Botany Department, University of Lucknow, Lucknow, 226007.
*Corresponding author.
Cotton (Gossypium sp. var Lohit) was grown with adequate (1 μM) and deficient (0.1 μM) copper in controlled sand culture. Copper deficiency caused reduction in growth and dry matter yield and was associated with decrease in Cu concentration in different plant parts. The leaves of Cu deficient plants showed lower chlorophyll concentration, Hill reaction activity, transpiration rate and higher diffusive resistance. The Cn deficient plants also showed increased accumulation ofthe cationic micronutrients, other than Cu, viz Fe, Mn and Zn. Increasing Cu supply from deficient to adequate reversed the Cu induced changes to varying extent.
Coton, Cu deficiency, Hill activity, micronutrients, transpiration
