Growth and mineral content of roots and shoots of maize seedlings in response to increasing water deficits induced by PEG solutions

摘要: Abstract The effects of polyethylene glycol (PEG) solutions increasing osmotic potentials (ψπ=−0.44 and ‐0.88 MPa) on the growth seedlings concentrations Mn, Cu, Pb, Zn, Ni, Co, Mo, Cr, Cl, Fe, Ca, Mg, K, Na, P, N were determined in shoots roots maize (Zea mays L. cv. Summer II) grown Hoagland's solution a chamber. Water stress was imposed for three days with PEG 4000 six‐day‐old seedlings. Despite reduction leaf water potential (ψw), which decreased concentrations, despite an increase saturation deficit (W.S.D.), pressure (ψp) maintained both treatments at levels quite similar to that control At ψπ=−0.44 MPa medium, length dry weight significantly decreased, whereas ψπ=−0.88 only root continued decrease consequence total mass production ψπ=−0....