment, which will enhance the chances of contact with organisms. Biological toxicity and potential environmental risks can not be ignored. Plants are an important source of human food. At present, the researches have shown that ECNMs have toxic effects on plants and threaten food safety and human health. Based on the brief introduction of the environmental sources of ECNMs, the research progress of the effect and mechanism of ECNMs on the physiological growth of plants at home and abroad was summarized, the current research methods and challenges were discussed, so as to provide theoretical basis and practical reference for the biosafety assessment, plant protection and rational planning and using of raw materials of ECNMs.

Key words: carbon nanomaterials, plant toxicity, mechanism of action, biological safety