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Several abiotic stress factors are faced by the plants in nature, including metal exposure and water deficit condition. The present study was undertaken to investigate the effects of copper and its combination with water deficit, on growth and anatomical characteristics of Zea mays L. (maize) cv. Ganga safed-2 seedlings. Seeds were treated with CuSO4 (0-1000µM) for inducing Cu stress, PEG 6000 (0-10%) for inducing water deficit stress and their combination for combined stress for 5 days. Germination %, growth parameters, % phytotoxicity, and root anatomical characteristics were analyzed. Treatment of maize seeds with 0-1000µM CuSO4 significantly reduced almost all the growth parameters, except germination %. Root growth was inhibited significantly at 100µM and higher concentrations of CuSO4, however, for shoot growth, ?300µM are inhibitory. Germination percentage was not affected by the supplementation of Cu, indicating the tolerant nature of Ganga safed-2 maize genotype at germination stage. Treatment with Cu (?300µM) and PEG 6000 (10%), decreased the growth of maize seedlings with prominent effect on root by Cu and on the shoot by 10% PEG. Anatomical modifications in root were noticed with both the stresses, individually and in combination.

Early seedling growth affected by CuSO4 and its combination with PEG 6000 in maize