The effects of aluminium on root cap function and root development in Zea mays L.

摘要: Abstract Aluminium concentrations ⩽1.25 mg dm −3 promoted a positive growth response in the primary root of Zea mays and this coincided with an increase mean cap volume. Cap volume correlated cell numbers. Significant alterations were limited to periphery where Al caused decrease This implied that action was directed at differentiation peripheral cells observed changes arose through interference by mechanisms which control loss from cap. observation supported reduction number detached, mature surrounding Al-treated roots. Ultrastructural investigation revealed disruption Golgi apparatus activity occurred lowest concentration (0.5 ). A amyloplast numbers diminished these preceded reductions mitotic activity, indicated decreases length only evident excess 1.25 . treatment also resulted redistribution amyloplasts proximal halves central as well linear arrangement cells. The presence associated efflux H + Some more adverse responses Al, including inhibition division, be initiated molar ratio charge between Ca 2+ 3+ favoured Al. may attach relevance electrical properties ion initiation electro-physiological plant