Effect of Zinc Activities on Shoot, Root Biomass and Phosphorus Uptake in Wheat Gynotypes
An experiment was conducted to find out the variation in tolerance toward Zn deficiency among four different wheat genotypes using chelate-buffered nutrient solution of three Zn activities. The genotypes 2+ (NRL-1027, NRL-1241, NRL-1242 and NRL-1243) were transplanted to nutrient culture solution in a net house for 45 days to find the impression of various levels of Zn activity (2, 10 and 40 pecomolar (pM) ) on shoot and 2+ root biomass. Among all the wheat genotypes,“NRL-1242” exhibited the highest tolerance to Zn deficiency and hence categorized as Zn-efficient, whereas “NRL-1243” proved to be Zn-inefficient. The remaining two genotypes were medium in efficiency on the above criteria. Efficient wheat genotype “NRL-1242” showed less reduction in growth and accumulated higher P at all lower Zn activities. Thus on the basis of survival in low Zn availability genotypes “NRL-1242”may be used by the researchers to plan their breeding experiments and to set genotype specific recommendations to Zn deficient soils.