Correlation between concentration and accumulation of shoot zinc in rice genotypes with varying zinc efficiency.

摘要

An experiment was designed in a greenhouse in Coimbatore, Tamil Nadu, India, during 2004-05 to screen rice genotypes for zinc efficiency using solution culture technique with modified Hoagland's solution as the nutrient medium. Approximately 56 rice genotypes were subjected to screening with five zinc treatments (0, 0.025, 0.05, 0.1 and 0.2 ppm) with each treatment replicated three times. The concentration of zinc in the shoot was analysed at 35 days after sowing and the uptake was computed as the product of concentration and dry matter. The data were subjected to Systat multivariate analysis (Systat, 2003) and the genotypes were classified as efficient, moderately efficient and inefficient at each level of deficient and excessive zinc supply. Better correlation was found between shoot zinc concentration and accumulation and those genotypes with higher zinc concentration and accumulation were zinc-efficient genotypes. Zinc-inefficient genotypes had low zinc concentration and accumulation.