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Toxic effects of BaCl2 on germination , early seedling growth , soluble proteins and acid phosphatases in zea mays L.
Abstract
Maize seeds were grown in 0 to 100 mm of BaCl2. A concentration of 0.1 mm was stimulatory for seed germination , shoot length and shoot-root weights . all other treatments )1-100 mM) were inhibitory for seeding growth, as eduction in % germination , root-shoot length and dry weights were observed . the decreases were proportional with the increasing concentrations of Ba++. The soluble protein content and acid phosphtatses activity was estimated from the shoots of 1,4 and 7 day old seedlings. The protein content of the shoots showed a decline on all days at all Ba++ treatments (except at 0.1 mM, where a significant increase in shoots of 1 day and insignificant in 4 day old seedlings was noted). The acid phosphatases activity increased with increasing BaCl2 treatments in shoots of 1 and 4 day old seedings, while in 7 day old seedlings the activity was inhibited at 20-100 mm. the possible morpho-physiological causes underlying the Ba++ mediated growth retardation are discussed.
