Abstract
Zinc (Zn) and nickel (Ni) accumulation in the seedlings of two pigeonpea [Cajanus cajan (L.) Millspaugh] cultivars were studied under different concentrations of Zn and Ni supplied. Significant differences in the seedling growth were observed between the two cultivars of pigeonpea as well as between Zn and Ni treatments. The Zn and Ni treatments decreased dry weights and relative growth indices of the roots and shoots. The Zn and Ni accumulation was greater in the roots of cv. LRG30 than cv. ICPL87. The amount of metal ions allocated to the shoots was more in cv. ICPL87 than in cv. LRG30. The conspicuous compartmentation of Zn and Ni in the roots of the seedlings and the differential responses of the two cultivars of pigeonpea to these heavy metals indicated that cv. LRG30 possesses better root compartmentation of Zn and Ni and therefore resulted in relatively better growth than cv. ICPL87.
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