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366242 
Journal Article 
Effects of Pb pollution on seed vigor of three rice cultivars 
Zhang, S; Hu, J; Chen, Z; Chen, J; Zheng, Y; Song, W 
2005 
12 
3 
197-201 
An experiment was conducted to study the effects of different Pb concentrations on the seed germination and seedling growth of three rice cultivars (Jiayu 293, Jiayu 948 and Xieyou 963). The method of qualitative traits combined with quantitative traits by orthogonal polynomials was applied to analyse rice seed vigour by regression model. The seeds from different rice cultivars had different sensitivity to Pb poison. Pb significantly decreased root length and shoot height, and the degree of reduction was aggravated with increasing Pb concentration from 100 to 700 mg/litre. However, Pb did not reduce root dry weight and shoot dry weight, which indicated that different physiological characteristics had different sensitive reactions to Pb. A regression equation was developed, which could be used to predict the effects of different Pb concentrations on rice seed vigour. 
application rates; cultivars; lead; mathematical models; regression analysis; rice; roots; seed germination; seedling growth; seedlings; seeds; shoots; vigour; Oryza; Oryza sativa; Poaceae; Cyperales; monocotyledons; angiosperms; Spermatophyta; plants; eukaryotes; cultivated varieties; paddy; vigor; Field Crops (FF005) (New March 2000); Plant Breeding and Genetics (FF020); Plant Physiology and Biochemistry (FF060); Plant Toxicology (FF800); Mathematics and Statistics (ZZ100)