关键词: Granier经验公式, 毛白杨, 热扩散式探针, 树干液流

Abstract: To have an overall understanding about the physiological mechanisms of plants in their lead (Pb) absorption, transportation, accumulation, and detoxif ication is the prerequisite of the phytoremediation of Pb-polluted soil. This paper reviewed the research advances in the mechanisms of plant Pb-adaptation and recovery, including the functions of cell wall and vacuole in Pb-inactivati on and sequestration in plant cells, the effects of plant root exudates on Pb bi oavailability, the roles of antioxidative enzymes dismutase (SOD), peroxidase (P OD), catalase (CAT), glutathione reductase (GR), and ascorbate peroxidase (APX), and of antioxidants phytochelatins (PCs) and glutathione in Pb detoxification, and the expression and function of metallothionein and Pb-specific genes. The further researches on the plant’s Pb-tolerance and detoxification mechanisms as well as the technologies for phytoremediation of Pb-contaminated environmen ts were prospected.

Key words: Populus tomentosa, Granier empirical formula, sap flow, thermal dissipation probe (TDP)